Macroderes arrowi Janssens, 1939

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 : 44

Macroderes arrowi Janssens, 1939

( Figs. 4 , 59 , 70 )

Macroderes arrowi Janssens, 1939: 26 ; Ferreira 1969: 320; Frolov & Scholtz 2005: 389.

Type locality. South Africa, Cape Prov, 11 Km N v Rhynsdorp [Vanrhynsdorp: 31°37'S 18°44'E] .

Type material examined. None. Type series is deposited in IRSNB ( Frolov & Scholtz 2005).

Additional material examined. 2 ♂♂ and 2 ♀♀ ( UPSA): “ RSA / Western Cape Prov / 11 Km / N of Vanthynsdorp / A. Frolov & C. Deschodt leg // AF-00 45 (25) / 5–11. IX. 2003 / S 31. 3028.28° E 018.4302.56°” ; 2 ♀♀ ( UPSA): “ South Africa / Western Cape Prov / 124 km N of / Sandveld / S31.49859° E018.71642° / 15. 8. 2015 / C. Deschodt & W. P. Strümpher leg” .

Size range. Males length: 9.9–11.7 mm, width: 6.3–8.3 mm; females length: 9.7–10.5 mm, width: 6.5–7.7 mm.

Differential diagnosis. Due to it is carinate margins of elytra ( Fig. 70 ) M. arrowi resembles M. foveatus , M. cornutus and M. greeni , however, it can be easily distinguished from the two former species as it lacks the deep triangular concavity at the base of the pronotum ( Fig. 4 ) and from all others by having a granular pronotum ( Fig. 59 ) instead of rounded punctures found in M. greeni and longitudinal punctures in M. cornutus and M. foveatus .

Habitat and distribution. So far this species is only known from Vanrhynsdorp and Sandveld areas ( Fig. 2). The two localities are situated in the Western Cape Province. Vanrhynsdorp is an arid area close to Namaqualand’s coast. The area is covered by succulent vegetation and characterised by rather humid climate and low annual rainfall. Sandveld situated to the west of the Cedarberg Mountains and is characterised by a rich biodiversity of animals and plants.

Figures

FIGURES 3–6. Habitus of Macroderes species. 3, M. amplior Frolov & Scholtz, 2005; 4, M. arrowi Janssens, 1939; 5, M. cornutus Frolov & Scholtz, 2005; 6, M. endroedyi Frolov & Scholtz, 2005.

FIGURES 58–63. Punctuation of the base of pronotum of Macroderes species. 58, M. greeni (Kirby, 1818); 59, M. arrowi Janssens, 1939; 60, M. bias (Olivier, 1789); 61, M. namakwanus Frolov & Scholtz, 2005; 62, M. endroedyi Frolov & Scholtz, 2005; 63, M. politulus Preudhomme de Borre, 1880.

FIGURES 70–75. Sculpture of second elytra intervals of Macroderes species. 70, M. arrowi Janssens, 1939; 71, M. cornutus Frolov & Scholtz, 2005; 72, M. endroedyi Frolov & Scholtz, 2005;73, M. foveatus Frolov & Scholtz, 2005; 74, M. mutilans Kolbe, 1908; 75, M. namakwanus Frolov & Scholtz, 2005.