The dark long-tongued bat (''Lichonycteris obscura'') is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

bat Bats are mammals of the order Chiroptera.''cheir'', "hand" and πτερόν''pteron'', "wing". With their forelimbs adapted as wings, they are the only mammals capable of true and sustained flight. Bats are more agile in flight than most bi ...

from

South South is one of the cardinal directions or Points of the compass, compass points. The direction is the opposite of north and is perpendicular to both east and west. Etymology The word ''south'' comes from Old English ''sūþ'', from earlier Pro ...

and

Central America Central America ( es, América Central or ) is a subregion of the Americas. Its boundaries are defined as bordering the United States to the north, Colombia to the south, the Caribbean Sea to the east, and the Pacific Ocean to the west. ...

. It was formerly considered the only species within the genus ''

Lichonycteris ''Lichonycteris'' (Little long-tongued bat) is a genus of bats in the family Phyllostomidae. Its members are native to South America. Species *''L. degener'' (Gerrit Smith Miller Jr., Miller, 1931): Pale brown long-nosed bat *''L. obscura'' (Old ...

,'' but is now recognized as one of two species in that genus, along with the pale brown long-nosed bat. It is small species of bat, with adults weighing and having a total length of . The dark long-tongued bat is found in all of Central America south of Chiapas, along with the Andean region of the Amazon versant and the

Andes The Andes, Andes Mountains or Andean Mountains (; ) are the longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range is long, wide (widest between 18°S – 20°S ...

Venezuela Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and many islands and islets in th ...

Colombia Colombia (, ; ), officially the Republic of Colombia, is a country in South America with insular regions in North America—near Nicaragua's Caribbean coast—as well as in the Pacific Ocean. The Colombian mainland is bordered by the Car ...

, western

Ecuador Ecuador ( ; ; Quechua: ''Ikwayur''; Shuar: ''Ecuador'' or ''Ekuatur''), officially the Republic of Ecuador ( es, República del Ecuador, which literally translates as "Republic of the Equator"; Quechua: ''Ikwadur Ripuwlika''; Shuar: ''Eku ...

Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = Seal (emblem), National seal , national_motto = "Fi ...

and

Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...

. It mainly inhabits old-growth forests, but is also found in other habitats. It reproduces during the

Neotropical The Neotropical realm is one of the eight biogeographic realms constituting Earth's land surface. Physically, it includes the tropical terrestrial ecoregions of the Americas and the entire South American temperate zone. Definition In bioge ...

dry season. Embryos can form up to 30% of the female's body weight. The bat's diet consists of

nectar Nectar is a sugar-rich liquid produced by plants in glands called nectaries or nectarines, either within the flowers with which it attracts pollinating animals, or by extrafloral nectaries, which provide a nutrient source to animal mutualists ...

pollen Pollen is a powdery substance produced by seed plants. It consists of pollen grains (highly reduced microgametophytes), which produce male gametes (sperm cells). Pollen grains have a hard coat made of sporopollenin that protects the gametophyt ...

, and insects. It is classified as being of

least concern A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation because the specific species is still plentiful in the wild. T ...

by the

International Union for Conservation of Nature The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natu ...

(IUCN) due to its large range and presence in protected areas. However, the Ecuadorian Red List of Mammals lists it as being vulnerable.

Taxonomy and systematics

The dark long-tongued was described by the British

mammalogist In zoology, mammalogy is the study of mammals – a class of vertebrates with characteristics such as homeothermic metabolism, fur, four-chambered hearts, and complex nervous system In biology, the nervous system is the highly complex part o ...

Oldfield Thomas Michael Rogers Oldfield Thomas (21 February 1858 – 16 June 1929) was a British zoologist. Career Thomas worked at the Natural History Museum on mammals, describing about 2,000 new species and subspecies for the first time. He was appoin ...

in 1895 as ''Lichonycteris obscura'', on the basis of a specimen from

Managua ) , settlement_type = Capital city , motto = , image_map = , mapsize = , map_caption = , pushpin_map = Nicara ...

