''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regions, with the highest diversity in South America (almost 50 species) and Asia (about 30 species, reviewed in 1972Lansbury I (1972) A review of the Oriental species of ''Ranatra'' Fabricius (Hemiptera-Heteroptera: Nepidae). ''Transactions of the Royal Entomological Society of London'', vol. 124, no. 3. 287-341.). Fewer are found elsewhere, but include several African, some in North America, three from Australia and three from the

Palearctic The Palearctic or Palaearctic is the largest of the eight biogeographic realms of the Earth. It stretches across all of Eurasia north of the foothills of the Himalayas, and North Africa. The realm consists of several bioregions: the Euro-Sibe ...

, notably the relatively well-known European '' R. linearis''. Since ''Ranatra'' belongs to the family Nepidae which in turn belongs to the order

Hemiptera Hemiptera (; ) is an order (biology), order of insects, commonly called true bugs, comprising over 80,000 species within groups such as the cicadas, aphids, planthoppers, leafhoppers, Reduviidae, assassin bugs, Cimex, bed bugs, and shield bugs. ...

, ranatrids are considered "true bugs". These brown insects are primarily found in stagnant or slow-moving water like ponds, marshes and canals, but can also be seen in streams. Exceptionally they have been recorded from

hypersaline lake A hypersaline lake is a landlocked body of water that contains significant concentrations of sodium chloride, brines, and other salts, with saline levels surpassing that of ocean water (3.5%, i.e. ). Specific microbial species can thrive in ...

s and brackish lagoons.

Biology

The front

legs A leg is a weight-bearing and locomotive anatomical structure, usually having a columnar shape. During locomotion, legs function as "extensible struts". The combination of movements at all joints can be modeled as a single, linear element ...

of bugs in ''Ranatra'' are strong and used to grasp prey. They typically eat other insects, tadpoles and small fish, which they pierce with their proboscis and inject a saliva which both sedates and begins to digest their prey. They are

sit-and-wait predator Ambush predators or sit-and-wait predators are carnivorous animals that capture or trap prey via stealth, luring or by (typically instinctive) strategies utilizing an element of surprise. Unlike pursuit predators, who chase to capture prey usi ...

s that reside among water plants and position themselves head-down with their grasping legs extended out to surprise passing prey. At least one species will also swim in open water at night to catch zooplanktonic organisms. Like other members in the family they have a long tail-like

siphon A siphon (from grc, σίφων, síphōn, "pipe, tube", also spelled nonetymologically syphon) is any of a wide variety of devices that involve the flow of liquids through tubes. In a narrower sense, the word refers particularly to a tube in a ...

, or breathing tube, on the rear end of their body. The adult body length is generally depending on the exact species, and females average larger than males of the same species. The siphon is typically almost the same size, but varies from less than half the body length to somewhat longer. Two of the largest species are the East Asian ''R. chinensis'' and South American ''R. magna''. ''Ranatra'' do have wings and they can fly. The adults are active year-round, except in extreme cold. Their eggs are positioned on plants just below the water surface, but in some species they can be placed in mud. The eggs typically take two to four weeks to hatch and the young take about two months to mature. RanatraLinearisHead.JPG, ''Ranatra linearis'' Ranatra chinensis.svg, ''Ranatra chinensis'' Water Scorpion - Ranatra species, Merrimac Farm Wildlife Management Area, Aden, Virginia.jpg, ''Ranatra'' crawling on human fingers Among the four genera in the Ranatrinae subfamily, '' Austronepa'' and '' Goondnomdanepa'' are restricted to Australia. '' Cercotmetus'' from Asia to New Guinea resembles ''Ranatra'', although the former has a distinctly shorter siphon.

Species

The Global Biodiversity Information Facility lists:Global Biodiversity Information Facility: ''Ranatra'' Fabricius, 1790 (retrieved 12 January 2021)
/ref> * ''

Ranatra absona ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regions ...

'' Drake & De Carlo, 1953 * ''

Ranatra acapulcana ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regions ...

'' Drake & De Carlo, 1953 * ''

Ranatra adelmorpha ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regions ...

'' Nieser, 1975 * ''

Ranatra aethiopica ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regions ...

'' Montandon, 1903 * ''

Ranatra akoitachta ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regions ...

'' Nieser, 1996 * ''

Ranatra ameghinoi ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regions ...

'' De Carlo, 1970 * ''

Ranatra annulipes ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regions ...

'' Stål, 1854 * ''

Ranatra attenuata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regions ...

'' Kuitert, 1949 * ''

Ranatra australis ''Ranatra australis'', the southern water scorpion, is a species of waterscorpion in the family Nepidae Nepidae is a family of exclusively aquatic Heteropteran insects in the order Hemiptera. They are commonly called water scorpions for thei ...

'' Hungerford, 1922^{i c g b} (southern water scorpion) * ''

Ranatra bachmanni ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regions ...

