Обзор китайских представителей рода Mastacembelus с описанием 2 новых видов

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Обзор китайских представителей рода Mastacembelus с описанием 2 новых видов

Сообщение Yan » Сб май 07, 2011 9:50 am

Mastacembelus strigiventus
Mastacembelus triolobus

Zhou & Yang, 2011
Abstract

This paper deals with the taxonomy of the genus Mastacembelus in China. Two new species, Mastacembelus strigiventus Zhou et Yang, sp. nov. and Mastacembelus triolobus Zhou et Yang, sp. nov., and a new record species for China, Mastacembelus oatesii (Boulenger) were described. Types were deposited in the Kunming Institute of Zoology (KIZ), Chinese Academy of Sciences and the Southwest Forestry University (SWFC). The diagnostic characteristics of Mastacembelus strigiventus sp. nov. are: dorsal, anal, and caudal fins almost entirely joined, but with distinct notches among dosal-fin, anal-fin and caudal-fin outline; body sides and back with 4-5 zig-zag longitudinal lines and forming a network from front of anal origin to caudal base; a longitudinal brown line from the isthmus to anus on the abdomen or sometimes the line becoming a network. Mastacembelus triolobus sp. nov. can be distinguished from all congeners of the genus in China by the combination of the following characteristics: fewer dorsal, anal and caudal fin rays, dorsal and anal fìns joined to caudal fìn only near its base, caudal-fìn outline entirely separate from that of dorsal and anal fìns; sides of body lacking marbling, network, or irregular dark brown blotches, except with 14-15 dark blotches on its back, abdomen grey without stripe; HL less than 3.5 times of HW, and 2.8 times of snout length. M. oatesii differs from all congeners in the genus in China in having more caudal fin rays, fewer dorsal and anal fin rays; dorsal and anal fins joined to caudal fin only near its base, caudal-fìn outline entirely separate from that of dorsal and anal fins; body with marbling or irregular dark brown blotches, abdomen light grey without lines or mesh patches; HL more than 4.0 times of HW, 3.0 times of snout length.
A review of the genus Mastacembelus (Perciformes, Mastacembeloidae) in China with description of two new species and one new record.
Yang Li-Ping & Zhou Wei
Acta Zootaxonomica Sinica, 36 (2): 325-331, 2011.
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