Stenus shibataiellus, 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 : 582

Stenus shibataiellus nov.sp. ( Figs 34 , 111 )

T y p e m a t e r i a l: Holotype (): Taiwan: Nantou Hsien: near Piluchi , 1.IV.1984, Y. Shibata: in coll. Shibata.

D e s c r i p t i o n: Micropterous, black with a faint brownish hue, each elytron with a slightly elevated oval orange spot (34); forebody coarsely and densely punctate, abdomen moderately coarsely, moderately densely punctate; pubescence short, recumbent. Antennnae reddish yellow, club infuscate. Maxillary palpi yellowish, segment 3 slightly infuscate. Paraglossae oval. Legs reddish brown. Clypeus black, labrum dark brown, moderately densely pubescent.

Length: 4.6 mm (forebody: 2.3 mm).

PM of the HT: HW: 40.5; DE: 23; PW: 31; PL: 33; EW: 37; EL: 36.5; SL: 25; SpL: 15.

M a l e:Sameas S. electristigma . Aedeagus (fig. 111), similar to that of S. shibatai , but larger, outline of apical portion of median lobe slightly but distinctly different, expulsion hooks of slightly different shape, weakly sclerotized flagelliform tube broder; parameres same as in S. shibatai , but with 3+6 apical setae.

F e m a l e: Unknown.

C o m p a r a t i v e n o t e s: This new species can only be distinguished from S. electristigma by the different aedeagus. In the single specimen (HT) the elytral spot is smaller than in the compared species, but this character might be variable.

From S. shibataianus the new species may be distinguished by much deeper reticulation of the abdomen and by the male sexual characters.

This species belongs to the S. indubius -group. For identification amongst the Taiwanese species see key.

E t y m o l o g y: This is species is named in honour of Mr. Yasutoshi Shibata (Tokyo), who collected the type specimen.

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 108-121: Ventral aspect of aedeagus/apical portion oft the median lobe (108-111, 114, 116- 119), spermatheca (112, 113, 15), apical portion of valvifer (120, 121) of Stenus mithracifer nov.sp. (108, HT), S. shibatai nov.sp. (109, PT), S. shibataianus nov.sp. (110, HT; 112, 120, PTT), S. shibataiellus nov sp. (111, HT), S. electristigma nov.sp. (113, 117, 121, PTT), S. cirricinctus PUTHZ (14, HT), S. arisanus CAMERON (115, Alishan), S. electrigemmeus nov.sp. (116, HT), S. stigmosus nov.sp. (116, PT), S. stigmifer nov.sp. (119, HT). Scale bar = 0.1 mm (108 = 109-115, 120, 121; 116 = 117-119).