'' De Carlo, 1954 * ''

Ranatra bilobata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Tran & Nguyen, 2016 * ''

Ranatra biroi ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Lundblad, 1933 * ''

Ranatra bottegoi ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Montandon, 1903 * ''

Ranatra brasiliensis ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' De Carlo, 1946 * ''

Ranatra brevicauda ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1905 * ''

Ranatra brevicollis ''Ranatra brevicollis'' is a species of waterscorpion Nepidae is a family of exclusively aquatic Heteropteran insects in the order Hemiptera. They are commonly called water scorpions for their superficial resemblance to scorpions, due to thei ...

'' Montandon, 1910^{i c g b} * ''

Ranatra buenoi ''Ranatra buenoi'' is a species of waterscorpion Nepidae is a family of exclusively aquatic Heteropteran insects in the order Hemiptera. They are commonly called water scorpions for their superficial resemblance to scorpions, due to their rap ...

'' Hungerford, 1922^{i c g b} * ''

Ranatra camposi ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1907 * ''

Ranatra capensis ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Germar, 1837 * ''

Ranatra cardamomensis ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Zettel, Phauk, Kheam & Freitag, 2017 * '' Ranatra chagasi'' De Carlo, 1946 * ''

Ranatra chariensis ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Poisson, 1949 * '' Ranatra chinensis'' Mayr, 1865 * ''

Ranatra cinnamomea ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Distant, 1904 * '' Ranatra compressicollis'' Montandon, 1898 * ''

Ranatra costalimai ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' De Carlo, 1954 * ''

Ranatra cruzi ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' De Carlo, 1950 * ''

Ranatra curtafemorata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Kuitert, 1949 * ''

Ranatra denticulipes ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Montandon, 1907 * ''

Ranatra digitata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Hafiz & Pradhan, 1949 * ''

Ranatra diminuta ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1907 * ''

Ranatra dispar ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1903 * ''

Ranatra distanti ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1910 * ''

Ranatra doesburgi ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' De Carlo, 1963 * ''

Ranatra dolichodentata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Kuitert, 1949 * ''

Ranatra dormientis ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Zhang et al., 1994 * ''

Ranatra drakei ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Hungerford, 1922 * ''

Ranatra ecuadoriensis ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' De Carlo, 1950 * ''

Ranatra elongata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regions ...

'' Fabricius, 1790 * ''

Ranatra emaciata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Montandon, 1907 * ''

Ranatra fabricii ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Guérin-Méneville, 1857 * ''

Ranatra falloui ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1907 * ''

Ranatra feana ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1903 * ''

Ranatra fianarantsoana ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Poisson, 1963 * ''

Ranatra filiformis ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Fabricius, 1790 * ''

Ranatra flagellata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Lansbury, 1972 * '' Ranatra flokata'' Nieser & Burmeister, 1998 * ''

Ranatra fusca Ranatra fusca is a water stick-insect ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the ...

'' Palisot, 1820^{i c g b} (brown waterscorpion) * ''

Ranatra fuscoannulata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regions ...

'' Distant, 1904 * ''

Ranatra galantae ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Nieser, 1969 * ''

Ranatra gracilis ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Dallas, 1850 * ''

Ranatra grandicollis ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Montandon, 1907 * ''

Ranatra grandocula ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Bergroth, 1893 * ''

Ranatra hechti ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' De Carlo, 1967 * ''

Ranatra heoki ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Tran & Poggi, 2019 * ''

Ranatra heydeni ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1909 * ''

Ranatra horvathi ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1910 * ''

Ranatra hungerfordi ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Kuitert, 1949 * ''

Ranatra incisa ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Chen, Nieser & Ho, 2004 * ''

Ranatra instaurata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regions ...

'' Montandon, 1914 * ''

Ranatra insulata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Barber, 1939 * ''

Ranatra jamaicana ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Drake & De Carlo, 1953 * ''

Ranatra katsara ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Nieser, 1997 * ''

Ranatra kirkaldyi ''Ranatra kirkaldyi'' is a species of waterscorpion in the family Nepidae. It is found in North America. Subspecies These two subspecies belong to the species ''Ranatra kirkaldyi'': * ''Ranatra kirkaldyi hoffmanni'' Hungerford, 1922 * ''Ranatr ...

'' Torre-bueno, 1905^{i c g b} * ''

Ranatra lanei ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' De Carlo, 1946 * ''

Ranatra lansburyi ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Chen, Nieser & Ho, 2004 * ''

Ranatra lenti ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' De Carlo, 1950 * ''

Ranatra lethierryi ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Montandon, 1907 * ''

Ranatra libera ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Zettel, 1999 * ''

Ranatra linearis ''Ranatra linearis'' is a species of aquatic bug in the Nepidae family. It is native to Eurasia and North Africa, and primarily found near aquatic plants in ponds, marshes and other freshwater habitats, but has exceptionally been recorded from h ...