. The generic name ''Lichonycteris'' is from the

Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor ...

words ''lichas'', meaning hanging on the cliff, and ''nycteris'', meaning bat. The specific epithet ''obscura'' is from the

Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...

word ''obscura'', meaning dark-colored. The dark long-tongued bat is one of two species in the

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

''. The other species in the genus, the pale brown long-nosed bat, was formerly considered to be

conspecific Biological specificity is the tendency of a characteristic such as a behavior or a biochemical variation to occur in a particular species. Biochemist Linus Pauling stated that "Biological specificity is the set of characteristics of living organ ...

(the same species as) with the dark long-tongued bat, and was occasionally included as a subspecies of the latter. Both species in ''Lichonycteris'' are part of a highly specialized group of glossophagines in the

subtribe Subtribe is a taxonomic category ranking which is below the rank of tribe and above genus. The standard suffix for a subtribe is -ina (in animals) or -inae (in plants Plants are predominantly photosynthetic eukaryotes of the kingdom Plant ...

Choeronycterina. It has no recognized

subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...

Description

The dark long-tongued bat is a small species of bat, with a forearm length of , a tail length of and a total length of . Adults weigh . Its hair is tricolored, with a narrow dark brown basal band in the dorsal

fur Fur is a thick growth of hair that covers the skin of mammals. It consists of a combination of oily guard hair on top and thick underfur beneath. The guard hair keeps moisture from reaching the skin; the underfur acts as an insulating blanket t ...

, and a slightly darker dorsum. The wing membrane is attached to the feet at around half the length of the

metatarsals The metatarsal bones, or metatarsus, are a group of five long bones in the foot, located between the tarsal bones of the hind- and mid-foot and the phalanges of the toes. Lacking individual names, the metatarsal bones are numbered from the medi ...

. The elbow and the thumb's

metacarpal In human anatomy, the metacarpal bones or metacarpus form the intermediate part of the skeletal hand located between the phalanges of the fingers and the carpal bones of the wrist, which forms the connection to the forearm. The metacarpal bones ...

is densely furred. The tail extends to the knees, and the tip rises up from the well-developed tail membrane, which is attached to the ankles. The

nose-leaf A nose-leaf, or leaf nose, is an often large, lance-shaped nose, found in bats of the Phyllostomidae, Hipposideridae The Hipposideridae are a family of bats commonly known as the Old World leaf-nosed bats. While it has often been seen as a su ...

is small and shaped like an equilateral triangle, with conspicuous

whiskers Vibrissae (; singular: vibrissa; ), more generally called Whiskers, are a type of stiff, functional hair used by mammals to touch, sense their environment. These hairs are finely specialised for this purpose, whereas other types of hair are c ...

. The

calcar The calcar, also known as the calcaneum, is the name given to a spur of cartilage arising from inner side of ankle and running along part of outer interfemoral membrane in bats, as well as to a similar spur on the legs of some arthropods. The cal ...

is characteristically long and is almost the length of the foot. The dark long-tongued bat has a robust and elongated

snout A snout is the protruding portion of an animal's face, consisting of its nose, mouth, and jaw. In many animals, the structure is called a muzzle, rostrum, or proboscis. The wet furless surface around the nostrils of the nose of many mammals is c ...

, with a longer

lower jaw In anatomy, the mandible, lower jaw or jawbone is the largest, strongest and lowest bone in the human facial skeleton. It forms the lower jaw and holds the lower teeth in place. The mandible sits beneath the maxilla. It is the only movable bone ...

that causes the lower lip to extend as a slip. The lower

incisor Incisors (from Latin ''incidere'', "to cut") are the front teeth present in most mammals. They are located in the premaxilla above and on the mandible below. Humans have a total of eight (two on each side, top and bottom). Opossums have 18, whe ...

s are absent. The

dental formula Dentition pertains to the development of teeth and their arrangement in the mouth. In particular, it is the characteristic arrangement, kind, and number of teeth in a given species at a given age. That is, the number, type, and morpho-physiolo ...

is , with 26 total teeth. The dark long-tongued bat may be confused with the lesser long-tongued bat, Godman’s long-tailed bat, and

Ega long-tongued bat The Ega long-tongued bat (''Scleronycteris ega'') is a bat species found in northwestern Brazil and southern Venezuela. It is monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate ...

