Phascolosoma japonicum   Grube  (Marine Worm)
Organism information awaits expert curation
Class: Phascolosomatidea

Trunk 25 and 32 mm long, opaque-skinned and light brown in color. Introvert about three-fourths as long as trunk and without any dark patch on its dorsal surface. Tentacles about 18 in number, arranged in a semi-circle. Hooks arranged in 30 rings distally and scattered proximally, each with a small accessory tooth, apex obtuse and broader than high. Large cone shaped papillae at the base of introvert and posterior end of trunk, of which only the latter posteriorly directed. Longitudinal muscle layer with 24-30 anastomosing bands. Retractor muscles two pairs. Spindle muscle attached posteriorly. Fixing muscle single. Nephridia nearly half as long as trunk and partly attached.

Synonym (s)
Phascolosoma japonicum Grube 1877
Phascolosoma japonicum Cutler, Cutler and Nishikawa 1984

Common Name (s)
Economic Importance and Threats

Habitat:  Coastal


• Lakshadweep, Minicoy INDIA (Record: 14/12/1979)

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

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