Polyeunoa

Polyeunoa
Scientific classification
Kingdom:	Animalia
Phylum:	Annelida
Class:	Polychaeta
Order:	Phyllodocida
Family:	Polynoidae
Subfamily:	Polynoinae
Genus:	Polyeunoa; McIntosh, 1885
Type species
	Polyeunoa laevis McIntosh, 1885[1];

Polyeunoa is a genus of marine annelids in the family Polynoidae (scale worms). The genus contains a two species (P. laevis and P. maculata), with only P. laevis being widespread and abundant in the Southern Ocean.[2]

Description

Species of Polyeunoa are long-bodied with 70 or more segments and at least 15 pairs of elytra. The elytra leave part of the mid-dorsal body and most posterior segments uncovered. Cephalic peaks are absent or very small on the prostomium and the lateral antennae are inserted beneath the median antenna. The notochaetae are few and about as thick as the neurochaetae, which are numerous. Both unidentate and bidentate forms of chaetae are present.[3][4]

Taxonomic comments

Polyeunoa leavis is one of several scale worms found in the Southern Oceans which are similar and have been confused in the past. Taxonomic work has proved useful in helping distinguish these taxa and provided tabular comparisons to help identify them from one another[4]

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References

Read, G.; Fauchald, K. (Ed.) (2020). World Polychaeta database. Polyeunoa McIntosh, 1885. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=174389
McIntosh, William C. [as M'Intosh]. (1885). Report on the Annelida Polychaeta collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873–76. Zoology. 12 (part 34): i-xxxvi, 1-554, pl. 1-55, 1A-39A, & Annelida stations map., available online at https://biodiversitylibrary.org/page/50688426
Fauchald, K.; Wilson, R.S. (2003). "Polynoidae (Polychaeta)-A DELTA database of genera, and Australian species". In R.S. Wilson; P.A. Hutchings; C. J. Glasby (eds.). Polychaetes: An Interactive Identification Guide. Melbourne: CSIRO Publishing.
Barnich R, Gambi C, Fiege D (2012) Revision of the genus Polyeunoa McIntosh, 1885 (Polychaeta, Polynoidae). Zootaxa 3523: 25–38. https://doi.org/10.11646/zootaxa.3523.1.3.

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[1] Read, G.; Fauchald, K. (Ed.) (2020). World Polychaeta database. Polyeunoa McIntosh, 1885. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=174389

[Tosh-2] McIntosh, William C. [as M'Intosh]. (1885). Report on the Annelida Polychaeta collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873–76. Zoology. 12 (part 34): i-xxxvi, 1-554, pl. 1-55, 1A-39A, & Annelida stations map., available online at https://biodiversitylibrary.org/page/50688426

[3] Fauchald, K.; Wilson, R.S. (2003). "Polynoidae (Polychaeta)-A DELTA database of genera, and Australian species". In R.S. Wilson; P.A. Hutchings; C. J. Glasby (eds.). Polychaetes: An Interactive Identification Guide. Melbourne: CSIRO Publishing.

[barnich-4] Barnich R, Gambi C, Fiege D (2012) Revision of the genus Polyeunoa McIntosh, 1885 (Polychaeta, Polynoidae). Zootaxa 3523: 25–38. https://doi.org/10.11646/zootaxa.3523.1.3.