Byrasba Harold, 1869

Fuhrmann, Juares & Vaz-De-Mello, Fernando Z., 2017, Macrodactylini (Coleoptera, Scarabaeidae, Melolonthinae): primary types of type species and taxonomic changes to the generic classification, European Journal of Taxonomy 350, pp. 1-71 : 21-22

Byrasba Harold, 1869 , revalidated

Barybas Burmeister, 1855: 20 (non Blanchard 1850).

Byrasba Harold, 1869: 122 (replacement name for Barybas Burmeister ).

Byrasba – Katovich 2008: 6 (synonymy with Rhinaspis Perty, 1833 ).

Type species

Barybas volvulus Burmeister, 1855 (designation: monotypy).

Diagnosis

Pronotal anterior and posterior margins not beaded ( Fig. 2 B ), posterior margin prominent with a medial tooth ( Fig. 2 B ); prosternum anteriorly concave (similar to Fig. 12 K ); protibia with three external teeth and without spur ( Fig. 2 B ); male protarsomere I with an internomedial tooth and II–VI with external projection ( Fig. 2 B ); elytron with five longitudinal grooves between internal margin and humerus, lateral margins beaded, posterior and posterointernal margins not beaded; metatarsomere V without internoproximal spine-like setae; abdomen with intersegmental membrane VII–VIII concealed.

Remarks

See Agaocnemis . The present study revalidates Byrasba , formerly a synonym of Rhinaspis , based on the following characters (opposition to Rhinaspis ): pronotal lateral margins straight ( Fig. 2 B ) (crenulate, Fig. 10 D–F); posterior margin prominent with a medial tooth ( Fig. 2 B ) (posterior margin not prominent and unarmed, Fig. 10 D–F); protibial spur absent (present); protarsomeres II–IV with externodistal projection (without projection); elytron with five weakly prominent lines between internal margin and humerus (with three lines).

Figures

Fig. 2. ♂♂. A–D. Head–prothorax dorsal, tarsus rotated laterally to apex. E–G. Metatibia. H–I. Aedeagus (lateral, parameres apex). A, E. Agaocnemis pruina Moser, 1918. B, F, H–I. Byrasba volvula (Burmeister, 1855). C, G. Hamatoplectris caracana Frey, 1969. D. Hieritis macrocera Burmeister, 1855. Scale bars = 1 mm.

Fig. 12. ♂♂. A. Head–prothorax dorsal, tarsus rotated laterally to apex. B. Antenna. C. Protibia−tarsus. D−I. Aedeagus (lateral, parameres apex). J. Metatibia. K. Head−prothorax, ventral. A, F−G. Euryaspis obesa (Burmeister, 1855) comb. nov. B−E. Euryapsis gaudichaudi Blanchard, 1850. H−J. Philochloenia amata nom. nov. K. Philochloenia castaneipennis (Guérin-Méneville, 1831) comb. nov. Scale bars = 1 mm.

Fig. 10. A−B, D−F. Head−pronotum, dorsal. C. Head−prothorax, lateroventral. G. Metatibia, internal. A. ♀. B−G. ♂. H−K. Aedeagus (lateral, parameres apex). A−C, H−I. Ceratolontha venezuelae Arrow, 1948. D. Rhinaspis aenea Billberg, 1820. E. Rhinaspis ohausi Moser, 1921. F−G, J−K. Rhinaspis aeneofusca Moser, 1919. Scale bars = 1 mm.