Baeocera omnigena Löbl, 2021

Löbl, Ivan & Smetana, Aleš, 2021, On the Baeocera Erichson (Coleoptera: Staphylinidae: Scaphidiinae) of Sabah, Malaysia, and a tale on mystified biodiversity, J. Insect Biodiversity 23 (2), pp. 23-42 : 27-28

Baeocera omnigena Löbl , sp. nov.

urn:lsid:zoobank.org:act:731A359F-F8D0-414D-A52E-570B120B1865

( Figs 1–3 )

Material examined. Holotype ♂, SABAH: Poring Hot Springs, 500 m 13.V.1987 Burckhardt – Löbl ( MHNG) .

Description. Length 1.40 mm, width 1.0 mm. Body fairly dark reddish-brown with darkened mesoventrite, metaventrite and ventrites I to IV. Apical abdominal segments yellowish. Femora and tibiae reddish-brown, paler than elytra, tarsi and antennae yellowish. Head with interocular distance about as dorsoventral eye diameter. Lateral contours of pronotum and elytra continuously arcuate. Pronotum not microsculptured, with punctation very fine, hardly visible at 40 times magnification, lateral margin carinae not visible in dorsal view. Minute tip of scutellum exposed, rounded. Elytra not microsculptured, with lateral margins rounded, lateral margin carinae visible in dorsal view only near bases, sutural striae starting near base, parallel, curved along bases to form complete basal striae joined with lateral striae, adsutural areas flat, distinctly punctate. Elytral disc with punctation posterior of narrow impunctate base coarse and dense, punctures mostly smaller than puncture intervals. Hind wings fully developed. Hypomera appearing impunctate. Mesoventrite with longitudinal striae, lacking mesal ridge. Mesepimera about twice as long as wide and hardly longer than intervals to coxae. Middle of metaventrite convex, impunctate except for transverse row of coarse punctures near posterior margin and few less coarse punctures on anterior intercoxal process. Lateral area of metaventrite with conspicuous, impressed, dense row of coarse punctures along posterior margins, and coarse puncture on anterior area and along metanepisterna, impunctate between transverse puncture row and submesocoxal areas. Submesocoxal areas 0.02 mm long, margined by punctures about as those on lateral areas of metaventrite. Metanepisterna distinct, about 0.04 mm broad, parallel, with straight, punctate suture. Tibiae straight. Ventrite I lacking striae, with punctures margining base not elongate, about as large as those on sides of metaventrite, not interrupted at middle, punctation posterior of basal row coarse, irregularly scattered. Punctation on following ventrites very fine and sparse, hardly visible at 40x magnification.

Male characters. Protarsomeres I to III hardly widened. Aedeagus ( Figs 1–3 ) 0.38 mm long. Median lobe in dorsal view gradually narrowed apically, with tip acute and not bent; apical process inflexed, with unsplit dorsal side, about as long as half of basal bulb, ventral contour of apical process in lateral view oblique. Articular process not prominent. Parameres wide, weakly sclerotized, with shallow notch and narrowed apically, hardly bent in dorsal view, straight in lateral view. Internal sac lacking sclerites, with striate, proximally bent tube.

Differential diagnosis. The species in external characters is similar to members of the B. serendibensis , B. lenta and B. ceylonensis groups. It may be distinguished from its congeners by the punctation of the metaventrite, notably by the conspicuous, impressed antecoxal puncture row.

Distribution. East Malaysia. Sabah.

Etymology. The species epithet is Latin meaning of different ways or manner.

Figures

Figures 1–7. Baeocera spp., aedeagi; (1, 2) B. omnigena sp. nov., in dorsal and lateral views, internal sac extruded, scale = 0.1 mm; (3) ditto, paramere in ventral view, scale = 0.05 mm. (4, 5) B. rudis sp. nov., in dorsal and lateral views, scale = 0.1 mm; (6) ditto, paramere in ventral view, scale = 0.05 mm; (7) ditto, internal sac in dorsal view, scale = 0.05 mm.