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Scientific Name: Nais elinguis Müller, 1774
English Name: Aquatic oligochaete worm
Annelid : Nais elinguis

Photo: Wim Langbroek(GBIF)

Classification:
Kingdom: Animalia
Phylum: Annelida
Class: Clitellata
Order: Tubificida
Family: Naididae
Description:
Nais elinguis is relatively small with the anterior part of the body being brownish in color. It has a simple and rounded prostomium. The pharynx occupies segments II and III. The dorsal bundle of setae contains 2-3 needles and 2-3 hairs, with the needles having a curved tip and finely bifid. The hairs are approximately three times the length of the needles. Ventral setae range from 2 to 5 per bundle, with bifid crotchets. Those on segments II to V are hardly longer, straighter, and thinner than the rest, with the nodulus positioned 1/3 to 1/2 from the distal end. The distal tooth is about twice as long as the proximal one. Pineal setae number between 4-5. The dorsal vessel is located mid-dorsally.
Habitat & Distribution in Bangladesh:
Commonly found in the fish pond, rivers, lakes, haors, and other fresh waterbodies of Bangladesh
Environment:
Freshwater
Main References:

Kabir SMH, Ahmed M, Ahmed ATA, Rahman AKA, Ahmed ZU, Begum ZNT, Hassan MA, Khondoker M (EDS.) 2009 Encyclopedia of flora and fauna of Bangladesh, Vol. 16. Annelida Echainodermata Acanthocephala and Minor Phyla.. Asiatic Society of Bangladesh, Dhaka. 232 pp.

Other References:
DNA Barcodes from Bangladesh
GenBank Accession Number:
Other DNA Barcodes & Nucleutide Sequences
Global IUCN conservation status:
Other Information