Ochetostoma australiense   Edmonds,  1960 (Marine Worm)
Organism information awaits expert curation
Class: Echiuroidea

Size: 70 mm in length with the proboscis 26 mm

The specimen is of medium size. The proboscis is almost flat, smooth with slightly wavy margin. The skin in preserved state is dirty gray, somewhat translucent as compared to thicker and opaque extremities of the body. The surface of the body is covered with minute and irregularly distributed papillae. Two ventral setae, provided with interbasal muscles, are situated a little behind the proboscis base.

Internally, the longitudinal muscle layer of the body wall is separated into 14 bands. Small bundles of inner oblique musculature between longitudinal muscle bands are prominent. The coils of intestine are held in position by what appear to be innumerable strands from the body wall. Rectal caecum is present. Nephridia are three pairs, the first pair being presetal and the other two pairs postsetal in position; nephrostomal lips are spirally coiled. The anal vesicles are long, tubular and provided with numerous short funnels. The vascular system consists of one each ventral, ring sinus, heart and dorsal, and also two neurointestinalis.

Similar species: This species is closely related to Ochetostoma erythrogrammon from Andamans, but differs by number of neurointestinalis (2 vs. 1) and number of longitudinal muscle band (12-13 or 11-14 vs. 14-18).

Synonym (s)
Ochetostoma australiense Edmonds, 1960
Ochetostoma australiense Dattagupta, 1971

Common Name (s)
Economic Importance and Threats



• Andaman and Nicobar Islands, Andaman Islands (Lat: 10) (Long: 93) INDIA
• Orissa, Barkuda Island INDIA (Record: 07/10/1972)
• Andaman and Nicobar Islands, Andaman Islands INDIA
• Orissa, Chilika Lake INDIA

Literature Source(s)
  • Saxena, R (1983) Significance of the gonoduct in the classification of echiurans (phylum Echiura) Journal of Zoology 199(2) 149-156
  • Haldar, BP (1995) Sipuncula and Echiura Wetland ecosystem series 1: Fauna of Chilika lake ZSI, Calcutta 469-476 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

Page last updated on:2010-07-29

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