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Cephalotrichidae
Cephalothricidae is a family of worms belonging to the order Palaeonemertea. Genera: * '' Astemma'' Örsted, 1843 * '' Balionemertes'' Sundberg, Gibson & Olsson, 2003 * '' Cephalothrix'' Örsted, 1843 References Palaeonemertea Nemertea families {{nemertean-stub ...
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Palaeonemertea
Palaeonemertea is a class of primitive nemertean worm. It may be para- or polyphyletic, consisting of three to five clades and totalling about 100 species. These worms have several apparently simple features and, as their name suggests, they are often considered to be the most primitive nemerteans. The primary body-wall musculature consists of an outer circular layer overlying a longitudinal layer. The group includes genera such as '' Cephalothrix'' in which the nerve cords are inside the body-wall longitudinal muscle, and ''Tubulanus ''Tubulanus'' is a genus of primitive nemertean worms in the order Palaeonemertea. Species The World Register of Marine Species includes the following species in the genus: * '' Tubulanus albocinctus'' (Coe, 1904) * '' Tubulanus annulatus'' (Mo ...'', in which the nerve cords are between the outer circular muscle and the epidermis. Tubulanids are commonly encountered in rocky areas of intertidal zones in the northern hemisphere. They are often ...
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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 slowworm '' A ...
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Astemma (worm)
''Monactis'' is a genus of South American flowering plants in the tribe Heliantheae within the family Asteraceae. ; SpeciesFlann, C (ed) 2009+ Global Compositae Checklist
The Plant List search for Monactis
/ref> ; formerly included ''Monactis subdeltoidea'' B.L.Rob. - ''
Kingianthus paniculatus ''Kingianthus paniculatus'' is a species of flowering plant in the family Asteraceae. It is found only in Ecuador. Its natural h ...
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Cephalothrix
''Cephalothrix'' is a genus of nemerteans belonging to the family Cephalothricidae. The genus has 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: *'' Cephalothrix adriatica'' *'' Cephalothrix alba'' *'' Cephalothrix aliena'' References Palaeonemertea Nemertea genera {{nemertean-stub ...
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