Trisinus Raffray, 1894

Yin, Zi-Wei, Nomura, Shûhei & Zhao, Mei-Jun, 2012, Batrisoplisus Raffray, 1908, a new synonymy of Trisinus Raffray, 1894 (Coleoptera, Staphylinidae, Pselaphinae), with description of three new Chinese species, Zootaxa 3222, pp. 61-68 : 62

Trisinus Raffray, 1894

Trisinus Raffray, 1894: 265 . Type species: Trisinus cratocerus Raffray, 1894 (designated by Lucas 1920: 657).

Batrisoplisus Raffray, 1908: 180 . Type species: Batrisus antennatus Weise, 1877 (by monotypy). New synonymy.

Diagnosis. Body small (less than 2 mm). Head nearly rectangular; frontal rostrum indistinct; antennal tubercles prominent; with distinct vertexal foveae connected by a U-shaped sulcus. Pronotum lacking spines; median and lateral longitudinal sulci present. Elytra each with two basal foveae, discal striae extending past elytral midpoint; subhumeral fovea and marginal stria present. Abdomen with tergite IV (visible tergite I) largest, with thick triangular ridge formed by inner and outer marginal carinae.

Remarks. The type species of the two genera do not differ in the characters listed above in the diagnosis of Trisinu. For this reason Batrisoplisus Raffray, 1908 is placed in synonymy with Trisinus Raffray, 1894 .

Batrisoplisus was originally established for a single species, Batrisus antennatus Weise, 1877 . However, the name Batrisus antennatus Weise, 1877 is a primary junior homonym of Batrisus antennatus Motschulsky, 1851 . Löbl (1998) proposed a replacement name, Batrisoplisus nomurai Löbl, 1998 , for Batrisus antennatus Weise, 1877 (non Motschulsky, 1851). Recently, Batrisoplisus nomurai was synonymised with Batrisoplisus tosanus Nomura, 1991 ( Nomura 2006) .