Stenus bigemmosus, 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

Stenus bigemmosus nov.sp. ( Figs 40 , 64 , 80 , 90 )

T y p e m a t e r i a l: Holotype and 2 - paratypes: TAIWAN: Taipei Hsien: Wulai , 24.- 30.IV.1992, leg. A. YOSHII . Paratypes: 1, 5: Nantou Hsien: Lushan Wenchuan , 1200 m, 28.VII.1982, 3. and 5.VIII. 1985, leg. Y. SHIBATA ; 2, 2: Hualien Hsien: near Juisui , 29.III.1984, 29.III.1986, leg. Y. SHIBATA ; 1: Ilan Hsien: Fushan Botanical Garden , swept from vegetation, 8.-11.IV.2002, leg. O. MERKL.- HT and PTT in coll. Y. Shibata (Tokyo), PTT also in the Hungarian Natural History Museum, Budapest and in cP .

D e s c r i p t i o n: Macropterous, black with a faint lustre, each elytron with an oval orange spot in posterolateral quarter (fig. 40); punctuation coarse and very dense; pubescence short, recumbent. Antennae brownish, club infuscate. Maxillary palpi reddish yellow, segment 3 slightly infuscate. Paraglossae coniform. Legs reddish brown, apical portion of tarsal segments infuscate. Clypeus black, labrum dark brown, anterior margin brown, moderately sparsely pubescent.

Length: 6.5-7.0 mm (forebody: 3.1-3.4 mm).

PM of the HT: HW: 50.5; DE: 30; PW: 40.5; PL: 47.5; EW: 54; EL: 57; SL: 44; SpL: 19.

M a l e: Similar to S. bilunatus , but the anterior portion of the median lobe more rounded and weakly sclerotized anteriorly (fig. 64), the expulsion clasp less broad and more rounded at the serrate anterior portion (figs 80, 90).

F e m a l e: Same as in S. bilunatus .

C o m p a r a t i v e n o t e s: In general facies this new species looks highly similar to S. bilunatus and the measurements would fall into the variability range of that species (HW: EW = 0.83-0.94, ø 0.908; SpL: EL = 0.26-0.34, ø 0.30; N= 16), but the aedeagal differences do not agree with S. bilunatus .-).- For identification amongst the Taiwanese species see key.

E t y m o l o g y:" bigemmosus " (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).