Hybridolinus Schillhammer, 1998

Li, Liang & Zhou, Hong-Zhang, 2010, Taxonomy of the genus Hybridolinus Schillhammer (Coleoptera: Staphylinidae: Philonthina) from China, Zootaxa 2360, pp. 34-46 : 35

Genus Hybridolinus Schillhammer, 1998

Hybridolinus Schillhammer, 1998: 146 ; Schillhammer, 2000: 144 (key to species); Hayashi, 2000: 23 (notes on empodial setae); Herman, 2001: 2694 (world catalog); Smetana, 2004: 638 (catalog for Palaearctic region); Schillhammer, 2008: 242 (revised key to species).

Type species: Hybridolinus daliensis Schillhammer, 1998 , fixed by original designation.

Diagnosis. The genus Hybridolinus can be easily distinguished from other genera in the subtribe Philonthina by the combination of the following character states: maxillary palpi long, with last segment rodlike and slightly longer than penultimate segment ( Fig. 2 A); labial palpi with 2nd segment very long, bearing four setae at base ( Fig. 2 B); pronotum densely punctate, narrowly impunctate along midline; superior line of pronotal hypomeron extended (from point where it bends ventrad) into slightly crenulate ridge that forms the additional “fake” lateral line ( Fig. 1 G); first four protarsal segments in both sexes distinctly dilated, with some modified pale setae ventrally; protibia apically with ctenidium consisting of one row of stout setae ( Fig. 2 C); abdomen with all tergites bearing only one basal line ( Fig. 1 H); basal line of sternite III extended apicad into acute process ( Fig. 1 I); paramere of aedeagus bilobed apically, underside of each lobe with a group of small and irregularly arranged sensory peg setae ( Figs. 6 F–I, 7B, E, H, L).

Figures

FIGURE 1. Scanning electron micrographs of Hybridolinus baoxingensis Li & Zhou sp. n. A, head, showing dorsal ridge of neck (arrow), dorsal view; B, tempora, lateral view; C, underside of head, showing gula (arrows); D, prosternum; E, mesoventrite; F, metaventrite; G, pronotal hypomeron, showing “ fake ” lateral line (arrow), lateral view; H, abdominal tergites III – IV; I, abdominal sternite III, showing basal line (arrow).

FIGURE 2. Scanning electron micrographs of Hybridolinus baoxingensis Li & Zhou sp. n. A, maxillary palpus and labial palpus, ventral view; B, second segment of labial palpus, lateral view; C, ctenidium on protibia, consisting of one row of stout setae (arrows), lateral view; D, labium with round ligula, ventral view; E, mentum with two long setae; F, apical portion of last segment of mesotarsus, empodial setae absent, ventral view; G, right elytron, showing sub-basal ridge (arrow), dorsal view; H, last segment of labial palpus; I, hind leg.

FIGURE 6. Details of Hybridolinus. Hybridolinus smetanai: A, aedeagus; B, apical portion of median lobe of aedeagus, lateral view; C, sternite IX of male; D, sternite VIII of male; E, tergite X of male. Apical portion of underside of paramere: F, H. baoxingensis Li & Zhou sp. n.; G, H. decipiens; H, H. fengyangshanus Li & Zhou sp. n.; I, H. smetanai. Scale bars 0.5 mm.