Nereis heteromorpha   (Horst,  1924) (Marine Worm)
Organism information awaits expert curation
Class: Polychaeta

Size: Length 8-10 mm.

Male Heteronereis with body divided into three regions. Anterior atocous part with 14 segments, epitocous part with 32-45 segments; posterior part atocous with reduced lobes having neither lamellae nor swimming bristles. Heads with two pairs of large coalescent eyes, tentacles and palps bent backwards under the head. Tentacular cirri rather short. Dorsal cirri of the anterior seven parapodia swollen below the tip. In the epitocous parapodia the dorsal ligule is conically elongated, whereas the ventral one has a lamella-shaped distal extremity; a rather large fan-shaped lamella is situated at the base of the dorsal cirrus which bears, along its ventral border, 14 papillae. Ventral cirrus provided ventrally with a large lamella and dorsally with an elongated one; the neuropodial lobe bears a large cordiform lamella. In the caudal region, a dorsal, stout, pale aciculums and a ventral blackish one.

Synonym (s)
Nereis (Lycoris) heteromorpha Horst, 1924
(Homotypic synonym)

Common Name (s)
Economic Importance and Threats



• Palk Bay INDIA

Literature Source(s)
  • (2001) Sanctuary Asia natural history species: Species checklist: Reptiles Sanctuary Asia Sanctuary Magazine Available at -
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) 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
  • 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 -

Page last updated on:2011-03-16

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