Craspedomerus Bernhauer, 1911

Li, Liang & Zhou, Hong-Zhang, 2010, Taxonomy of the genus Craspedomerus Bernhauer, 1911 (Coleoptera: Staphylinidae: Philonthina) from China, Zootaxa 2506, pp. 1-25 : 3

Genus Craspedomerus Bernhauer, 1911

Bernhauer, 1911: 88 (genus description); Bernhauer & Schubert, 1914: 400 (world catalog); Winkler, 1925: 387 (catalog for Palaearctic region); Cameron, 1925: 71 (catalog of Indian species); 1932: 248 (key to species of British India); Scheerpeltz, 1933: 1410 (world catalog supplement); Blackwelder, 1952: 110 (type species); Moore, 1960: 100 (key to genera); Scheerpeltz, 1976b: 148 (key to species of Himalayan region); Schillhammer, 1998: 148 (characters); Hayashi, 2000: 23 (notes on empodial setae); Smetana & Davies, 2000: 13 (characters); Herman, 2001: 2582 (world catalog); Smetana, 2004: 632 (catalog for Palaearctic region); Schillhammer, 2005: 184 (characters).

Type species. Philonthus glenoides Schubert, 1908 ; fixed by monotypy.

Diagnosis. The genus Craspedomerus can be easily distinguished from the other genera in the subtribe Philonthina by the combination of the following character states: maxillary palpi long, with 4th segment cylindrical and distinctly longer than penultimate segment ( Fig. 1 E); labial palpi long, with 3th segment slightly longer than 2nd segment ( Fig. 1 F); antennae moderately long, basal three segments polished, bearing only sparse strong setae, 3rd segment much longer than 2nd, the following segments gradually decreasing in length, but all longer than wide; first four segments of front tarsus in both sexes at least slightly dilated, with some modified pale setae ventrally ( Fig. 1 F); pronotum densely and finely punctate, narrowly impunctate along midline; superior line of pronotal hypomeron deflexed under third anterior margin of pronotum and extended (from point where it bends ventrad) into slightly crenulate ridge that forms the additional “fake” lateral line ( Fig. 1 G); abdomen with tergites III–V bearing two basal lines ( Fig. 2 H); basal line of sternite III arcuately extended posteriad in middle ( Fig. 1 J); sternite VIII of male with moderately wide, obtusely triangular medio-apical emargination; sternite IX of male genital segment with basal portion distinctly asymmetrical; aedeagus with median lobe distinctly exceeding paramere, evenly narrowed into subacute apex; paramere bifurcate apically, Y-shaped ( Fig. 2 F), underside of each branch with group of rather small, irregularly arranged sensory peg setae ( Figs. 12 A–I).

Figures

FIGURE 1. Scanning electron micrographs of Craspedomerus giganteus Li & Zhou sp. n. A, underside of head, showing gula (arrows), ventral view; B, left mandible, showing dorsolateral groove and two large teeth (arrows); C, basal three segments of antennae; D, male protarsus, dorsal view; E, maxillary palpus; F, labial palpi; G, pronotal hypomeron, showing “ fake ” lateral line (arrow); H, prosternum, ventral view; I, mesoventrite, without transverse ridge, ventral view; J, sternite III, showing basal line (arrow), ventral view; K, metaventrite, ventral view; L, osmeterium, dorsal view.

FIGURE 2. Scanning electron micrographs of Craspedomerus giganteus Li & Zhou sp. n. A, right mandible, showing one large tooth (arrow); B, mesopretarsus, empodial setae absent, ventral view; C, penultimate segment of labial palpus, showing macrosetae arranged at base; D, labium with round ligula, ventral view; E, mentum, ventral view; F, paramere of aedeagus; G, ctenidium on protibia, consisting of one row of stout setae (arrows); H, tergites III – IV, showing two basal lines (arrows), dorsal view; I, mesoscutellum, showing two transverse carinae (arrows), dorsal view.

FIGURE 12. Scanning electron micrographs of the underside of one of the branches of the paramere of Craspedomerus. A, C. sinetuber (Coiffait); B, C. glenoides (Schubert); C, C. beckeri Bernhauer; D, C. violaceipennis Cameron; E, C. zhangi Li & Zhou sp. n.; F, C. giganteus Li & Zhou sp. n.; G, C. ganeshensis Coiffait; H, C. gongshanus Li & Zhou sp. n.; I, C. cyanipennis Scheerpeltz. Sensory peg setae are indicated with arrows.