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Ophryotrocha craigsmithi
Ophryotrocha craigsmithi, is a species of polychaete worm.〔Wiklund, Helena, Adrian G. Glover, and Thomas G. Dahlgren. "Three new species of Ophryotrocha (Annelida: Dorvilleidae) from a whale-fall in the North-East Atlantic." Zootaxa 2228 (2009): 43-56.〕 ''O. craigsmithi'' is named after Craig R. Smith. This species is similar to ''Palpiphitime lipovskyae'' and ''O. Platykephale'', among others, in having branchial structures dorsally and ventrally. It differs from ''O. platykephale'' in the shape of its prostomium and parapodia. ''Palpiphitime lipovskyae'' has jaws of both P- and K-type, while no specimens of ''O. craigsmithi'' have been found with K-type jaws thus far. ''Ophryotrocha craigsmithi'' differs from ''P. lipovskyae'' genetically, but also by the presence of a prominent ventral chaetal lobe with a bulging simple chaeta in the former.〔
==Description==
It has a pale red or transparent colour, with red branchial structures on its dorsal and ventral sides. It has an elongated body, tapering at its posterior end. Its prostomium has digitiform paired antennae inserted dorsally. Its palps are papilliform and with palpophores, inserted laterally on its prostomium. It possesses no eyes, its mandibles being L-shaped, counting with anterior serration. Its maxillae exhibits 7 free denticles. It also counts with two peristomial segments without setae. Its parapodia has dorsal ventral cirri, with simple supraacicular chaetae and compound subacicular chaetae with serrated blades. Its pygidium has a terminal anus and two pygidial cirri.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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