Macroderes pristinus Sharp, 1880

Abdalla, Ishtiag H., Deschodt, Christian M., Scholtz, Clarke H. & Sole, Catherine L., 2018, An update to the taxonomy of the genus Macroderes Westwood 1842 (Coleoptera: Scarabaeidae: Scarabaeinae) with descriptions of new species from South Africa, Zootaxa 4504 (1), pp. 41-75 : 70-72

Macroderes pristinus Sharp, 1880

( Figs. 100–102 )

Macroderes pristinus Sharp, 1880: 38 ; Péringuey 1901: 304; Janssen 1939: 29; Ferreira 1968: 322; Frolov & Scholtz 2005: 392.

Type locality. Diamonds fields, S[outh] Africa.

Type material examined. Holotype, ♀ ( MNHN): “ Macroderes pristinus / Type / D [David]. S [Sharp] / Diamonds fields / S. a[A]frica [hand written]” // “EX. Musaeo / D [David]. Sharp 1890 [printed]” // “MUSEUM PARIS / 1952 / COLL / R. OBERTHUR [printed]” // “ HOLOTYPE [red label, printed] // HOLOTYPE / Macroderes pristinus Sharp 1880 [printed]".

Differential diagnosis. This species is similar to M. bias females through the combination of the following characters: punctate lateral borders of pronotum, elytra stria 9 contiguous to elytra stria 10, even punctuation of pronotum, anterolateral depressions of pronotum and the dense punctate and shagreened elytra, however, M. pristinus can be distinguished from M. bias by having a more punctuated, flatter elytra striae.

Remarks. We agree with Frolov & Scholtz (2005) in that this species is very close to females of M. bias and probably the same species. We compared the holotype of M. pristinus with females of M. bias and insignificant differences are noted between the two species. The most significant difference is that the elytral striae in M. pristinus are much flatter and densely punctuated than those of M. bias . The examined material show many common characteristics summarized as follows: the punctate lateral borders of pronotum, elytra stria 9 very close to elytra stria 10, regular rounded punctures of pronotum, the excavation of pronotum antero-laterally and the shagreened elytra with dense punctuation.

Although the validity of the species is questioned, it is not possible to transfer it to M. bias as the species has been described from a single female specimen and collected from a different site opposite to M. bias range of distribution. Additional male and female specimens from the type locality may provide more evidence of the taxonomic status of the species.

Figures

FIGURES 100–102. Holotype of M. pristinus Sharp, 1880 and the label associated with the specimen. 100, dorsal view; 101, lateral view; 102, ventral view.