Tetartopeus baicalicus ( EPPELSHEIM 1878)

Assing, V., 2011, On some East Palaearctic Tetartopeus species (Coleoptera: Staphylinidae: Paederinae), Linzer biologische Beiträge 43 (2), pp. 1179-1197 : 1191-1193

Tetartopeus baicalicus ( EPPELSHEIM 1878) ( Figs 52-59 )

Lathrobium sibiricum EPPELSHEIM 1876: 433 f.; primary homonym.

Lathrobium baicalicum EPPELSHEIM 1878: 424 ; replacement name.

T y p e m a t e r i a l e x a m i n e d Syntype: "sibiricum mihi. Baikal-See / Type / c. Epplsh. Steind. d. / Typus / Lathrobium baicalicum Epp. verum! Smetana det. 1960 / Tetartopeus baicalicus (Eppelsheim) , det. V. Assing 2011" (NHMW).

C o m m e n t: The original description of Lathrobium sibiricum is based on an unspecified number of females from "Ost-Sibirien" deposited in the Eppelsheim collection ("In meiner Sammlung") ( EPPELSHEIM 1876). Having realized that the name was a junior primary homonym of L. sibiricum FAUVEL 1875 , EPPELSHEIM (1878) replaced it with the

new name L. baicalicum . One female syntype, probably the only one that ever existed, was located in the Eppelsheim collection at the NHMW.

D i a g n o s i s: Lengthofforebody 3.3-3.8 mm. Body blackish-brown to black, elytra without yellowish spots; legs reddish to reddish-brown. Elytra short, approximately 0.7 times as long as pronotum ( Fig. 52 ).

: tergite VIII weakly angled posteriorly ( Fig. 53 ); sternite VIII longitudinally impressed in the middle, posterior half of median line narrowly semi-transparent and without pubescence, on either side of semi-transparent portion with extensive cluster of very dense black setae, posterior incision relatively deep and narrow ( Fig. 54 ); aedeagus approximately 1.5 mm long, ventral process relatively massive and apically acute ( Figs 55- 56 ), dorsal plate apically rounded.

: tergite VIII angularly produced posteriorly ( Fig. 57 ); posterior margin of sternite VIII convexly produced in the middle ( Fig. 58 ); tergite X in posterior half strongly convex in cross-section, but without median carina ( Fig. 59 ).

C o m p a r i s o n: Tetartopeus baicalicus is most similar to T. zetterstedti , but distinguished by the reddish to reddish-brown legs ( T. zetterstedti : legs dark-brown to blackish-brown), the shorter head, and by the sexual characters.

D i s t r i b u t i o n: According to SMETANA (2004), T. baicalicus is distributed in West and East Siberia, the Russian Far East, and Mongolia.

Figures

Figs 52-59: Tetartopeus baicalicus (EPPELSHEIM) (57-59: syntype): (52) forebody; (53) male tergite VIII; (54) male sternite VIII; (55-56) aedeagus in lateral view; (57) posterior margin of female tergite VIII; (58) female sternite VIII; (59) female tergite X. Scale bars: 52: 1.0 mm; 53-59: 0.5 mm. A d d i t i o n a l m a t e r i a l e x a m i n e d: Russia: 1, Primoskiy Kray, 70 km N Chuguyevka, 5 km SE Samarka, Gordeyevskaya mt., 44°46'N, 134°13'E, 300 m, 29.V.1993, leg. Zerche (SDEI); 2, 2: "Quellgebiet des Irkut, Leder" (NHMW, cAss); 1, "O. Sibirien" (NHMW).