Phascolosoma pacificum   Keferstein  (Marine Worm)
Organism information awaits expert curation
Class: Phascolosomatidea

Trunk 38-50 mm long. Introvert 1.2 to 1.7 times as long as the trunk, with 27-30 tentacles and hooks in 75-100 complete rows followed by some incomplete rows or scattered hooks. Each hook with strongly curved apical tooth and blunt accessory tooth together with triangular area besides the central streak. Longitudinal muscles in 23-35 bands often anastomosed. Retractor muscles two pairs. Rectum short and without caecum. Spindle muscle attached posteriorly. Fixing muscle single. Nephridia almost fully attached and usually brown, reaching nearly the posterior end of trunk.

Synonym (s)
Phascolosoma pacificum Keferstein 1866
Physcosoma pacificum Shipley 1903
Phascolosoma pacificum Cutler, Cutler and Nishikawa 1984

Common Name (s)
Economic Importance and Threats

Habitat:  Coastal


• Lakshadweep, Minicoy INDIA (Record: 12/12/1979)
• Lakshadweep, Agatti INDIA (Record: 4/4/1984)
• Lakshadweep, Kavaratti INDIA (Record: 12/2/1986)
• Lakshadweep, Minicoy INDIA (Record: 18/02/1986)

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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