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Ophryotrocha scutellus
Ophryotrocha scutellus, 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.〕 Live observation of this species in aquarium experiments indicate a bacterial diet. ''O. scutellus'' is named after the Latin ''scutella'' for “saucer”, due to its flattened disc-like head. ''Ophryotrocha scutellus'' has a dorsoventrally rounded and flattened prostomium, similar to ''O. platykephale'', from which this species differs in jaw morphology, the form of its parapodia and the absence of branchiae.〔
==Description==
Its body shape is elongated, with a uniform width for the majority of its length. It is transparent in colour, white eggs being visible in females. It lacks eyes; it possesses long, cirriform paired antennae, with palps being inserted lateroventrally on the prostomium. Its mandibles are rod-like, and lack serration. Its maxillae have seven pairs of free denticles. It counts with two peristomial segments without setae. It counts with a cirriform acicular lobe, its supraacicular chaetae being simple, while the subacicular chaetae are compound, and exhibit serrated blades. Its pygidium has a terminal anus, with two pygidial cirri that measure as long as its antennae and shows a short appendage ventrally.〔
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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