Meridiobolbus natalensis,

Gussmann S. M. & Scholtz, C. H., 2000, Systematic revision of endemic southern African genera of Bolboceratinae (Coleoptera: Scarabaeoidea: Bolboceratidae), Journal of Natural History 34, pp. 1045-1123: 1092-1093

publication ID 10.1080/00222930050020122

persistent identifier

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scientific name

Meridiobolbus natalensis

spec. nov.

Meridiobolbus natalensis  spec. nov.

(®gures 9a±e, 15e, f, 16g ±i, 18b, 20)


Body length. Holotype 10.6 mm.

Colour. Dark brown.

Head. Outer margin of mandible rounded (®gure 15e). Labrum (®gure 15e) declivous anteriad and posteriad from obsolete transverse carina; anterior margin distinctly sinuate. Clypeus (®gures 15e, 18b) with strongly elevated anterior transverse carina, straight in dorsal view; with well-de®ned, short diagonal, posteriorly steeply inclined carina, the latter connecting the antero-lateral marginal angle and the respective endpoint of the transverse anterior carina; with distinct lateral carina from endpoint of anterior carina extending to above antennal insertion, there forming a distinct angular elevation, from which extending posteriorly in a slightly curved line past eye-canthus on frons to about middle of the eye. Frons (®gures 15e, 18b) with strongly elevated, feebly trituberculate transverse carina, positioned in line with postero-lateral angle of eye-canthi.

Pronotum (®gure 18b). With four very feebly tuberculate swellings in anterior third; area anterior to protuberances strongly declivous and feebly concave; with feebly indented midline, not reaching anterior declivous part or posterior pronotal margin; with ®ne punctures in posterior half, interspersed by some large punctures, especially along midline; ®ne punctation increasingly replaced by large, partly con- ¯uent punctures anteriorly and towards sides; protuberances with ®ne punctures only.

Scutellum (®gure 15f). Basal width about 1.25Ölength; with some large, shallow punctures in the middle, and scattered small punctures.

Elytron (®gure 15f). Striae moderately impressed, their punctures small and separated by two to four puncture diameters; intervals with double punctation (approximately three ®ne and 10 minute punctures between two striae).

Legs. Protibia six-dentate. Metafemur with punctation and setation of ventral side as in Bolboceratex  , ®gure 24e. Metatibia in lateral view only feebly broadening towards apex; with subapical carina distinctly bilobed; with toothlike projections arranged in two rows above subapical carina.

Male genitalia. Aedeagus as in ®gure 16g ±i.

Distribution (®gure 19). The species is known only from the type locality in north-eastern Kwazulu-Natal, South Africa.

Type material examined. HOLOTYPE:l`Mkuzi [27.39S 32.14E], Zululand, Dec., 1945, Light-Trap, DDT No. 492’`near indubium’ [handwriting Andreae, curator ex SAMC]/`m’ [incorrect]/`SAM ’ [black print on white label] ( SAMC).GoogleMaps 

Comments. Although no other specimens are known besides the type, there is no doubt that Meridiobolbus natalensis  is a new species. The aedeagus is distinct but the apical projections of the parameres in dorsal view link it to Meridiobolbus  . The four pronotal protrusions also place the species with the latter genus rather than with Namibiobolbus  . In the absence of any additional material it can only be assumed that external sexual dimorphism exists with Meridiobolbus natalensis  to the same degree as with the congeneric species.


Iziko Museums of Cape Town