Hermadionella nipponicus
{{Short description|Species of annelid worm}}
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|genus=Hermadionella
|species= nipponicus
|authority=(Imajima & Hartman, 1964)Read, G.; Fauchald, K. (Ed.) (2020). World Polychaeta database. Hermadionella nipponicus (Imajima & Hartman, 1964). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1062564
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Hermadionella nipponicus is a scale worm known from Japan in the north-west Pacific Ocean from the intertidal zone.Imajima, Minoru & Hartman, Olga. (1964). The polychaetous annelids of Japan. Occasional Papers of the Allan Hancock Foundation. 26(1-2): 1-452 [issued in 2 parts]., available online at http://digitallibrary.usc.edu/cdm/ref/collection/p15799coll82/id/18946
Description
Hermadionella nipponicus has up to about 64 segments with 15 pairs of elytra, which bear a fringe of papillae. The lateral antennae are positioned ventrally on the prostomium, directly beneath the median antenna (almost completely obscured in dorsal view). The prostomium also bears a pair of acute anterior projections on the anterior margin. Notochaetae are about as thick as the neurochaetae, and the neurochaetae bear bidentate tips{{Cite book| publisher = CSIRO Publishing|editor= R.S. Wilson |editor2=P.A. Hutchings |editor3=C. J. Glasby | last1 = Fauchald| first1 = K.| last2 = Wilson| first2 = R.S.| title = Polychaetes: An Interactive Identification Guide| chapter = Polynoidae (Polychaeta)-A DELTA database of genera, and Australian species| location = Melbourne| date = 2003}}