New Mystus from Borneo
Posted: 19 Jun 2003, 17:40
HH Ng, 2003. <i>Mystus impluviatus</i>: A New Species of Bagrid Catfish (Teleostei: Bagridae) from Eastern Borneo. Copeia 2003 (2): 373-378.
A new species of bagrid catfish in the genus <i>Mystus</i> is described from the Mahakam River drainage in eastern Borneo. <i>Mystus impluviatus</i> closely resembles <i>Mystus nigriceps</i> and <i>Mystus castaneus</i> but differs in having a second posterior fontanel on the supraoccipital. It can be further distinguished from <i>M. nigriceps</i> and <i>M. castaneus</i> by a combination of the following characters: maximum height of adipose fin 4.7-6.0% SL, length of adipose fin base 31.6-36.1% SL, long second and third dorsal fin rays, causing the dorsal fin to appear less rounded, maximum height of pectoral spine serrations 3.6-4.8% of spine length, a deeply forked caudal fin with a slender upper lobe, and a brown body with a distinct dark triangular patch on the base of the caudal peduncle.
A new species of bagrid catfish in the genus <i>Mystus</i> is described from the Mahakam River drainage in eastern Borneo. <i>Mystus impluviatus</i> closely resembles <i>Mystus nigriceps</i> and <i>Mystus castaneus</i> but differs in having a second posterior fontanel on the supraoccipital. It can be further distinguished from <i>M. nigriceps</i> and <i>M. castaneus</i> by a combination of the following characters: maximum height of adipose fin 4.7-6.0% SL, length of adipose fin base 31.6-36.1% SL, long second and third dorsal fin rays, causing the dorsal fin to appear less rounded, maximum height of pectoral spine serrations 3.6-4.8% of spine length, a deeply forked caudal fin with a slender upper lobe, and a brown body with a distinct dark triangular patch on the base of the caudal peduncle.