Thursday, May 31, 2018

[Ichthyology • 2018] Exostoma ericinum • A New Glyptosternine Catfish (Siluriformes: Sisoridae) from southwestern China


 Exostoma ericinum Ng, 2018
photo: Hang Zhou 


Abstract

A new species of glyptosternine catfish in the genus Exostoma is described in this study. The new species, Exostoma ericinum, is known from the upper Dayingjiang (=Taping River) drainage in southwestern China and is distinguished from congeners in having an unique combination of the following characters: 42–44 vertebrae; parallel striae on anterolateral surfaces of lips and lower surface of maxillary barbel; interorbital distance 26–31% HL; preanal length 67.7–70.5% SL; body depth at anus 10.4–12.0% SL (1.4–1.9 times in caudal peduncle depth); length of adipose-fin base 39.5–43.0% SL; lacking an incision at posterior extremity of adipose-fin base; caudal peduncle length 23.2–26.2% SL; caudal peduncle depth 5.7–7.9% SL; and caudal-fin lobes with slightly concave posterior margin.



FIGURE 2. Exostoma ericinum, paratype, ZRC 56672, 97.0 mm SL. Lateral view showing coloration in life.
Photograph: H. Zhou.


Heok Hee Ng. 2018. Exostoma ericinum, A New Glyptosternine Catfish from southwestern China (Teleostei: Siluriformes: Sisoridae). Zootaxa. 4420(3);  405-414.  DOI: 10.11646/zootaxa.4420.3.6


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