Chimaera supapae (Holocephali: Chimaeriformes: Chimaeridae), a new species of chimaera from the Andaman Sea of Thailand

Publication Date

1-1-2024

Document Type

Article

Publication Title

Raffles Bulletin of Zoology

Volume

72

DOI

10.26107/RBZ-2024-0006

First Page

84

Last Page

90

Abstract

A new species of shortnose chimaera is described from a single specimen collected at 772–775 m depth in the Andaman Sea (07.54° N; 96.99° E) off Thailand. The species is distinguished from its congeners by the combination of the following characteristics: massive head with short snout; eyes relatively large, horizontally oval, eye length 32.2% head length; thin body with a relatively long trunk 40% body length (BDL), deciduous skin; uniformly dark brown; preopercular and oral lateral line canals sharing a common branch; posterior margin of pectoral fins slightly convex; long dorsal spine 27% BDL, longer than the first dorsal fin. The new species is morphologically close to Chimaera macrospina from Australia but differs in the length of the ventral caudal lobe, snout-vent length, and pectoral fin anterior margin length. It can be distinguished from C. macrospina and other Chimaera species based on the DNA sequence divergence of the mitochondrial ND2 gene.

Funding Number

N25A650485

Funding Sponsor

Mahidol University

Keywords

Chondrichthyes, eastern Indian Ocean, genetics, morphology, SE Asia, taxonomy

Department

Moss Landing Marine Laboratories

Link to Full Text

Share

COinS