Phascolosoma stephensoni   (Stephen)  1942 (Marine Worm)
Organism information awaits expert curation
Class: Phascolosomatidea

Trunk 28 mm long. Introvert nearly as long as trunk with dorsal irregular brown bands and 20 apical finger-shaped tentacles followed by about 40 complete and incomplete rows of hooks. Each hook strongly curved, pointed at apex, with a small accessory tooth and clear narrow streak having triangular area on its convex side and crescentic area on its concave side. Papillae conical, being densely packed at introvert base and scattered at posterior end. Longitudinal muscle bands 18-28. Retractor muscles two pairs. Rectum short and with caecum. Spindle muscle attached posteriorly. Fixing muscle single. Nephridia three-fourths the trunk length and attached about two-thirds of their length.

Synonym (s)
Physcosoma stephensoni Stephen 1942
Phascolosoma (Phascolosoma) stephensoni Edmonds 1980

Common Name (s)
Economic Importance and Threats

Habitat:  Coastal


• Lakshadweep, Kadamatt INDIA (Record: 11/4/1984)

Literature Source(s)
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Haldar, BP (1991) Sipuncula State fauna series 2: Fauna of Lakshadweep ZSI, Calcutta 167-183 Available at - NIO, Goa
  • (2008) Tree of Life Tree of Life Web Project Available at -

Page last updated on:08-04-09

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