Haplognathia Simplex
''Haplognathia'' is a genus of worms belonging to the family Haplognathiidae. The species of this genus are found in Europe, Northern Africa, and the Pacific Ocean. Species: *''Haplognathia asymmetrica'' *''Haplognathia belizensis'' *''Haplognathia filum'' *''Haplognathia gubbarnorum'' *''Haplognathia lunulifera'' *''Haplognathia rosea'' *''Haplognathia ruberrima'' *''Haplognathia rubromaculata'' *''Haplognathia rufa'' *''Haplognathia simplex'' References

{{Taxonbar, from=Q2320845 Gnathostomulida Platyzoa genera ...
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Worm
Worms are many different distantly related bilateria, bilateral animals that typically have a long cylindrical tube-like body, no limb (anatomy), limbs, and usually no eyes. 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 parasitism, 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 Carl Linnaeus, 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 ''wikt:wyrm, wyrm''. Most animals called "worms" are invertebrates, but the term is also use ...
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