, but can be distinguished from these and other species of Choeronycterini by its two upper molars, tricolored dorsal fur with a dark basal band, the well-furred elbow, and the length of the wing membrane. It is also similar to the Capixaba nectar-feeding bat, but lacks the

anteriorly Standard anatomical terms of location are used to unambiguously describe the anatomy of animals, including humans. The terms, typically derived from Latin or Greek roots, describe something in its standard anatomical position. This position prov ...

inflated snout and well-developed

premaxilla The premaxilla (or praemaxilla) is one of a pair of small cranial bones at the very tip of the upper jaw of many animals, usually, but not always, bearing teeth. In humans, they are fused with the maxilla. The "premaxilla" of therian mammal has b ...

e of the latter, and also differs in the position of the upper incisors and has three upper

molars The molars or molar teeth are large, flat teeth at the back of the mouth. They are more developed in mammals. They are used primarily to grind food during chewing. The name ''molar'' derives from Latin, ''molaris dens'', meaning "millstone to ...

, against two for the Capixaba nectar-feeding bat.

Biology

Foliage A leaf ( : leaves) is any of the principal appendages of a vascular plant stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, ste ...

is used as a day

roost Roost may refer to: Animal resting * Roosting, resting behavior of birds * Communal roosting, a behavior of some birds and other animals * Monarch butterfly roosts, communal resting sites in monarch butterfly migration * Bat roost, a list of pla ...

by the dark long-tongued bat. Crevices under fallen trees near

stream A stream is a continuous body of water, body of surface water Current (stream), flowing within the stream bed, bed and bank (geography), banks of a channel (geography), channel. Depending on its location or certain characteristics, a stream ...

s are also used as temporary roosts. These are frequently used by migrating bats in

Costa Rica Costa Rica (, ; ; literally "Rich Coast"), officially the Republic of Costa Rica ( es, República de Costa Rica), is a country in the Central American region of North America, bordered by Nicaragua to the north, the Caribbean Sea to the no ...

due to their incidence and the access that they offer to areas that have high levels of food availability for short periods of time.

Reproduction

The dark long-tongued bat reproduces during the

dry season The dry season is a yearly period of low rainfall, especially in the tropics. The weather in the tropics is dominated by the tropical rain belt, which moves from the northern to the southern tropics and back over the course of the year. The te ...

in the

Neotropics The Neotropical realm is one of the eight biogeographic realms constituting Earth's land surface. Physically, it includes the tropics, tropical Ecoregion#Terrestrial, terrestrial ecoregions of the Americas and the entire South American temperat ...

. Females with

embryo An embryo is an initial stage of development of a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male spe ...

s have been reported from

Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...

in May, from

Guatemala Guatemala ( ; ), officially the Republic of Guatemala ( es, República de Guatemala, links=no), is a country in Central America. It is bordered to the north and west by Mexico; to the northeast by Belize and the Caribbean; to the east by H ...

in February, from Costa Rica and Venezuela in March, and from

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

in August. Lactating females have been reported from Costa Rica in January, and from

in October. Embryos can weigh as much as 30 percent of the female's body weight. Male

testicle A testicle or testis (plural testes) is the male reproductive gland or gonad in all bilaterians, including humans. It is homologous to the female ovary. The functions of the testes are to produce both sperm and androgens, primarily testostero ...

s range in size from .

