Bolbelasmus yutangi 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/A57879F9-F8A6-4D40-B922-DF3429C8BA4D
taxon LSID	lsid:zoobank.org:act:A57879F9-F8A6-4D40-B922-DF3429C8BA4D
treatment provided by	ZooKeys by Pensoft
scientific name	Bolbelasmus yutangi Li & Wang
status	sp. nov.

Treatment

Bolbelasmus yutangi Li & Wang sp. nov.

Figs 9 View Figures 7–10 , 10 View Figures 7–10 , 15 View Figures 11–16 , 21 View Figures 17–22 , 27 View Figures 23–28 , 37 View Figures 29–38 , 38 View Figures 29–38 , 43 View Figures 39–43 , 50 View Figures 44–51 , 51 View Figures 44–51

Type materials.

Holotype male. "Myanmar: Bago Region, Moe Yin Gyi, CCCC, 21.V.2017. leg. Y.-T. Wang." (glued on label, TARI). Paratypes. 1♀(TARI). data as the holotype. 5 ♂♂ (TARI). "China: Yunnan, Wudian (武甸), 17.IX.2014. leg. Y.-T. Wang". 1♀ (CCLI) "China: Yunnan, Banggunjianshan (邦棍尖山), 18.IX.2015. leg. Y.-T. Wang". 6♂♂ (CCLI). "China: Yunnan, Bangdashan (邦達山), 01.IX.2015. leg. Y.-T. Wang". 1♂ (CCLI). "China: Yunnan, Ruili (瑞麗), 15.IX.2014. leg. Y.-T. Wang". 1♂ (NSMT). "Doi Saket, Chiang Mai, Thailand, 12-X-1989, Y. MANIT leg". 1♂ (NSMT). "Doi Mon Unggate, Samoeng Distr., Chiang Mai Prov., Thailand, 18-VII-1989, Y. MANIT leg".

Description.

Holotype male (Figs 9 View Figures 7–10 , 10 View Figures 7–10 ). Body length 9.3 mm; width across humeri 5.9 mm. Dorsum moderately shiny. Head, pronotum and scutellum dark brown with elytra reddish brown. Head (Fig. 15 View Figures 11–16 ): labrum with anterior margin crenulate, disc transversally rugose. Clypeus trapezoidal, surface densely rugopunctate; protrusion at basal angle moderately developed. Clypeofrontal suture well defined, slightly curved in front of frontal tubercle. Frons with surface moderately punctate, punctures coarse, frontal tubercle vertically located at center of disc, triangular when viewed laterally. Eye prominent, canthus simple, not exceeding eye. Thorax: pronotum (Fig. 21 View Figures 17–22 ) quadrituberculate, tubercles placed in a line, lateral tubercle greatly reduced in size; anterior face of median tubercles almost perpendicular to plane of pronotum; primary punctures coarse, dense on disc with small impunctate area in front of middle of posterior margin, punctures between lateral margins of pronotum and fovea bigger and denser, scattered coarse punctures distributed along posterior margin with seven punctures in front of scutellum, secondary punctures tiny, evenly scattered on surface of pronotum; frontal and lateral margins beaded, posterior margin beaded only in front of elytral humeri. Scutellum elongate, fine punctures sparsely distributed on surface. Elytron (Fig. 27 View Figures 23–28 ): elytral striae shallowly impressed, punctures mostly spaced by 1-3 times diameters of punctures. Intervals slightly convex, including sutural interval, surface with scattered secondary punctures. Male genitalia. Figs 37 View Figures 29–38 , 38 View Figures 29–38 , 43 View Figures 39–43 .

Female (Figs 50 View Figures 44–51 , 51 View Figures 44–51 ). Body length 8.4-8.7 mm; width across humeri 5.1-5.3 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, with lobes broadly developed to reduced, bigger punctures on pronotal disc denser than those of males and scutellum with 1 or 2 bigger punctures.

Variation in male. Male paratypes differ from the holotype in the following respects: smaller body size, 6.6 mm in body length and 5.2 mm in width across humeri, frontal tubercle less developed and not in junction of clypeofrontal suture, pronotal tubercle feebly convex, reduced, and number of coarse punctures along pronotal posterior margin variable.

Diagnosis.

Bolbelasmus yutangi is similar to B. nativus in sharing the frontal tubercle location at the center of the frons as well as having smaller parameres. It can be distinguished from the latter by the weakly convex basal angle of the clypeus (distinctly bulging in B. nativus ), primary punctures densely distributed on the disc (almost impunctate along the middle of disc in B. nativus ), sutural interval convex, similar to discal intervals (distinctly more convex than discal intervals in B. nativus ) and parameres with the tips tapered (parameres broader at tips in B. nativus ).

Distribution.

Eastern Myanmar, northern Thailand and western Yunnan, China (Fig. 52 View Figure 52 ).

Etymology.

Bolbelasmus yutangi sp. nov. is named after Mr Yu-tang Wang, a beetle enthusiast of Taiwan, who collected most of the material used in this study.

Species with doubtful locality record