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Two-pronged Bristletail
The order Diplura ("two-pronged bristletails") is one of three orders of non-insect hexapods within the class Entognatha (alongside Collembola (springtails) and Protura). The name "diplura", or "two tails", refers to the characteristic pair of caudal appendages or filaments at the terminal end of the body. Around 800 species of diplurans have been described, of which around 170 occur in North America and 12 in Great Britain. Anatomy Diplurans are typically long, with most falling between . However, some species of ''Japyx'' may reach . They have no eyes and, apart from the darkened cerci in some species, they are unpigmented. Diplurans have long antennae with 10 or more bead-like segments projecting forward from the head. The abdomens of diplurans bear eversible vesicles, which seem to absorb moisture from the environment and help with the animal's water balance. The body segments themselves may display several types of setae, or scales and setae. Diplurans possess a char ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Campodea
''Campodea'' is a genus of small, white, bristle-tailed arthropods in the order Diplura. The best known species, ''Campodea staphylinus'', has a wide distribution across much of Europe. It lives in damp places under stones, fallen trees, or in rotten wood and leaves. Although blind, it immediately crawls away on exposure to the light into the nearest crevice or other sheltered spot, feeling the way with its antennae. There are at least 130 described species in ''Campodea''. See also * List of Campodea species This is a list of 134 species in ''Campodea'', a genus of two-pronged bristletails in the family Campodeidae. ''Campodea'' species * '' Campodea alluvialis'' Sendra * '' Campodea anacua'' Wygodzinsky, 1944 * '' Campodea anae'' Sendra & Teruel * ' ... References Further readingFauna Europaea entry for ''Campodea'' Retrieved January 26, 2006.Fauna Europaea entry for ''Campodea staphylinus'' Retrieved January 26, 2006. External links * Diplura {{Diplura-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Massey University
Massey University ( mi, Te Kunenga ki Pūrehuroa) is a university based in Palmerston North, New Zealand, with significant campuses in Albany and Wellington. Massey University has approximately 30,883 students, 13,796 of whom are extramural or distance-learning students, making it New Zealand's second largest university when not counting international students. Research is undertaken on all three campuses, and more than 3,000 international students from over 100 countries study at the university. Massey University is the only university in New Zealand offering degrees in aviation, dispute resolution, veterinary medicine, and nanoscience. Massey's veterinary school is accredited by the American Veterinary Medical Association and is recognised in the United States, Australia, Canada, and Britain. Massey's agriculture programme is the highest-ranked in New Zealand, and 19th in Quacquarelli Symonds' (QS) world university subject rankings. Massey's Bachelor of Aviation (Air Transp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Somite
The somites (outdated term: primitive segments) are a set of bilaterally paired blocks of paraxial mesoderm that form in the embryonic stage of somitogenesis, along the head-to-tail axis in segmented animals. In vertebrates, somites subdivide into the dermatomes, myotomes, sclerotomes and syndetomes that give rise to the vertebrae of the vertebral column, rib cage, part of the occipital bone, skeletal muscle, cartilage, tendons, and skin (of the back). The word ''somite'' is sometimes also used in place of the word '' metamere''. In this definition, the somite is a homologously-paired structure in an animal body plan, such as is visible in annelids and arthropods. Development The mesoderm forms at the same time as the other two germ layers, the ectoderm and endoderm. The mesoderm at either side of the neural tube is called paraxial mesoderm. It is distinct from the mesoderm underneath the neural tube which is called the chordamesoderm that becomes the notochord. The pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cercus
Cerci (singular cercus) are paired appendages on the rear-most segments of many arthropods, including insects and symphylans. Many forms of cerci serve as sensory organs, but some serve as pinching weapons or as organs of copulation. In many insects, they simply may be functionless vestigial structures. In basal arthropods, such as silverfish, the cerci originate from the eleventh abdominal segment. As segment eleven is reduced or absent in the majority of arthropods, in such cases, the cerci emerge from the tenth abdominal segment. It is not clear that other structures so named are homologous. In the Symphyla they are associated with spinnerets. Morphology and functions Most cerci are segmented and jointed, or filiform (threadlike), but some take very different forms. Some Diplura, in particular ''Japyx'' species, have large, stout forcipate (pincer-like) cerci that they use in capturing their prey. The Dermaptera, or earwigs, are well known for the forcipate cerci that most o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seta
In biology, setae (singular seta ; from the Latin word for "bristle") are any of a number of different bristle- or hair-like structures on living organisms. Animal setae Protostomes Annelid setae are stiff bristles present on the body. They help, for example, earthworms to attach to the surface and prevent backsliding during peristaltic motion. These hairs make it difficult to pull a worm straight from the ground. Setae in oligochaetes (a group including earthworms) are largely composed of chitin. They are classified according to the limb to which they are attached; for instance, notosetae are attached to notopodia; neurosetae to neuropodia. Crustaceans have mechano- and chemosensory setae. Setae are especially present on the mouthparts of crustaceans and can also be found on grooming limbs. In some cases, setae are modified into scale like structures. Setae on the legs of krill and other small crustaceans help them to gather phytoplankton. It captures them and allows th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Balance
