Platynereis abnormis   (Horst,  1924) (Marine Worm)
Organism information awaits expert curation
Class: Polychaeta

Size: Male Heteronereis, 10 mm.

Proboscis: Group I=0; II=a small concave row of paragnaths; III=0, IV=a crescentic row of paragnaths; V=0; VI=a triangular row of paragnaths; VII-VIII=five small, transverse groups of paragnaths, three of them in the median part and one on each side. Tentacular cirri long. A very long dorsal cirrus on the 7th setigerous segment. Falcigerous setae with sickle-shaped terminal pieces bent in the form of a hook with a dorsal prominence. Posterior dorsal homogomph falcigerous bristles.
The atocous specimens resemble Pl. dumerilii except in the characteristic, very long, dorsal cirrus of the 7th setigerous segment. The falcigers are also alike. The mutation of the feet occurs about the 14th to 15th feet in the male and 16th in the female, according to Augener. In Heteronereis stages from Trincomali he noticed three regions; an anterior of 14 segments, with long cirrus on the seventh, a middle one of 43, and a posterior, atocous, of 11 segments. Moreover, he mentions two other long filiform cirri on the eighth segment of the posterior region.

Synonym (s)
Nereis (Lycoris) abnormis Horst, 1924
Nereis abnormis Fauvel, 1951 b
Nereis abnormis Hartman, 1974 b
Nereis abnormis Horst, 1924
Platynereis abnormis Fauvel, 1932
Nereis (Lycoris) abnormis Horst, 1924
(Objective synonym)

Common Name (s)
Economic Importance and Threats



• Tamil Nadu, Pamban INDIA
• Palk Bay INDIA

Literature Source(s)
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Wehe, T and Fiege, D (2002) Annotated checklist of the polychaete species of the seas surrounding the Arabian Peninsula: Red Sea, Gulf of Aden, Arabian Sea, Gulf of Oman, Arabian Gulf Fauna of Arabia 19 7-238 Available at -
  • James, PSBR ; Thomas, PA ; Pillai, CSG and Achari Kumaraswamy, GP (1969) ´╗┐Catalogue of types and of sponges, corals, polychaetes, crabs and echinoderms in the reference collections of the Central Marine Fisheries Research Institute Bulletin of Central Marine Research Institute CMFRI, Cochin 7 1-66 Available at -
  • Fauvel, P (1953) The fauna of India including Pakistan, Ceylon, Burma and Malaya: Annelida, Polychaeta The Indian press ltd., Allahabad 507 pp Available at - NIO, Goa

Page last updated on:2011-03-18

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