Hermadionella

Hermadionella is a genus of marine polychaete worms belonging to the family Polynoidae, the scaleworms. Hermadionella contains 3 species which are known from the north-west Pacific and Arctic Oceans from the intertidal to depths of about 200 m.[2]

Hermadionella
Scientific classification
Kingdom: Animalia
Phylum: Annelida
Class: Polychaeta
Order: Phyllodocida
Family: Polynoidae
Genus: Hermadionella
Uschakov, 1982
Type species
Hermadionella truncata (Moore, 1902)[1]

Description

Hermadionella are long-bodied scale worms with 50–60 or more segments and 15 pairs of elytra; the posterior-most 15–20 or more segments are thus not covered by elytra. The prostomium is bilobed and rounded anteriorly, lacking acute cephalic peaks. The lateral antennae are inserted ventrally, beneath median antenna and the antennal styles are covered with slender papillae. The neuropodial lobe is elongate, tapering to a slightly rounded tip. The notochaetae have truncate tips and are distinctly thicker than the neurochaetae. Neurochaetae with simple or bidentate tips may both be present.

Hermadionella is distinguished from the similar genus Hermadion by having a longer body (Hermadion have fewer than 50 segments) and notochaetae with truncate tips, which are absent in Hermadion.[2][3]

Species

As of October 2020, Hermadionella contains three species:[1]

References
  1. Read, G.; Fauchald, K. (Ed.) (2020). World Polychaeta database. Hermadionella Uschakov, 1982. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=129492
  2. Bock G, Fiege D, Barnich R (2010) Revision of Hermadion Kinberg, 1856, with a redescription of Hermadion magalhaensi Kinberg, 1856, Adyte hyalina (G.O. Sars, 1873) n. comb. and Neopolynoe acanellae (Verrill, 1881) n. comb. (Polychaeta: Polynoidae). Zootaxa 2554: 45–61. https://doi.org/10.11646/zootaxa.2554.1.4.
  3. Uschakov, Pavel Vladimirovich. 1982. [Polychaetes of the Suborder Aphroditiformia of the Arctic Ocean and the Northwestern Part of the Pacific, Families Aphroditidae and Polynoidae]. 1-272. FAUNA SSSR, Mnogoshchetinkovyye chervi (Fauna of the USSR, Polychaeta). Moscow., available online at http://www.annelida.net/translation/transl.html


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