Parasclerocheilus branchiatus   Fauvel,  1928 (Marine Worm)
Organism information awaits expert curation
Class: Polychaeta

Size: 35 mm. by 3 mm.

Color: Discolored in alcohol, with the exception of the reddish-carmine eye-spots.

Body rather long, nearly uniform in breadth, slowly tapering backwards, rectangular in section, with a more or less marked ventral groove. Prostomium globular, with two diverging, thick, tentacle-like processes. Four red pigmented plates, linear, arched, converging (eye-spots). Two protractile cushion-shaped nuchal organs. Peristomium achaetous. Proboscis huge, campanulate. Segments divided into four rings, nearly smooth on the ventral side, rough and corrugated on the dorsal. In the first four setigerous segments, the dorsal ramus carries, in front of a bundle of long capillary setae, large curved acicular setae with a hook at the tip. Of the other dorsal and ventral setae with a hook at the tip. Of the other dorsal and ventral setae some are capillary and smooth, while the others are shorter and slightly bent. In the succeeding segments, the dorsal and ventral rami are similar, and in the form of thick rounded processes, without cirri, and each bearing a bundle of capillary setae and shorter, forked, setae with limbs unequal and ciliated on the inner edge. From the 29th setigerous segment to the last one a short slender finger-like process is inserted above the ventral ramus. In the last segments this process reaches one-fourth or one-third of the breadth of the body. A lateral organ lies between the two rami. There are six pairs of branchiae from the 2nd to the 7th setigerous segment, arborescent, densely ramified. The first pair, the smallest, has 6-7 filaments, the four last behind the dorsal setae. Pygidium short, with broad terminal vent and 6 anal cirri: 1 dorsal, 1 ventral and 2 on each side.

Synonym (s)
Parasclerocheilus branchiatus Amoureux et al., 1978
Parasclerocheilus branchiatus Ben-Eliahu, 1976
Parasclerocheilus branchiatus Kudenov & Blake, 1978
Parasclerocheilus branchiatus Mohammad, 1980

Common Name (s)
Economic Importance and Threats



• Arabian Gulf
• Red Sea
• Tamil Nadu, Krusadai Island INDIA

Literature Source(s)
  • Hartman, O (1974) Polychaetous annelids of the Indian Ocean including an account of species collected by members of the International Indian Ocean Expeditions, 1963-1964, and a catalogue and bibliography of the species from India. Part II Journal of the Marine Biological Association of India 16(2) 609-644 Available at - NCL, Pune
  • 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 -
  • Mohammad, MBM (1980) Polychaete annelids from Kuwaitian Islands, Arabian Gulf, with descriptions of four new species Zoological Journal of the Linnean Society 69(1) 31-42 Available at - Zoological records
  • Cantone, G (1982) Researches on the coast of Somalia. Polychaetous annelids of Mogadiscio, Gesira, Bender Mtoni and Sar Uanle Monitore Zoologico Italiano Supplemento 16 (4) 121-139 Available at - Zoological Records
  • 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

Page last updated on:2011-03-25

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