Disoma orissae   Fauvel  1932 (Marine Worm)
Organism information awaits expert curation
Class: Polychaeta

Size: 20-25 mm long

Prostomium elongated and slightly notched in front, bulging in the middle and ending behind in a crest reaching to the 2nd setigerous segment. On the raised part 4 small eyes are present. On the first setigerous segment a large lanceolate subulate, dorsal cirrus and a ventral one directed forwards, a small bundle of capillary setae in front of the dorsal cirrus and a fan-shaped ventral bundle of setae extending beyond the peristomium. On the 2nd setigerous segment dorsal and ventral cirri, triangular, smaller than the first ones, and a ventral setae of two types: (1) an anterior row of very fine capillary setae and (2) a posterior row of stouter shorter bristles with blunt curved tips. On the third segment a large lanceolate chopper-like, dorsal cirrus, a triangular ventral cirrus, smaller than the dorsal one. The dorsal setae disappear about 11th foot. From the 9th segment backwards the dorsal cirri become filiform and the ventral ones are modified about 11-12th feet. Beyond the 11th foot long filiform ventral papillae make their appearance, a single one at first under each foot. From 9th foot backwards, the ventral setae are of (1) stout straight, bodkin-shaped and (2) very slender capillaries.

Synonym (s)
Disoma orissae Fauvel 1932
Disoma orissae Fauvel 1953

Common Name (s)
Economic Importance and Threats

Habitat:  Benthic, Estuarine


• Kerala, Kochi Backwaters (Lat: 9.97) (Long: 76.22) INDIA
• Tamil Nadu, Parangipettai Coast (Lat: 11.48) (Long: 79.76) INDIA (Record: 1998)
• Bay of Bengal (Record: 1998)
• Kerala, Kochi Estuary INDIA (Record: 03/1974-03/1976)
• Orissa, Off Puri INDIA (Record: 2001)
• Southwest Coast INDIA (Record: 2001)
• Tamil Nadu, Porto Novo INDIA

Literature Source(s)
  • Sheeba, P Distribution of benthic infauna in the Cochin backwaters in relation to environmental parameters (Ph. D thesis-Cochin University of Science and Technology, Kochi, India) 241 pp Available at - Cochin University of Science and Technology, Kochi, India
  • Srikrishnadhas, B; Murugesan, P and Khan, SA (1998) Polychaetes of Parangipettai coast Annamalai University, Parangipettai 110 pp Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Pillai, NGK (2001) On some benthic polychaetes from Cochin Estuary Journal of the Marine Biological Association of India The Marine Biological Association of India, Cochin 43(1&2) 120-135 Available at - NIO, Goa
  • Srikrishnadhas, B; Ramamoorthi, K and Balasubrahmanyan, K (1987) Polychaetes of Porto Novo waters Journal of the Marine Biological Association of India The marine biological association of India 29(1&2) 134-139 Available at - NIO, Goa

Page last updated on:2011-04-13

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