Diet

The dark long-tongued bat feeds on

, and

insect Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body ( head, thorax and abdomen), three pairs ...

s. It pollinates ''

Marcgravia ''Marcgravia'' is a genus of plants in the Marcgraviaceae family commonly eaten by the dwarf little fruit bat. The genus is native to the Caribbean Islands, Central America, and South America, and genus is named in memory of the German naturalist ...

liana A liana is a long- stemmed, woody vine that is rooted in the soil at ground level and uses trees, as well as other means of vertical support, to climb up to the canopy in search of direct sunlight. The word ''liana'' does not refer to a ta ...

s and ''

Vriesea ''Vriesea'' is a genus of flowering plants in the botanical family Bromeliaceae, subfamily Tillandsioideae. The genus name is for Willem Hendrik de Vriese, Dutch botanist, physician (1806–1862). Its species are widespread over Mexico, Central ...

bromeliads The Bromeliaceae (the bromeliads) are a family of monocot flowering plants of about 80 genera and 3700 known species, native mainly to the tropical Americas, with several species found in the American subtropics and one in tropical west Africa, ...

, and is an important

pollinator A pollinator is an animal that moves pollen from the male anther of a flower to the female stigma of a flower. This helps to bring about fertilization of the ovules in the flower by the male gametes from the pollen grains. Insects are the maj ...

of the

cactus A cactus (, or less commonly, cactus) is a member of the plant family Cactaceae, a family comprising about 127 genera with some 1750 known species of the order Caryophyllales. The word ''cactus'' derives, through Latin, from the Ancient Greek ...

'' Weberocereus tunilla''. It has also been observed feeding on ''

Ceiba pentandra ''Ceiba pentandra'' is a tropical tree of the order Malvales and the family Malvaceae (previously emplaced in the family Bombacaceae), native to Mexico, Central America and the Caribbean, northern South America, and (as the variety ''C. pentandr ...

'', '' Matisia ochrocalyx'', '' Matisia bracteolosa'', ''

Quararibea cordata ''Quararibea cordata'', the South American sapote or chupa-chupa, is a large, semi-deciduous, fruit tree (up to 45m in height), native to Amazon rainforest vegetation in Brazil, Colombia, Ecuador, and Peru. It bears orange-yellow fruit which ar ...

'', '' Quararibea parvifolia'', ''

Ochroma pyramidale ''Ochroma pyramidale'', commonly known as the balsa tree, is a large, fast-growing tree native to the Americas. It is the sole member of the genus ''Ochroma''. The tree is famous for its wide usage in woodworking, with the name ''balsa'' being ...

'', '' Markea neurantha'', ''

Mucuna holtonii ''Mucuna holtonii'' is a species of plant in the bean family, which is pollinated by bats. Bats are able to detect if the flowers have nectar using echolocation.*D. von Helversen and O. von Helversen. "Object recognition by echolocation: a nec ...

'', '' Calyptrogyne ghiesbreghtiana'', and species in the genus ''

Musa Musa may refer to: Places *Mūša, a river in Lithuania and Latvia * Musa, Azerbaijan, a village in Yardymli Rayon * Musa, Iran, a village in Ilam Province *Musa, Chaharmahal and Bakhtiari, Iran *Musa, Kerman, Iran * Musa, Bukan, West Azerbaijan ...

'' and the family

Urticaceae The Urticaceae are a family, the nettle family, of flowering plants. The family name comes from the genus ''Urtica''. The Urticaceae include a number of well-known and useful plants, including nettles in the genus ''Urtica'', ramie (''Boehmeri ...

. In Mexico, the majority of stomach content is pollen from ''

Lonchocarpus ''Lonchocarpus'' is a plant genus in the legume family (biology), family (Fabaceae). The species are called lancepods due to their fruit resembling an ornate lance tip or a few beads on a string. ''Cubé'' resin is produced from the roots of '' ...

'' plants. The presence of

Melastomataceae Melastomataceae is a family of dicotyledonous flowering plants found mostly in the tropics (two-thirds of the genera are from the New World tropics) comprising c. 175 genera and c. 5115 known species. Melastomes are annual or perennial herbs, sh ...

seeds in the

feces Feces ( or faeces), known colloquially and in slang as poo and poop, are the solid or semi-solid remains of food that was not digested in the small intestine, and has been broken down by bacteria in the large intestine. Feces contain a relati ...

of individuals from Guatemala suggests that the dark-long tongued bat may be a

seed disperser In Spermatophyte plants, seed dispersal is the movement, spread or transport of seeds away from the parent plant. Plants have limited mobility and rely upon a variety of dispersal vectors to transport their seeds, including both abiotic vectors, ...

there. In areas of Costa Rica where the bat is a seasonal visitor, it shares its feeding niche with the Commissaris’s long-tongued bat and Underwood’s long-tongued bat.

