Thalassema diaphanes   Sluiter,  1888 (Marine Worm)
Organism information awaits expert curation
Class: Echiuroidea

Body cylindrical in shape and constricted in two regions. The animal measures 34 mm in length and 6 mm across the broadest part. Body wall is thin and diaphanous, small glassy papillae are sparsely distributed on the body wall. The proboscis is spoon-shaped, white in color and measures 8 mm in length and 5 mm at the broadest part. The proximal half of the proboscis is wider, margin crenulated and inflected ventrally to join at the ventral margin of the mouth. Two ventral hooks are light brown in color, their tips sharply bent. The posterior end of the trunk is smooth and devoid of papillae. Genital apertures are indistinguishable externally.

Body cavity is filled with mud and mud pellets with no trace of sand or shingle. Gonoducts are two in number, small and oval in shape and located posterior to the ventral hooks. Gonostome is basal, simple annular gonostomal lip is borne on a short stalk. Anal vesicles are short and tubular.

Synonym (s)
Thalassema diaphanes Sluiter, 1889
Thalassema diaphanes Stephen and Edmonds, 1972

Common Name (s)
Economic Importance and Threats



• Gujarat, Gulf of Kachchh (Lat: 22.6) (Long: 69.5) INDIA
• Lakshadweep (Lat: 10.5) (Long: 73) INDIA
• Lakshadweep, Kavaratti INDIA (Record: 9/2/1986)
• Lakshadweep INDIA
• Andaman and Nicobar Islands, Andaman Islands INDIA

Literature Source(s)
  • Subba Rao, NV and Sastry, DRK (2005) Fauna of Marine National Park, Gulf of Kuchchh (Gujarat) ZSI 79 pp Available at - NCL, Pune
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Haldar, BP and Dattagupta, AK (1991) Echiura State fauna series 2: Fauna of Lakshadweep ZSI, Calcutta 185-197 Available at - NIO, Goa

Page last updated on:2010-07-29

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