Stenus bigemmatus, Puthz, 2011

Puthz, V, 2011, On the Stenus LATREILLE 1797 from Taiwan with spotted elytra including remarks on the S. gestroi-group (Coleoptera, Staphylinidae) (316 Contribution to the Knowledge of Steninae), Linzer biologische Beiträge 43 (1), pp. 565-596 : 588-589

Stenus bigemmatus nov.sp. ( Figs 39 , 65 , 79 , 91, 96 )

T y p e m a t e r i a l: Holotype: TAIWAN: Chiai Hsien : Yushan National Park, Mun-Li Cliff, 2700 m, 27.IV.1990, leg. A SMETANA (T 28): in coll. SMETANA (Ottawa).

D e s c r i p t i o n: Macropterous, black with a faint lustre, each elytron with a long, oval, slightly elevated orange spot in posterolateral quarter (fig. 39); punctuation coarse to very coarse, coalescent on pronotum and elytra; pubescence short, recumbent. Anten-

nae brownish, club infuscate. Maxillary palpi reddish brown. Paraglossae coniform. Legs reddish brown, apical portion of femora shortly infuscate.

Length: 6.8 mm (forebody: 3.4 mm).

PM of the HT: HW: 55.5; DE: 28; PW: 44; PL: 52.5; EW: 54; EL: 60; SL: 47; SpL: 23.

M a l e: Femora swollen, metatrochanter toothlike prominent (fig. 96), meso- and metatibiae each with a small preapical spine, metatibiae curved inwards. Metatsternum broadly and very deeply concave, punctuation slightly less coarse, distinctly more sparse than in S. bilunatus . Sternites 3-7 with very shallow median impressions, which are much denser punctate and pubescent than the sternites laterally, sternite 7 very shallowly emarginated apically. Sternite 8 apically with a moderately broad notch about one tenth as long as the sternite. Sternite 9 with a shap tooth apicolaterally. Tergite 10 broadly rounded. Aedeagus about as in S. bilunatus (fig. 65), the apicomedian excision of the expulsion clasp narrower and deeper (fig. 79, 91).

Female: Unknown.

C o m p a r a t i v e n o t e s: In most respects very similar to S. bilunatus , but the head comparatively broader, the elytral spot distinctly elevated, relatively long, the sculpture of the forebody slightly more coalescent and the male sexual characters different.- For identification amongst the Taiwanese species see key.

E t y m o l o g y:" bigemmatus " (Lat.) = with two gems.

Figures

Figs 26-45: Elytra (26, 28, 30, 31, 33-43), dorsal and lateral aspect of abdominal segments (27, 29, 32, 44) and ventral aspect of abdominal segments 6 and 7 (45) of Stenus mithracifer nov.sp. (26, HT; 27, PT), S. electrigemmeus nov.sp. (28, HT; 29, PT), S. electrigemmatus nov.sp. (30, HT), S. electristigma nov.sp. (31, HT; 32, PT), S. shibatai nov.sp. (33, HT), S. shibataiellus nov.sp. (34, HT), S. shibataianus nov.sp. (35, HT), S. stigmifer nov.sp. (36, HT; 37, PT, T 24), S. bilunatus PUTHZ (38, T 86), S. bigemmatus nov.sp. (39, HT), S. bigemmosus nov.sp. (40, HT), S. bilunatior nov.sp. (41, PT, T 127), S. bilunatoides nov.sp. (42, PT, T 155), S. bistigmosus nov.sp. (43, HT), S. miwai BERNHAUER (44, Henglou), S. bicolon SHARP (45, Tengchih).

Figs 46-69: Ventral aspect of the anterior portion of median lobe of Stenus gestroi FAUVEL (46, lectotype; 47, Carin Cheba; 48, Cameron Hills; 49, Arni Gad; 50, Doi Pui; 51, Shishitou 1; 52, Shishitou 2; 53, Luyeh; 54, Tokara Is.; 56, Wuyi Mts.), S. cephalo PUTHZ (55, Sumatra), S. lacertosus L. BENICK (57, Java), S. bilunatus PUTHZ (58, HT; 59, Piluchi; 60, Arisan; 61, T 28; 62, T 48; 63, T 149), S. bigemmosus nov.sp. (64, HT), S. bigemmatus nov.sp. (65, HT), S. bilunatior nov.sp. (PTT, 66, T 43 a; 67, T 43 b), S. biluminatus nov.sp. (68, HT), S. bistigmosus nov.sp. (69, HT). Scale bar = 0.1 mm.

Figs 70-88: Anterior portion of the expulsion clasp of the aedeagus (70-84), posterior portion of sternite 9 (85-88) of Stenus coronatus L. BENICK (70, Yun Shan; 71, 35 km N. Lijiang; 72, Zhongdian Co.), S. coronatus zipanguensis PUTHZ (73, Mt. Kurofu; 74, Shirane), S. bilunatus PUTHZ (75, T 48a; 76, T 48b; 77, Piluchi; 78, T 110), S. bigemmatus nov.sp. (79, HT), S. bigemmosus nov.sp. (80, HT), S. bilunatior nov.sp. (PT, 81, T 43a; 82, 87, T 43b), S. biluminatus nov.sp. (83, PT, T 116), S. bistigmosus nov.sp. (84, 86, HT), S. stigmosus nov.sp. (PT, T 16), S. electrigemmeus nov.sp. (88, HT). Scale bar = 0.1 mm.

Figs 89-107: Anterior portion of the expulsion clasp of the aedeagus (89-95), trochanter of male (96), ventral aspect of aedeagus (97, 106, 107), metasternum of males (98-101), spermatheca and valvifera (102-105) of Stenus bilunatus PUTHZ (89, Chiayi Co.; 100, T 110; 105, Fenchihu; 106, T 28), S. bigemmosus nov.sp. (90, PT, Wulai), S. bigemmatus nov.sp. (91, 96, HT), S. bilunatoides nov.sp. (92, PT, T 22); S. bistigmosus nov.sp. (93, HT), S. biluminatus nov.sp. (94, T 11), S. rougemonti PUTHZ (95, HT), S. arisanus CAMERON (97, Alishan), S. coronatus L. BENICK (98, Yan Shan), S. coronatus zipanguensis PUTHZ (99, Mt. Kurofu), S. shibataianus nov.sp. (101, PT, Tengchih), S. biluminatus nov.sp. (102, PT, T 48), S. bilunatior nov.sp. (103, PT, T 133), S. bilunatoides nov.sp. (104, PT, T 71), S. miwai BERNHAUER (107, Keitou).