'' (Linnaeus, 1758)^{i c g} * ''

Ranatra longipes ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Stål, 1861 * ''

Ranatra lualalai ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Poisson, 1964 * '' Ranatra lubwae'' Poisson, 1965 * ''

Ranatra machrisi ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Nieser & Burmeister, 1998 * ''

Ranatra macrophthalma ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Herrich-Schäffer, 1849 * ''

Ranatra maculosa ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Kuitert, 1949 * ''

Ranatra magna ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Kuitert, 1949 * ''

Ranatra malayana ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Lundblad, 1933 * ''

Ranatra mediana ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Montandon, 1910 * ''

Ranatra megalops ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regions ...

'' Lansbury, 1972 * '' Ranatra mixta'' Montandon, 1907 * ''

Ranatra moderata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Kuitert, 1949 * ''

Ranatra montei ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' De Carlo, 1946 * ''

Ranatra montezuma ''Ranatra montezuma'' is a species of waterscorpion in the family Nepidae. It is endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone ...

'' Polhemus, 1976 * ''

Ranatra natalensis ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Distant, 1904 * ''

Ranatra natunaensis ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Lansbury, 1972 * ''

Ranatra neivai ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' De Carlo, 1946 * ''

Ranatra nieseri ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Tran & Nguyen, 2016 * ''

Ranatra nigra ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Herrich-Schaeffer, 1849 * '' Ranatra nodiceps'' Gerstaecker, 1873 * ''

Ranatra nodioeps ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Gerstaecker, 1873 * ''

Ranatra obscura ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1907 * ''

Ranatra occidentalis ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Lansbury, 1972 * ''

Ranatra odontomeros ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Nieser, 1996 * ''

Ranatra oliveiracesari ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' De Carlo, 1946 * ''

Ranatra operculata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Kuitert, 1949 * ''

Ranatra ornitheia ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Nieser, 1975 * ''

Ranatra parmata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Mayr, 1865 * ''

Ranatra parvipes ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Signoret, 1861 * ''

Ranatra parvula ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Kuitert, 1949 * ''

Ranatra pittieri ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1910 * ''

Ranatra protense ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon * ''

Ranatra quadridentata ''Ranatra quadridentata'' is a species of waterscorpion Nepidae is a family of exclusively aquatic Heteropteran insects in the order Hemiptera. They are commonly called water scorpions for their superficial resemblance to scorpions, due to th ...

'' Stål, 1862^{i c g b} * ''

Ranatra rabida ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Buchanan White, 1879 * ''

Ranatra rafflesi ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Tran & D.Polhemus, 2012 * ''

Ranatra rapax ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Stål, 1865 * ''

Ranatra recta ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Chen, Nieser & Ho, 2004 * ''

Ranatra robusta ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1905 * ''

Ranatra sagrai ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Drake & De Carlo, 1953 * ''

Ranatra sarmientoi ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' De Carlo, 1967 * ''

Ranatra sattleri ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' De Carlo, 1967 * ''

Ranatra schuhi ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' D.Polhemus & J.Polhemus, 2012 * ''

Ranatra segrega ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1913 * ''

Ranatra signoreti ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1905 * ''

Ranatra similis ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Drake & De Carlo, 1953 * '' Ranatra siolii'' De Carlo, 1970 * ''

Ranatra sjostedti ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1911 * ''

Ranatra spatulata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Kuitert, 1949 * ''

Ranatra spinifrons ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1905 * ''

Ranatra spoliata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Montandon, 1912 * ''

Ranatra stali ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1905 * '' Ranatra sterea'' Chen, Nieser & Ho, 2004 * ''

Ranatra subinermis ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Montandon, 1907 * ''

Ranatra sulawesii ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Nieser & Chen, 1991 * ''

Ranatra surinamensis ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' De Carlo, 1963 * ''

Ranatra texana ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Hungerford, 1930 * ''

Ranatra thai ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Lansbury, 1972 * ''

Ranatra titilaensis ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Hafiz & Pradhan, 1949 * ''

Ranatra travassosi ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' De Carlo, 1950 * ''

Ranatra tridentata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Poisson, 1965 * ''

Ranatra tuberculifrons ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regions ...

'' Montandon, 1907 * ''

Ranatra unicolor ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Scott, 1874 * ''

Ranatra unidentata ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Stål, 1861 * ''

Ranatra usingeri ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' De Carlo, 1970 * '' Ranatra varicolor'' Distant, 1904 * ''

Ranatra varipes ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Stål, 1861 * ''

Ranatra vitshumbii ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Poisson, 1949 * '' Ranatra wagneri'' Hungerford, 1929 * ''

Ranatra weberi ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' De Carlo, 1970 * ''

Ranatra williamsi ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate regi ...

'' Kuitert, 1949 * ''

Ranatra zeteki ''Ranatra'' is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. There are around 100 ''Ranatra'' species found in freshwater habitats around the world, both in warm and temperate region ...

'' Drake & De Carlo, 1953 Data sources: i = ITIS, c = Catalogue of Life, g = GBIF, b = Bugguide.net

References

External links

* * {{Taxonbar, from=Q1154489 Nepidae Nepomorpha genera