Saturday, January 6, 2018

[Ichthyology • 2017] Parapsilorhynchus swaini • A New Species of Parapsilorhynchus Hora, 1921 (Teleostei, Cyprinidae) from Mahanadi River Basin of Odisha, India


Parapsilorhynchus swaini
 Baliarsingh & Kosygin, 2017
  

ABSTRACT

A new cyprinid fishParapsilorhynchus swaini sp. nov., is described based on specimens collected from a stream near Harisankar, Mahanadi River basin of Odisha, India. It differs from other species of the genus in having following combination of characters: elongated and slender body (depth at dorsal fin origin 16.9-18.7% SL); narrow and slender head (width 60.0-68.7% HL, height at occiput 40.0-50.0% HL); narrow inter orbital space (46.6-50.0% HL); 33-34 lateral line scales; 3 simple pectoral fin rays, poorly developed callous pad behind lower lip which is not delimited posteriorly, pectoral fin longer than head length, presence of tubercles on snout and a black bar on the anal fin. With the description of this new species, distributional range of the genus Parapsilorhynchus is extended further north in the Eastern Ghats to the Mahanadi River drainage of Odisha.

Keywords: Cyprinidae, Mahanadi River basin, New species, Odisha, Parapsilorhynchus swaini



Fig. 1. Parapsilorhynchus swaini sp. nov., ZSI FF5057, holotype, 42.0 mm SL; (a) Dorsal, (b) lateral and (c) ventral views 

Taxonomy 
Parapsilorhynchus swaini Baliarsingh & Kosygin  sp. nov.
Common name: Mahanadhi minnow

Diagnosis: Parapsilorhynchus swaini sp. nov. can be distinguished from other species of the genus by the following combination of characters: elongated and slender body (depth at dorsal fin origin 16.9-18.7% SL); narrow and slender head (width 60.0-68.7% HL, height at occiput 40.0-50.0% HL); narrow inter orbital space (46.6-50.0% HL); 33-34 lateral line scales; 3 simple pectoral fin rays, poorly developed callous pad behind lower lip which is not delimited posteriorly, pectoral fin longer than head length, presence of tubercles on snout and a black bar on the anal fin. 

Distribution: Presently known from a stream near Harisankar, Mahanadi River basin in Odisha, India (Fig. 4). 

Etymology: Named after Dr. S. K. Swain of ICAR-Central Institute of Freshwater Aquaculture (ICAR-CIFA), Bhubaneshwar for his encouragement and support in the present study.


B. K. Baliarsingh and Laishram Kosygin. 2017. A New Species of Parapsilorhynchus Hora, 1921 (Teleostei, Cyprinidae) from Mahanadi River Basin of Odisha, India. Indian J. Fish. 64(4); 44-49.  DOI:   10.21077/ijf.2017.64.4.35503-06

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