Anelassorhynchus dendrorhynchus   (Annandale & Kemp,  1915) (Marine Worm)
Organism information awaits expert curation
Class: Echiuroidea

Size: Total length 38-54 mm; proboscis 10-15 mm

Color: The body wall is translucent with pale winous tinge, sometimes appear darker even black due to presence of mud in the alimentary canal. The nerve cord is visible externally as an opaque white line when the body wall remains translucent. The proboscis is cream colored and dendritic outgrowths tinged with brown.

The proboscis is shovel-shaped and its distal end is truncate. The dorsal surface is smooth while the ventral surface is devoid of longitudinal ridge but provided with inconspicuous ciliated groove. The margin of the proboscis is distinctly serrated, the serrations towards the proximal end gradually developed into small dendritic outgrowths which is less than half as long as it is wide. Ventral hooks are bright golden in color and placed close to proboscis base. Papillae covering the body are densely placed near both extremities but the circum-anal region is devoid of papillae.

The animal is very sluggish in habit. When it is left on a bowl containing mud simulating its natural habitat, it shows only a rythmic movement due to contraction and expansion of longitudinal and transverse muscle layers.

Similar species: The species can be readily distinguished from its nearest ally., Anelassorhynchus branchiorhynchus where the proboscis is relatively longer and more slender and the dendritic outgrowths of its margin are much more highly developed, having a gill-like appearance.

Synonym (s)
Thalassema dendrorhynchus Annandale & Kemp 1915
Anelassorhynchus dendrorhynchus Haldar, 1978

Common Name (s)
Economic Importance and Threats

Habitat:  Muddy


• West Bengal, Sundarbans (Lat: 21.5) (Long: 88.17) INDIA
• West Bengal, Sagar Island (Lat: 21.72) (Long: 88.1) INDIA
• West Bengal, Digha Coast (Lat: 21.61) (Long: 87.53) INDIA
• West Bengal, Basanti INDIA (Record: 25/02/1986)
• West Bengal, Sunderban Tiger Reserve Area INDIA (Record: 06/03/1989)
• West Bengal, Prentice Island INDIA (Record: 08/03/1989)
• Orissa, Chilika Lake INDIA (Record: 1915, 13/06/1986, 14/06/1986, 16/06/1986)
• Tamil Nadu, Pamban INDIA
• West Bengal, Sagar Island INDIA
• East Coast INDIA

Literature Source(s)
  • Haldar, BP (1995) Sipuncula and Echiura Wetland ecosystem series 1: Fauna of Chilika lake ZSI, Calcutta 469-476 Available at - NIO, Goa
  • Ramakrishna; Sarkar, J and Talukdar, S (2003) Marine invertebrates of Digha coast and some recomendations on their conservation Records of the Zoological Survey of India ZSI, Kolkata 101(3-4) 1 Available at - NCL, Pune
  • Mandal, AK and Nandi, NC (1989) Fauna of Sundarban mangrove ecosystem, West Bengal, India Fauna of Conservations 3 35431 Available at - NIO, Goa
  • Goswami, BCB (1992) Marine fauna of Digha coast of West Bengal, India Journal of Marine Biological Association of India The Marine Biological Association of India, Cochin 34 115-137 Available at - NIO, RC Kochi
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Haldar, BP (1995) Echiura and Sipuncula Estuarine ecosystem series, Part 2: Hugli Matla Estuary ZSI, Calcutta 31-39 Available at - NIO, Goa

Page last updated on:2010-07-29

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