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Pterognathia
''Pterognathia'' is a genus of worms belonging to the family Pterognathiidae. The genus has almost cosmopolitan distribution. Species Species: *''Pterognathia alcicornis'' *''Pterognathia atrox'' *''Pterognathia crocodilus'' References {{Taxonbar, from=Q2340110 Gnathostomulida Platyzoa genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pterognathia Alcicornis
''Pterognathia'' is a genus of worms belonging to the family Pterognathiidae. The genus has almost cosmopolitan distribution. Species Species: *'' Pterognathia alcicornis'' *''Pterognathia atrox'' *''Pterognathia crocodilus ''Pterognathia'' is a genus of worms belonging to the family Pterognathiidae. The genus has almost cosmopolitan distribution In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of t ...'' References {{Taxonbar, from=Q2340110 Gnathostomulida Platyzoa genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pterognathia Atrox
''Pterognathia'' is a genus of worms belonging to the family Pterognathiidae. The genus has almost cosmopolitan distribution. Species Species: *'' Pterognathia alcicornis'' *'' Pterognathia atrox'' *''Pterognathia crocodilus ''Pterognathia'' is a genus of worms belonging to the family Pterognathiidae. The genus has almost cosmopolitan distribution In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of t ...'' References {{Taxonbar, from=Q2340110 Gnathostomulida Platyzoa genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pterognathia Crocodilus
''Pterognathia'' is a genus of worms belonging to the family Pterognathiidae. The genus has almost cosmopolitan distribution In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The ext .... Species Species: *'' Pterognathia alcicornis'' *'' Pterognathia atrox'' *'' Pterognathia crocodilus'' References {{Taxonbar, from=Q2340110 Gnathostomulida Platyzoa genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pterognathiidae
Pterognathiidae is a family of worms belonging to the order Filospermoidea Filospermoidea is an order within the phylum Gnathostomulida. Filospermoids are generally longer than gnathostomulids in the order Bursovaginoidea, and have an elongate rostrum. It lives in North America, off the coasts of the southern United Sta .... Genera: * '' Cosmognathia'' Sterrer, 1991 * '' Pterognathia'' Sterrer, 1966 References {{Taxonbar, from=Q2338534 Gnathostomulida Platyzoa families ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Worm
Worms are many different distantly related bilateral animals that typically have a long cylindrical tube-like body, no limbs, and no eyes (though not always). Worms vary in size from microscopic to over in length for marine polychaete worms (bristle worms); for the African giant earthworm, '' Microchaetus rappi''; and for the marine nemertean worm (bootlace worm), '' Lineus longissimus''. Various types of worm occupy a small variety of parasitic niches, living inside the bodies of other animals. Free-living worm species do not live on land but instead live in marine or freshwater environments or underground by burrowing. In biology, "worm" refers to an obsolete taxon, '' vermes'', used by Carolus Linnaeus and Jean-Baptiste Lamarck for all non-arthropod invertebrate animals, now seen to be paraphyletic. The name stems from the Old English word '' wyrm''. Most animals called "worms" are invertebrates, but the term is also used for the amphibian caecilians and the slow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosmopolitan Distribution
In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The extreme opposite of a cosmopolitan species is an endemic one, being found only in a single geographical location. Qualification The caveat “in appropriate habitat” is used to qualify the term "cosmopolitan distribution", excluding in most instances polar regions, extreme altitudes, oceans, deserts, or small, isolated islands. For example, the housefly is highly cosmopolitan, yet is neither oceanic nor polar in its distribution. Related terms and concepts The term pandemism also is in use, but not all authors are consistent in the sense in which they use the term; some speak of pandemism mainly in referring to diseases and pandemics, and some as a term intermediate between endemism and cosmopolitanism, in effect regarding pandemism as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gnathostomulida
Gnathostomulids, or jaw worms, are a small phylum of nearly microscopic marine animals. They inhabit sand and mud beneath shallow coastal waters and can survive in relatively anoxic environments. They were first recognised and described in 1956. Anatomy Most gnathostomulids measure in length. They are often slender to thread-like worms, with a generally transparent body. In many Bursovaginoidea, one of the major group of gnathostomulids, the neck region is slightly narrower than the rest of the body, giving them a distinct head. Like flatworms they have a ciliated epidermis, but in contrast to flatworms, they have one cilium per cell. The cilia allow the worms to glide along in the water between sand grains, although they also use muscles, allowing the body to twist or contract, for movement. They have no body cavity, and no circulatory or respiratory system. The nervous system is simple, and restricted to the outer layers of the body wall. The only sense organs are modified ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