Distribution and habitat

The dark long-tongued bat is found from southern

Chiapas Chiapas (; Tzotzil language, Tzotzil and Tzeltal language, Tzeltal: ''Chyapas'' ), officially the Free and Sovereign State of Chiapas ( es, Estado Libre y Soberano de Chiapas), is one of the states that make up the Political divisions of Mexico, ...

in Mexico south through all of

. In South America, it if found in the Andean region of the Amazon versant from Venezuela,

Guyana Guyana ( or ), officially the Cooperative Republic of Guyana, is a country on the northern mainland of South America. Guyana is an indigenous word which means "Land of Many Waters". The capital city is Georgetown. Guyana is bordered by the ...

Suriname Suriname (; srn, Sranankondre or ), officially the Republic of Suriname ( nl, Republiek Suriname , srn, Ripolik fu Sranan), is a country on the northeastern Atlantic coast of South America. It is bordered by the Atlantic Ocean to the north ...

, and

French Guiana French Guiana ( or ; french: link=no, Guyane ; gcr, label=French Guianese Creole, Lagwiyann ) is an overseas departments and regions of France, overseas department/region and single territorial collectivity of France on the northern Atlantic ...

to the

Amazon Basin The Amazon basin is the part of South America drained by the Amazon River and its tributaries. The Amazon drainage basin covers an area of about , or about 35.5 percent of the South American continent. It is located in the countries of Bolivi ...

in Brazil. It occurs on the

Pacific slope The Pacific Slope describes geographic regions in North American, Central American, and South American countries that are west of the continental divide and slope down to the Pacific Ocean. In North America, the Rocky Mountains mark the eastern bo ...

of the Andes in Venezuela, Colombia, and western Ecuador, and on the Amazonia slope in

and

. It is found at elevations of up to . The dark long-tongued bat mainly occurs in old-growth vegetation such as rainforest,

savanna A savanna or savannah is a mixed woodland-grassland (i.e. grassy woodland) ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to ...

s, and

tropical deciduous forest The tropical and subtropical dry broadleaf forest is a habitat type defined by the World Wide Fund for Nature and is located at tropical and subtropical latitudes. Though these forests occur in climates that are warm year-round, and may receive ...

. However, it is also known to inhabit dry shrubland in French Guiana, disturbed habitat, open grasslands, and buildings in Nicaragua, fruit groves in Panama, logged forest in Venezuela, open clearings in Peru, banana and rubber groves in Guatemala, and mosaic forest in Brazil. Foliage is used as a day roost in Costa Rica.

Status

The dark long-tongued bat is listed as being of

by the

IUCN The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natu ...

on the

IUCN Red List The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biol ...

, due to its widespread distribution and presence in protected areas. However, the species is naturally uncommon where it occurs. It is listed as being vulnerable on the Red List of Ecuadorian Mammals. Threats to the bat include

deforestation Deforestation or forest clearance is the removal of a forest or stand of trees from land that is then converted to non-forest use. Deforestation can involve conversion of forest land to farms, ranches, or urban use. The most concentrated d ...

and

habitat fragmentation Habitat fragmentation describes the emergence of discontinuities (fragmentation) in an organism's preferred environment (habitat), causing population fragmentation and ecosystem decay. Causes of habitat fragmentation include geological processes ...

References

{{Taxonbar, from=Q305079 Phyllostomidae Bats of Central America Bats of South America Bats of Brazil Bats of Mexico Mammals of Bolivia Mammals of Colombia Mammals of Ecuador Mammals of French Guiana Mammals of Guyana Mammals of Peru Mammals of Suriname Mammals of Venezuela Mammals described in 1895 Taxa named by Oldfield Thomas