Friday, July 10, 2015

[Ichthyology • 2015] Cobitis sakahoko • A New Species of Spined Loach (Cypriniformes: Cobitidae) from southern Kyushu Island, Japan

Cobitis sakahoko Nakajima & Suzawa, 2015
Fig. 6 Photographs of living Cobitis sakahoko sp. nov. (non-type specimen).
a Male, lateral view of head and pectoral fin, b male, dorsal view of head and pectoral fin, c male, 19 April 2014, in the type locality.
All photos by Ryu Uchiyama || DOI: 10.1007/s10228-015-0476-5

We describe a new species of spined loach, Cobitis sakahoko, based on the holotype and nine paratypes collected from the Oyodo River system in the southern region of Kyushu Island, Japan. This species is distinguished from its congeners by the following combination of characteristics: lamina circularis at the base of the pectoral fin in adult males, a rectangular plate with a neck in the mid-lower part; the upper segments of the first branched soft ray of the pectoral fin broad; snout relatively short, length 32.1–38.2% of head length; long maxillary barbel, longer than the eye diameter; prepelvic myotome number 14; and line L5 organised in 8–13 oblong or ovoid blotches.

Keywords: Cobitoidei, Freshwater fish, Cobitis sp. Oyodo form, Oyodo-shima-dojyô

Fig. 4 Male (a, c, e holotype, TKPM-P17335, 67.0 mm SL) and female (b, d, f paratype, KPM-NI31984, 65.1 mm SL) of Cobitis sakahoko sp. nov. a, b Lateral view (after fixing), c, d dorsal view (after fixing), e, f lateral view (in life)

Jun Nakajima and Yuzuru Suzawa. 2015. Cobitis sakahoko, A New Species of Spined Loach (Cypriniformes: Cobitidae) from southern Kyushu Island, Japan.
Ichthyological Research. DOI: 10.1007/s10228-015-0476-5