The law of water balance states that the inflows to any water system or area is equal to its outflows plus change in storage during a time interval. In hydrology, a water balance equation can be used to describe the flow of water in and out of a system. A system can be one of several hydrological or water domains, such as a column of soil, a drainage basin, an irrigation area or a city. Water balance can also refer to the ways in which an organism maintains water in dry or hot conditions. It is often discussed in reference to plants or arthropods, which have a variety of water retention mechanisms, including a lipid waxy coating that has limited permeability. Equation for a basin A general water balance equation is: : where : is precipitation : is streamflow : is evapotranspiration : is the change in storage (in soil or the bedrock / groundwater) This equation uses the principles of conservation of mass in a closed system, whereby any water entering a system (via precipitatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
McMaster University
McMaster University (McMaster or Mac) is a public research university in Hamilton, Ontario, Canada. The main McMaster campus is on of land near the residential neighbourhoods of Ainslie Wood and Westdale, adjacent to the Royal Botanical Gardens. It operates six academic faculties: the DeGroote School of Business, Engineering, Health Sciences, Humanities, Social Science, and Science. It is a member of the U15, a group of research-intensive universities in Canada. The university bears the name of William McMaster, a prominent Canadian senator and banker who bequeathed C$900,000 to its founding. It was incorporated under the terms of an act of the Legislative Assembly of Ontario in 1887, merging the Toronto Baptist College with Woodstock College. It opened in Toronto in 1890. Inadequate facilities and the gift of land in Hamilton prompted its relocation in 1930. The Baptist Convention of Ontario and Quebec controlled the university until it became a privately chartered, pu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bead
A bead is a small, decorative object that is formed in a variety of shapes and sizes of a material such as stone, bone, shell, glass, plastic, wood, or pearl and with a small hole for threading or stringing. Beads range in size from under to over in diameter. Beads represent some of the earliest forms of jewellery, with a pair of beads made from ''Nassarius'' sea snail shells dating to approximately 100,000 years ago thought to be the earliest known example. Beadwork is the art or craft of making things with beads. Beads can be woven together with specialized thread, strung onto thread or soft, flexible wire, or adhered to a surface (e.g. fabric, clay). Types of beads Beads can be divided into several types of overlapping categories based on different criteria such as the materials from which they are made, the process used in their manufacturing, the place or period of origin, the patterns on their surface, or their general shape. In some cases, such as millefiori and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antenna (biology)
Antennae ( antenna), sometimes referred to as "feelers", are paired appendages used for sensing in arthropods. Antennae are connected to the first one or two segments of the arthropod head. They vary widely in form but are always made of one or more jointed segments. While they are typically sensory organs, the exact nature of what they sense and how they sense it is not the same in all groups. Functions may variously include sensing touch, air motion, heat, vibration (sound), and especially smell or taste. Antennae are sometimes modified for other purposes, such as mating, brooding, swimming, and even anchoring the arthropod to a substrate. Larval arthropods have antennae that differ from those of the adult. Many crustaceans, for example, have free-swimming larvae that use their antennae for swimming. Antennae can also locate other group members if the insect lives in a group, like the ant. The common ancestor of all arthropods likely had one pair of uniramous (unbranched ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japyx
''Japyx'' is a genus of diplurans belonging to the family Japygidae. These eyeless, predatory hexapods largely shun direct sunlight, remaining under stones and among detritus In biology, detritus () is dead particulate organic material, as distinguished from dissolved organic material. Detritus typically includes the bodies or fragments of bodies of dead organisms, and fecal material. Detritus typically hosts commun ..., where they use pincer-like cerci to catch their tiny prey. Species * ''Japyx akiyamae'' (Silvestri, 1928) * ''Japyx albanica'' (Stach, 1922) * ''Japyx angulosus'' (Silvestri, 1918) * ''Japyx arnoldii'' (Ionescu, 1959) * ''Japyx barnardi'' (Silvestri, 1935) * ''Japyx beccarii'' (Silvestri, 1931) * ''Japyx beneserratus'' (Kuwayama, 1928) * ''Japyx biangulatus'' (Silvestri, 1931) * ''Japyx bidens'' (Cook, 1899) * ''Japyx biproductus'' (Silvestri, 1908) * ''Japyx bolivari'' (Silvestri, 1929) * ''Japyx brachycerus'' (Silvestri, 1930) * ''Japyx cavicola'' (Joseph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Campodeidae Sp
The Campodeidae are a family of hexapods belonging to the order Diplura. These pale, eyeless hexapods, the largest of which grow to around 12 mm in length, can be recognised by the two long, many-segmented cerci at the end of the abdomen. Abdominal spiracles are absent. There are at least 30 genera and 280 described species in Campodeidae. Genera These 30 genera belong to the family Campodeidae: * '' Campodea'' Westwood, 1842 * '' Campodella'' Silvestri, 1913 * '' Cestocampa'' Conde, 1955 * '' Clivocampa'' Allen, 1994 * '' Condeicampa'' Ferguson, 1996 * '' Edriocampa'' Silvestri, 1933 * '' Eumesocampa'' Silvestri, 1933 * '' Eutrichocampa'' Silvestri, 1902 * '' Haplocampa'' Silvestri, 1912 * '' Helladocampa'' Conde, 1984 * '' Hemicampa'' Silvestri, 1911 * '' Hystrichocampa'' Conde, 1948 * '' Juxtlacampa'' Wygodzinsky, 1944 * '' Lepidocampa'' Oudemans, 1890 * '' Libanocampa'' Condé, 1955 * '' Litocampa'' Silvestri, 1933 * '' Meiocampa'' Silvestri, 1933 * '' Metriocampa'' S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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