Nicolea gracilibranchis   (Grube,  1878) (Marine Worm)
Organism information awaits expert curation
Class: Polychaeta

Size: Length 65-75 mm.

Body with 17 thoracic setigers. Lateral lobes absent, eye-spots hidden under cephalic folds. Gills 2 pairs on segments 2 and 3. Uncini avicular, with two teeth above the main fang, on projecting abdominal pinnules. Two pairs of gills. 17 thoracic setigerous segments with smooth capillary setae and very projecting abdominal pinnules whose uncini are bidentate above the main fang. The eyes are hidden under the cephalic folds. The posterior lip is bilobed. The anterior segments have not lateral lobes. There are 14- 15 ventralscutes. On the segment before the first setigerous lies a small papilla behind the second gill. Nephridal papillae are conspicuous on the 3rd and 4th setigerous segments.

Synonym (s)
Terebella gracilibranchis Grube, 1878
(Objective synonym)

Common Name (s)
Economic Importance and Threats



• Lakshadweep, Agatti INDIA (Record: 29/12/1979)
• Lakshadweep, Minicoy INDIA (Record: 12/03/1983)
• Lakshadweep INDIA
• Gujarat INDIA
• Tamil Nadu, Tuticorin INDIA
• Tamil Nadu, Pamban INDIA
• Tamil Nadu, Gulf of Mannar INDIA
• Tamil Nadu, Chennai Coast INDIA
• Andaman and Nicobar Islands, Andamans INDIA
• Tamil Nadu, Vedalai INDIA

Literature Source(s)
  • A guide to Singapore Polychaetes Available at -
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Misra, A and Chakraborty, RK (1991) Annelida: Polychaeta State fauna series 2: Fauna of Lakshadweep ZSI, Calcutta 137-165 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 -
  • 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
  • Ghosh, A (1963) On a collection of polychaeta from the south-east coast of India with a new eunicid record Journal of the marine biological associaiton of India The marine biological association of India 5(2) 239-245 Available at - NIO, Goa

Page last updated on:2011-06-03

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