Amphisternus, : TOMASZEWSKA, 2005

Tomaszewska, Wioletta, 2014, New species of the Amphisternus-group of Lycoperdininae from Philippines (Coleoptera: Endomychidae), Acta Entomologica Musei Nationalis Pragae 54 (2), pp. 635-644 : 637-638

Key to the species of Amphisternus

(based on STROHECKER (1964) and WANG & REN (2007))

1 Dorsum covered with short, dense pubescence; body length 8.7 mm; China, Yunnan. .... .................................................................................... A. pubescens Chang & Ren, 2013

– Dorsum without pubescence. ......................................................................................... 2

2 Elytral umbo without spine. ........................................................................................... 3

– Elytral umbo with cylindrical or conical spine. ........................................................... 12

3 Wingless, elytral humeri strongly oblique. .................................................................... 4

– Winged, humeri subrectangular. ..................................................................................... 7

4 Elytra wholly black, very coarsely punctured; body length 7.5 mm; Vietnam, Laos. ...... ................................................................................................... A. sordidus Arrow, 1928

– Elytra with red or yellow areas. ..................................................................................... 5

5 Elytra with 2 preapical spots. ......................................................................................... 6

– Elytra with single pre-apical spot; body length 6.5–7.0 mm; Java. .................................. ............................................................................................ A. verrucosus Gorham, 1897

6 Elytral humeri dark; discal prominence smaller, rounded; preapical spots transversely- -oval, sometimes connected in form of transverse band; body length 6.3 mm; Indonesia (Sumatra). .............................................................................. A. nanus Strohecker, 1964

– Elytral humeri with red-orange spot; discal prominence large, rectangular; preapical spots elongate-oval; body length 6.8–7.8 mm; Philippines (Mindanao). ......................... .............................................................................................................. A. alberti sp. nov.

7 Umbonal carina without tubercle. .................................................................................. 8

– Umbonal carina with tubercle. ..................................................................................... 10

8 Elytra slightly longer than their combined width. .......................................................... 9

– Elytra 1.5 times as long as wide; body length 9.5–10.0 mm; Malaysia. ........................... .............................................................................................. A. opacus Strohecker, 1957

9 Elytra abruptly rounded to apex; body length 8.0– 9.3 mm; Java. .................................... .......................................................................................... A. tuberculatus Germar, 1843

– Elytra distinctly tapering behind middle; body length 7.0 mm; Indonesia, Malaysia. ..... .................................................................................................. A. eruptus Gorham, 1901

10. Elytra with a discal subcarinate tubercle. .................................................................... 11

– Elytra with a high discal prominence; body length 7.5 mm; Indonesia, Malaysia ( Malacca). ...................................................................................... A. vomeratus Gorham, 1901

11 Scape of antenna and the outer half of each femur blood-red; body length 9.0 mm; Burma. .................................................................................. A. corallifer Gerstaecker, 1857

– Scape of antennae and femora black; body length 10.7–11.3 mm; China. ....................... .................................................................................... A. rufituberus Wang & Ren, 2007

12 Elytra much prolonged at apex; body length 7.4 mm; Malaysia. ..................................... ........................................................................................... A. caudatus Strohecker, 1964

– Elytra rather abruptly rounded to apex. ........................................................................ 13

13 Discal prominence of elytron truncate; body length 7.0 mm; Malaysia. .......................... .................................................................................................... A. grandjeani Pic, 1930

– Discal prominence of elytron rounded at apex. ............................................................ 14

14 Elytron with broad post-median pale bar; body length 8.0 mm; Malaysia ( Malacca). ..... ................................................................................................. A. malaccanus Pic, 1930

– Elytron with 2 small spots behind middle; body length 7.5 mm. ................................. 15

15 At least hind elytral pustules red; discal elytral prominence at least as high as long; ...... Malaysia ( Sarawak). .................................................. A. mucronatus Gerstaecker, 1857

– Elytral pustules dark; discal elytral prominence lower than long, Malaysia (Sabah). ...... ............................................................................................ A. lugubris Strohecker, 1968