Bolbelasmus meridionalis Krikken, 1977

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/E0B0EB6A-0CC3-5F4C-A382-A1C954C295D7
treatment provided by	ZooKeys by Pensoft
scientific name	Bolbelasmus meridionalis Krikken, 1977
status

Treatment

Bolbelasmus meridionalis Krikken, 1977 View in CoL

Figs 5 View Figures 1–6 , 6 View Figures 1–6 , 13 View Figures 11–16 , 19 View Figures 17–22 , 25 View Figures 23–28 , 33 View Figures 29–38 , 34 View Figures 29–38 , 41 View Figures 39–43 , 48 View Figures 44–51 , 49 View Figures 44–51

Bolbelasmus meridionalis Krikken, 1977: 285. Original combination (type locality: Java, Indonesia); Král, Löbl and Nikolajev 2006: 83 (catalog, subgenus Bolbelasmus Kolbeus ); Nikolajev, Král and Bezdӗk 2016: 33 (catalog, subgenus Bolbelasmus Kolbeus ).

Material examined.

(11♂♂, 8♀♀). 1♂ (NSMT). Thailand: Sansai , Chiang Mai, 17. VI. 1993 (1 male at NSMT) . 9♂♂, 7♀♀ (NSMT); same locality, 12-V-1996 . 1♀ (NSMT); near Chiang Mai, N Thailand, VII-1996, native collector . 1♂ (NSMT). Taiwan: Formosa , Heito, 10-VII-1941, H. Kondo / Sizumu Nomura Bequest, 1981 .

Diagnosis.

Body length, males, 6.1-8.2 mm, greatest width at pronotal base, 3.7-5.0 mm; females, 5.6-8.2 mm in length, 3.3-5.2 mm in width. Both B. meridionalis and B. minutus constitute a distinctive group among southeastern Asian congeners based on sharing the distinctly convex elytral sutural intervals and the tips of the parameres acute and curved ventrally in lateral view. Due to a lack of further material being available of the later species, B. meridionalis and B. minutus can only be separated by the shape of male genitalia and the lateral margin of the pronotum in B. meridionalis , which is more widely explanate than that of B. minutus .

Chinese name.

脊背厚角金龜

Notes.

Li et al. (2008) excluded B. meridionalis from the registered Taiwan fauna due to the lack of verified records. During the present study, we examined a male B. meridionalis specimen housed in NSMT bearing identical labels as the paratype of the species collected in Heito (now Pingtung) by the late Japanese coleopterist, Yushiro Miwa. We therefore confirm the record of B. meridionalis in Taiwan, though it has been lacking in reports of the genus for 90 years. Consequently, the conservation status of B. meridionalis in Taiwan is in urgent need of study, along with that of B. minutus Li & Masumoto, 2008 and Bolbotrypes davidis (Fairmaire, 1891). These species are restricted to habitats in highly urbanized areas and/or intensively farmed plains of Taiwan.

Distribution.

Indonesia (Java); eastern China; Thailand; Vietnam; Taiwan.

Remarks.

Bolbelasmus meridionalis has the widest known distribution among congeners in the region in eastern and southeastern Asia. Also, the records from Java for the holotype and paratypes indicated that it is the only member from the Sunda Islands of the genus.