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Onychophoran
Onychophora (from grc, ονυχής, , "claws"; and , , "to carry"), commonly known as velvet worms (due to their velvety texture and somewhat wormlike appearance) or more ambiguously as peripatus (after the first described genus, ''Peripatus''), is a phylum of elongate, soft-bodied, many-legged panarthropods. In appearance they have variously been compared to worms with legs, caterpillars, and slugs. They prey upon other invertebrates, which they catch by ejecting an adhesive slime. Approximately 200 species of velvet worms have been described, although the true number of species is likely greater. The two extant families of velvet worms are Peripatidae and Peripatopsidae. They show a peculiar distribution, with the peripatids being predominantly equatorial and tropical, while the peripatopsids are all found south of the equator. It is the only phylum within Animalia that is wholly endemic to terrestrial environments, at least among extant members. Velvet worms are generally ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Panarthropoda
Panarthropoda is a proposed animal clade containing the extant phyla Arthropoda, Tardigrada (water bears) and Onychophora (velvet worms). Panarthropods also include extinct marine legged worms known as lobopodians ("Lobopodia"), a paraphyletic group where the last common ancestor and basal members ( stem-group) of each extant panarthropod phylum are thought to have risen. However the term "Lobopodia" is sometimes expanded to include tardigrades and onychophorans as well. Common characteristics of the Panarthropoda include a segmented body, paired ladder-like, ventral nervous system, and the presence of paired appendages correlated with body segments. Taxonomy Not all studies support the monophyly of Panarthropoda, but most do, including neuroanatomical, phylogenomic and palaeontological studies. At least a close relationship between onychophorans and arthropods is widely agreed upon, but the position of tardigrades is more controversial. Some phylogenomic studies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ontonychophora
Ontonychophora is an extinct order of onychophoran consisting of organisms with simple lobopods that lack terminal feet. It includes all fossil onychophorans except †''Cretoperipatus ''Cretoperipatus burmiticus'' is an extinct species of velvet worm that is known from Cretaceous Burmese amber approximately 100 million years old. It was found in Kachin state, Myanmar. Taxonomy The species can be assigned to one of the moder ...'', which is in the Euonychophora along with all remaining members of the phylum. Families :*† Helenodoridae *† Tertiapatoidea :*† Tertiapatidae :*† Succinipatopsidae References Onychophoran orders Prehistoric onychophorans Prehistoric animal orders {{paleo-protostome-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plicatoperipatus Jamaicensis
''Plicatoperipatus'' is a monospecific genus of velvet worm containing the single species ''Plicatoperipatus jamaicensis''. It is endemic to Jamaica. This species ranges from 25 mm to 65 mm in length. Males in this species have 35 pairs of legs; females have 43 pairs, the maximum number found in the phylum Onychophora. Conservation This species is listed as Near Threatened by 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 .... References Further reading * * Endemic fauna of Jamaica IUCN-assessed onychophorans Monotypic protostome genera Onychophorans of tropical America Onychophoran genera Taxonomy articles created by Polbot {{Onychophora-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helenodoridae
''Helenodora'' is an extinct basal onychophoran or lobopodian genus known from the Carboniferous Carbondale Formation of Illinois Illinois ( ) is a state in the Midwestern United States. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. Other smaller metropolitan areas include, Peoria and Roc .... The only known species described is ''H. inopinata''. The ecology of this animal is not well known, but it is thought that it may have lived on land and/or underwater. References External links * Onychophorans of temperate America Onychophoran genera Prehistoric onychophorans Prehistoric protostome genera Carboniferous invertebrates Carboniferous United States Fossils of the United States Fossil taxa described in 1980 {{Onychophore-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthropoda
Arthropods (, (gen. ποδός)) are invertebrate animals with an exoskeleton, a Segmentation (biology), segmented body, and paired jointed appendages. Arthropods form the phylum Arthropoda. They are distinguished by their jointed limbs and Arthropod cuticle, cuticle made of chitin, often Mineralization (biology), mineralised with calcium carbonate. The arthropod body plan consists of segments, each with a pair of appendages. Arthropods are bilaterally symmetrical and their body possesses an exoskeleton, external skeleton. In order to keep growing, they must go through stages of moulting, a process by which they shed their exoskeleton to reveal a new one. Some species have wings. They are an extremely diverse group, with up to 10 million species. The haemocoel, an arthropod's internal cavity, through which its haemolymph – analogue of blood – circulates, accommodates its interior Organ (anatomy), organs; it has an open circulatory system. Like their exteriors, the internal or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euonychophora
