First record of deep-water hatchetfish from Indian waters

Phylum: Arthropoda

Class: Teleostei Müller, 1845

Order: Stomiiformes Rosen, 1973

Family: Sternoptychidae Duméril, 1805

Polyipnus limatulus Harold & Wessel, 1998

Collection: SE Arabian Sea, northwest of Kollam, Kerala, 9.10°N, 75.82°E, 260 m, 08.10.2013 (FORVSS 320, St. 05), 45m Mid Water Trawl; SE Arabian Sea, southwest of Kochi, Kerala, 9.29°N, 75.66°E, 392 m, 02.11.2014 (FORVSS 331, St. 01), HSDT.

Voucher No.: CMLRE IO/SS/FIS/00601, IO/SS/FIS/00602

Description: Lateral pigment bar tapered and long, approaching or reaching lateral midline. 2 posttemporal spines: dorsal spine long, basal spine <0.5 length of dorsal spine. Photophore scale denticles restricted to PV, VAV, and ACC clusters; no denticles on ACB photophore scales. ACB photophores 8–10. ACC photophores closely juxtaposed, with interspaces <0.5 width of each photophore. Longitudinal parietal keel terminating posteriorly with a disjunct portion bearing 2 spines.

Biological association: None.

Remarks: First distributional record from Indian waters.

Distribution: Arabian Sea. Depth range: 0–392 m.

Distribution map:

Identified by: Rajeev R.

Publication: Rajeev R., Rajeeshkumar M.P., Cubelio S.S., Saravanane N. (2023) An updated checklist of Stomiiformes from Indian waters with nine new records. Journal of the Marine Biological Association of the United Kingdom, 102: e95.

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