Baryopsis ingens, Assing, 2012

Assing, V., 2012, On the Baryopsis species of Peru (Coleoptera: Staphylinidae: Paederinae: Cryptobiina), Linzer biologische Beiträge 44 (1), pp. 335-346 : 338-340

Baryopsis ingens nov.sp. ( Figs 8-14 )

T y p e m a t e r i a l: Holotype 3: " Peru - Cusco, P. Abra / Malaga , 4000 m, 20.IV.1990, leg. Etonti / Holotypus 3 Baryopsis ingens sp.n. det. V. Assing 2011" (cAss) . Paratype ♀ [teneral]: same data as holotype (cAss) ; 4 larvae: same data as holotype (cAss) .

D e s c r i p t i o n: Body length enormous, 14-18 mm. Forebody as in Fig. 8 . Coloration: body, including legs, blackish; antennae dark-brown; maxillary palpi darkreddish.

Head ( Fig. 9 ) almost 1.1 times as long as broad; lateral margins weakly convex in dorsal view; posterior angles obsolete, i.e., lateral angles convexly curving towards neck posteriorly; dorsal surface with sparse coarse macropunctation and with dense micropunctation; median dorsal portion without macropunctures; interstices with pronounced microreticulation composed of fine isodiametric meshes; surface almost matt. Eyes small, weakly projecting from lateral contours of head and approximately 1/5 the length of postocular region in dorsal view.

Pronotum ( Figs 19-11 ) 1.20-1.25 times as long as broad and approximately 0.9 times as wide as head; maximal width near anterior margin, gradually tapering posteriorly; lateral margins almost straight in dorsal view, near posterior angles weakly sinuate; dorsal series somewhat irregular and composed of 10-12 macropunctures; micropunctation very indistinct, barely visible in the pronounced microsculpture; microreticulation similar to that of head.

Elytra extremely short, little more than 0.5 times the length of pronotum; posterior margin obliquely truncate; dorsal surface somewhat rugosely sculptured, with ill-defined, shallow macropunctures and with extremely fine, barely noticeable micropunctation; surface somewhat glossy. Hind wings completely reduced. Metatarsomere I longer than II, but slightly shorter than the combined length of II and III.

Abdomen distinctly wider than forebody, widest at segment VI; punctation dense and coarse; interstices glossy, with very fine, barely noticeable microsculpture composed of transverse meshes; posterior margin of tergite VII without palisade fringe; posterior margin of tergite VIII obtusely angled in the middle, without sexual dimorphism.

3: protarsomeres I-IV strongly dilated; sternite VII weakly impressed posteriorly; sternite VIII with moderately deep, broadly V-shaped posterior excision ( Fig. 12 ); aedeagus ( Figs 13-14 ) approximately 2.1 mm long; ventral process long and slender; parameres not reaching apex of ventral process.

♀: protarsomeres I-IV distinctly dilated, but less so than in male.

E t y m o l o g y: The specific epithet (Latin, adjective: enormous) alludes to the enormous size of this species.

C o m p a r a t i v e n o t e s: Baryopsis ingens is readily distinguished from all its Peruvian congeners by its large size in combination with extremely short elytra alone. In addition, it is characterised by the pronounced microreticulation of head and pronotum, the shape of the pronotum, the coarse and dense punctation of the abdomen, the shallower excision of the male sternite VII, as well as by the distinctive morphology of the aedeagus.

D i s t r i b u t i o n a n d n a t u r a l h i s t o r y: Thetypelocalityissituatedin the southern Peruvian Andes at an altitude of 4000 m. The paratype is distinctly teneral. Four larvae, which evidently belong to this species, were collected in the same locality.

Figures

Figs 8-14: Baryopsis ingens nov.sp., holotype: (8) forebody; (9) median portion of head; (10-11) median portion of pronotum; (12) male sternite VIII; (13-14) aedeagus in lateral and in ventral view. Scale bars: 8, 12-14: 1.0 mm; 9-10: 0.5 mm; 11: 0.1 mm.

Figs 15-21: Baryopsis minor nov.sp., holotype: (15) habitus; (16) median portion of head; (17-18) median portion of pronotum; (19) male sternite VIII; (20-21) aedeagus with internal sac extruded in lateral and in ventral view. Scale bars: 15: 1.0 mm; 19-21: 0.5 mm; 16-18: 0.2 mm.