Bolbelasmus concavisuturalis Li & Wang, 2024

Li, Chun-Lin & Wang, Chuan-Chan, 2024, A systematic review of the genus Bolbelasmus Boucomont (Coleoptera, Geotrupidae, Bolboceratinae) from Indochina and surrounding areas, ZooKeys 1191, pp. 287-305 : 287

publication ID	https://dx.doi.org/10.3897/zookeys.1191.114021
publication LSID	lsid:zoobank.org:pub:F412786C-54D1-408D-8BC7-D630A05F086F
persistent identifier	https://treatment.plazi.org/id/B3BDDA3C-0CE3-4ACF-9470-E2750D968B93
taxon LSID	lsid:zoobank.org:act:B3BDDA3C-0CE3-4ACF-9470-E2750D968B93
treatment provided by	ZooKeys by Pensoft
scientific name	Bolbelasmus concavisuturalis Li & Wang
status	sp. nov.

Treatment

Bolbelasmus concavisuturalis Li & Wang sp. nov.

Figs 1 View Figures 1–6 , 2 View Figures 1–6 , 11 View Figures 11–16 , 17 View Figures 17–22 , 23 View Figures 23–28 , 29 View Figures 29–38 , 30 View Figures 29–38 , 39 View Figures 39–43 , 44 View Figures 44–51 , 45 View Figures 44–51

Type materials.

Holotype male. "Mon-Angget, near Chiangmai, North Thailand, 31-V-1990, K. Masumoto leg." (glued on label, NSMT). Paratypes. 1♂ (ZMUC) "Northern Thailand, Doi Sutep, 21.6.1958, B. Degerbøl leg., Pr. 548 (1.7.59)". 1♀ (NSMT) "Doi Suthep, Chiang Mai, Thailand, 15-VIII-1989, Y. MANIT leg."

Description.

Holotype male (Figs 1 View Figures 1–6 , 2 View Figures 1–6 ). Body length 10.2 mm; width across humeri 6.3 mm. Dorsum distinctly shiny. Head, pronotum and scutellum reddish brown with elytra brown in color. Head (Fig. 11 View Figures 11–16 ): labrum with anterior margin crenulate, disc transversally rugose. Clypeus trapezoidal, surface densely rugopunctate; protrusion at basal angle reduced. Clypeofrontal suture well defined, distinctly curved in front of frontal tubercle. Frons with surface sparsely punctate, punctures fine, frontal tubercle vertically located in junction of suture, triangular in lateral view. Eye prominent, canthus simple, not exceeding eye. Thorax: pronotum (Fig. 17 View Figures 17–22 ) quadrituberculate, tubercles situated in a line, lateral tubercle smaller; anterior face of median tubercles almost perpendicular to surface of pronotum; primary punctures weakly defined, sparse on disc except between lateral margin of pronotum and fovea, these coarser and denser, line in front of scutellum with a coarse puncture, secondary punctures tiny, evenly scattered on surface of pronotum; frontal and lateral margins beaded, posterior margin beaded only anterior to humeri of elytra. Scutellum elongate, secondary punctures sparsely distributed. Elytron (Fig. 23 View Figures 23–28 ): elytral striae shallowly impressed, punctures mostly spaced 2-3 times diameters of punctures. Intervals flat, with sutural interval weakly concave, surface scattered with secondary punctures. Male genitalia (Figs 29 View Figures 29–38 , 30 View Figures 29–38 , 39 View Figures 39–43 ).

Female paratype (Figs 44 View Figures 44–51 , 45 View Figures 44–51 ). Body length 9.8 mm; width across humeri 5.8 mm. Similar to male with minor differences in the form of strongly wrinkled surface of clypeus, transverse frontal carina trilobed, central lobe more prominent than lateral lobes, punctures on frons and vertex rugose, transverse pronotal carina feebly bilobed, lobes broad, punctures on pronotal disc coarser and denser than those of males.

Male paratype. The single male paratype is smaller in body size, 9.4 mm in length and 5.1 mm in width across humeri, frontal tubercle less developed and with three coarse punctures along pronotal posterior margin in front of scutellum.

Diagnosis.

Bolbelasmus concavisuturalis sp. nov. is morphologically similar to B. coreanus , but can be distinguished from the latter by having denser punctures along the midline of the pronotum (Fig. 17 View Figures 17–22 ) (sparser punctures in B. coreanus (Fig. 22 View Figures 17–22 )), punctures in elytral striae moderately developed (Fig. 23 View Figures 23–28 ) (punctures weakly developed in B. coreanus (Fig. 28 View Figures 23–28 )) and ventrally curved parameres (straight in B. coreanus ).