Rangarajan, K.; Mahadevan, S. (1961). On a new species of Nothria Malmgren (Polychaeta, Annelida) from the Gulf of Mannar. Journal of Marine Biological Association of India. 3(1): 179-185.

51502

Rangarajan, K.; Mahadevan, S.

1961

3(1): 179-185

Publication

http://mbai.org.in/php/journal.php?bookid=25&type=0

World Polychaeta Database (WPolyDb)

Available for editors   [request]

1. A small polychaetous annelid inhabiting a peculiar, flattened tube made of lamellibranch shell fragments dredged from the Gulf of Mannar opposite Pudumadam has been referred to the family Onuphidae, genus Nothria and described as a new species, N. mannarensis. 2. A round head bearing five occipital tentacles, posterior lateral being long, a pair of club-shaped frontal tentacle and a pair of thick palpi on the ventral side, two pairs of eyes, a pair of tentacular cirri on an achaetous segment, an achaetous anal segment with a pair of anal cirri, origin of gill as a short filament on the 8th setiger, first two setigers larger and pointing forwards, ventral cirrus becoming a pad-like structure on the 4th setiger, disappearance of the cirriform process of the posterior lip of parapodia on the 15th setiger, gill and dorsal cirrus of same length in 10th setiger, presence of compound, bidentate, hooded setae and simple, bidentate, hooded setae in first two setigers, bilimbate, capillary setae from the 5th setiger, two bidentate hooded subacicular hooks in the posterior segments and the presence of compound, bidentate, hooded setae in the last four setigers are the distinguishing features of this species. 3. The specific characters of the present form are compared with those of the hitherto known species under the genus.

Indian Ocean

Systematics, Taxonomy

Annelida
Polychaeta

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