Baryopsis minor, Assing, 2012

Assing, V., 2012, On the Baryopsis species of Peru (Coleoptera: Staphylinidae: Paederinae: Cryptobiina), Linzer biologische Beiträge 44 (1), pp. 335-346 : 340-342

Baryopsis minor nov.sp. ( Figs 15-21 )

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 minor sp.n. det. V. Assing 2011" (cAss). Paratypes: 3♀♀, 1 larva: same data as holotype (cAss).

D e s c r i p t i o n: Body length 8.0- 8.5 mm. Habitus as in Fig. 15 . Coloration: forebody dark-brown; abdomen reddish-brown; legs and antennae reddish-brown to darkbrown; maxillary palpi reddish.

Head ( Fig. 16 ) almost 1.1 times as long as broad; lateral margins convex, gradually curving towards neck in dorsal view; posterior angles obsolete; dorsal surface, except median dorsal portion, with sparse macropunctation; micropunctation variable, sparse in median dorsal portion, sparse to moderately dense in lateral and posterior dorsal portions; interstices with microreticulation composed of fine isodiametric to longitudinally elongate meshes; surface with subdued shine. Eyes small, weakly projecting from lateral contours of head and 1/5-1/4 the length of postocular region in dorsal view.

Pronotum ( Figs 17-18 ) relatively short and broad, approximately 1.15 times as long as broad and 1.10-1.15 times as wide as head; maximal width approximately in the middle; lateral margins almost regularly convex in dorsal view; dorsal series composed of 6-10 macropunctures; micropunctation absent; microreticulation in median dorsal portion composed of longitudinal meshes.

Elytra extremely short, approximately 0.55 times the length of pronotum; posterior margin obliquely truncate; dorsal surface with shallow, often ill-defined macropunctures; micropunctation indistinct. 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 fine; 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 convex, without sexual dimorphism.

3: protarsomeres I-IV distinctly dilated; sternite VII not distinctly modified; sternite VIII with rather deep, narrowly V-shaped posterior excision ( Fig. 19 ); aedeagus ( Figs 20-21 ) approximately 0.9 mm long; ventral process short and apically rounded in ventral view; parameres distinctly projecting beyond apex of ventral process.

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

E t y m o l o g y: The specific epithet (Latin, adjective, comparative of minus: small) alludes to the small body size, one of the characters distinguishing B. minor from other congeners known from Peru.

C o m p a r a t i v e n o t e s: Baryopsis minor is readily distinguished from all its Peruvian congeners by its small body size, the longitudinal microsculpture of the head and pronotum, the shapes of head and pronotum, the paler coloration, and the 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. One larva, which probably belongs to this species, was collected in the same locality.

Figures

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.