Hybridolinus

Li, Liang & Zhou, Hong-Zhang, 2010, Taxonomy of the genus Hybridolinus Schillhammer (Coleoptera: Staphylinidae: Philonthina) from China, Zootaxa 2360, pp. 34-46 : 36

Key to species of Hybridolinus

1. Head and pronotum without microsculpture ................................................................................................................ 2

- Head and pronotum with distinct microsculpture......................................................................................................... 4

2. Tergites III–V entirely black, posterior half of tergite VI and entire tergite VII reddish; elytra brick-red, each with only a slight “shadow” postero-laterally; eyes smaller, 1.15 times as long as tempora ..... H. singularis Schillhammer

- Tergites III–VII with posterior margins markedly reddish; elytra brick-red, each with variably large, well delimited black marking laterally; eyes very large, 1.75–2.00 times as long as tempora............................................................. 3

3. Antennae with last three segments creamy white; underside of paramere with 18–19 sensory peg setae on each lobe ( Figs. 6 H, 7B) ..................................................................................................... H. fengyangshanus Li & Zhou sp. n.

- Antennae with last two segments creamy white; underside of paramere with 13–15 sensory peg setae on each lobe .. ........................................................................................................................................ H. hesperoides Schillhammer

4. Body entirely black........................................................................................................... H. diabolicus Schillhammer

- Body not entirely black: elytra, tergites and legs at least partly reddish-testaceous, reddish-yellow or yellowish...... 5

5. Abdominal tergite VIII partly black ............................................................................................................................. 6

- Abdominal tergite VIII entirely reddish ....................................................................................................................... 7

6. Elytra reddish-testaceous, each elytron with large, triangular, postero-lateral pitchy patch .......................................... ............................................................................................................................................. H. smetanai Schillhammer

- Elytra black with shoulders, epipleura and posterior margins markedly pale yellowish ............................................... ........................................................................................................................................ H. flavocinctus Schillhammer

7. Elytra violaceous........................................................................................................................................................... 8

- Elytra reddish.............................................................................................................................................................. 11

8. Abdominal tergite VII entirely reddish ............................................................................... H. daliensis Schillhammer

- Basal third or half of abdominal tergite VII black........................................................................................................ 9

9. Femora and tibiae entirely yellow .................................................................................. H. meilishanus Schillhammer

- Femora and apices of tibiae black............................................................................................................................... 10

10. Pronotum with punctures separated by 1–2 times their diameter; paramere with angular emargination ( Figs. 6 F, 7D) ................................................................................................................................. H. baoxingensis Li & Zhou sp. n.

- Pronotum with punctures separated by 2–5 times their diameter; paramere with rounded emargination (similar to Fig. 7 G) ................................................................................................................................... H. similis Schillhammer

11. Legs entirely yellow.......................................................................................................... H. jizushanus Schillhammer

- Femora and apices of tibiae dark ........................................................................................ H. decipiens Schillhammer 1. Hybridolinus baoxingensis Li & Zhou sp. n. ( Figs. 1–3 , 6 F, 7D–F)

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 3. Hybridolinus baoxingensis Li & Zhou sp. n. A, aedeagus; B, gonocoxites of female genital segment; C, stylus of male tergite IX; D, apical portion of median lobe of aedeagus, lateral view; E, sternite VIII of male; F, sternite IX of male; G, tergite X of male. Scale bars 0.5 mm.

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.

FIGURE 7. Scanning electron micrographs of aedeagus. Hybridolinus fengyangshanus Li & Zhou sp. n.: A, underside of paramere; B, sensory peg setae situated on underside of paramere; C, sensory peg seta; H. baoxingensis Li & Zhou sp. n.: D, paramere, dorsal view; E, sensory peg setae situated on underside of paramere; F, apical portion of median lobe, lateral view; H. decipiens: G, paramere, dorsal view; H, sensory peg setae situated on underside of paramere; I, apical portion of median lobe, apical view; H. smetanai: K, apical portion of median lobe and paramere, ventral view; L, sensory peg setae situated on underside of paramere; H. decipiens: M, excretory pores on surface of median lobe.