Theristus setifer   Gerlach  (Marine Worm)
Organism information awaits expert curation
Class: Adenophorea

Size: Length 0.8 mm. Tail 6.5 anal diameters long.

Cuticle finely striated. Lips prominent. Cephalic setae 1.0 head diameter long. Cervical and somatic setae are 2.5 – 3.0 head diameters long. Amphid distinct, circular, 0.3 head diameter wide and located just behind cervical setae. Spicule in male bent at right angle, with the proximal and distal part slightly expanded and reaches 25 µm or 1.0 anal diameter long. Gubernaculum short and sheath-like. Tail conical-cylindrical, with two long terminal setae.

Synonym (s)
Theristus setifer Gerlach, 1952

Common Name (s)
Economic Importance and Threats

Habitat:  Sandy, Coastal


• Lakshadweep, Agatti INDIA (Record: 8/2/1987)
• Lakshadweep, Agatti INDIA (Record: 9/2/1987)
• Red Sea
• Lakshadweep INDIA

Literature Source(s)
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Rao, GC (1991) Meiofauna State fauna series 2: Fauna of Lakshadweep ZSI, Calcutta 41-135 Available at - NIO, Goa

Page last updated on:2010-10-27

Back to Search