First record of brittle star from the Indian waters

Amphiura (Amphiura) uncinata

Phylum: Echinodermata

Class: Ophiuroidea Gray, 1840

Order: Amphilepidida O’Hara, Hugall, Thuy, Stöhr & Martynov, 2017

Family: Amphiuridae Matsumoto, 1915

Amphiura (Amphiura) uncinata Koehler, 1904

Collection: Andaman & Nicobar Islands — Off Port Blair, 11° 34.72’ N, 92° 54.09’ E, 485 m (FORVSS367I, St.21), 18.11.2017, dredge; 11° 34.20’ N, 92° 54.60’ E, 469 m (FORVSS388, St.01), 09.08.2019, dredge.

Voucher No.: CMLRE IO/SS/ECD/00304, 00314.

Description: Disc with scalloped margins; disc scales fine, imbricating; radial shields twice as long as wide, length about one third of disc diameter, separated by a row of scales, distally in contact. Oral shields longer than wide, with an acute proximal angle, rounded lateral angles and a broad distal lobe. Infradental papillae thick, with broadly squared-off distal margins, one distal oral papilla, broad at the base with a semi-circular or triangular outer margin. Arm spines numbering three in proximal segments, increasing to six; middle spines longest. In the first 5–7 arm segments, the middle arm spines conspicuously modified as recurved, hook-like structures ending in sharp, glassy points; all other spines bluntly conical.

Biological association: None.

Remarks: None.

Distribution: South Africa, Mozambique, Madagascar, Oman, India: Andaman & Nicobar Islands, Indonesia, Philippines, Taiwan; 100–1415 m.

Distribution map:


Identified by: Usha V. Parameswaran

Publication: Parameswaran U. V., Gopal A., Abdul Jaleel K. U., Saravanane N. 2021. Nine new records of brittle stars (Echinodermata: Ophiuroidea) from Indian waters. Marine Biology Research, 17(5-6): 434-453. DOI: 10.1080/17451000.2021.1967995.

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