Euonychophora is an order of Onychophora representing all living onychophorans; the Peripatidae (including the fossil †''Cretoperipatus ''Cretoperipatus burmiticus'' is an extinct species of velvet worm that is known from Cretaceous Burmese amber approximately 100 million years old. It was found in Kachin state, Myanmar. Taxonomy The species can be assigned to one of the moder ...'') and Peripatopsidae. Their feet possess a pair of claws and a pad, and are covered with pustules. All remaining onychophorans are fossil species in the order Ontonychophora. References External links * Onychophoran orders {{Onychophore-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tertiapatoidea
Tertiapatoidea is an extinct superfamily of onychophorans consisting of two monospecific families, Tertiapatidae, and Succinipatopsidae ''Succinipatopsis'' is an extinct onychophoran genus known from Eocene-aged Baltic amber The Baltic region is home to the largest known deposit of amber, called Baltic amber or succinite. It was produced sometime during the Eocene epoch, but ..., neither of which preserve feet or claws at the ends of their legs. References Onychophoran superfamilies Prehistoric onychophorans Prehistoric animal superfamilies {{Paleo-protostome-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tertiapatidae
''Tertiapatus'' is an extinct genus of onychophorans known from Dominica Dominica ( or ; Kalinago: ; french: Dominique; Dominican Creole French: ), officially the Commonwealth of Dominica, is an island country in the Caribbean. The capital, Roseau, is located on the western side of the island. It is geographically ...n amber deposits. The only known species described is ''Tertiapatus dominicanus''. References Prehistoric onychophorans Onychophorans of tropical America Onychophoran genera Monotypic protostome genera Prehistoric protostome genera Taxa named by George Poinar Jr. {{Onychophora-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Succinipatopsidae
''Succinipatopsis'' is an extinct onychophoran genus known from Eocene-aged Baltic amber The Baltic region is home to the largest known deposit of amber, called Baltic amber or succinite. It was produced sometime during the Eocene epoch, but exactly when is controversial. It has been estimated that these forests created more than 1 .... The only known species described is ''Succinipatopsis balticus''. References Monotypic protostome genera Prehistoric onychophorans Onychophoran genera Onychophorans of Europe Prehistoric protostome genera Baltic amber Fossil taxa described in 2000 Taxa named by George Poinar Jr. {{Onychophora-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tardigrada
Tardigrades (), known colloquially as water bears or moss piglets, are a phylum of eight-legged segmented micro-animals. They were first described by the German zoologist Johann August Ephraim Goeze in 1773, who called them Kleiner Wasserbär ("little water bear"). In 1777, the Italian biologist Lazzaro Spallanzani named them Tardigrada (), which means "slow steppers". They have been found in diverse regions of Earth's biospheremountaintops, the deep sea, tropical rainforests, and the Antarctic. Tardigrades are among the most resilient animals known, with individual species able to survive extreme conditions – such as exposure to extreme temperatures, extreme pressures (both high and low), air deprivation, radiation, dehydration, and starvation – that would quickly kill most other known forms of life. Tardigrades have survived exposure to outer space. There are about 1,300 known species in the phylum Tardigrada, a part of the superphylum Ecdysozoa consisting of an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peripatopsidae
Peripatopsidae is one of the two living velvet worm families. Description The Peripatopsidae exhibit relatively many characteristics that are perceived as original or "primitive" with respect to the Peripatidae. The number of leg pairs in this family range from as few as 13 (in '' Ooperipatellus nanus'') to as many as 29 (in '' Paraperipatus papuensis''). Behind or between the last leg pair is the genital opening (gonopore). Both oviparous and ovoviviparous, as well as genuinely viviparous, species exist, although the Peripatopsidae essentially lack a placenta. Distribution The distribution of the Peripatopsidae is circumaustral; in particular, they inhabit Australasia, South Africa and Chile. Genera The family contains the following genera: * ''Acanthokara'' Reid, 1996 * '' Aethrikos'' Reid, 1996 * ''Aktinothele'' Reid, 1996 * '' Anoplokaros'' Reid, 1996 * '' Austroperipatus'' Baehr, 1977 * ''Baeothele'' Reid, 1996 * '' Centrorumis'' Reid, 1996 * '' Cephalofovea'' Ruhberg et ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
