Pectinosoma Arrow, 1913

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 : 42

Pectinosoma Arrow, 1913

Type species

Pectinosoma elongata Arrow, 1913 (designation: monotypy).

Diagnosis

Pronotum−scutellum contact slightly sinuous (similar to Fig. 8 E ); male mesotarsomeres I−IV wider than long and with external projection; internal area of metatarsomere V with spine-like setae; male ventrite V with medial lobe bearing truncate setae in transverse palisade ( Fig. 14 D–E); female pygidium with sinuous apex ( Fig. 14 F–G).

Remarks

The genera Ancistrosoma , Chariodema , Faula , Manopus , Pectinosoma and Pseudopectinosoma are similar to each other. They have a sinuous pronotum−scutellum contact and separate meso- and metacoxae. In Ancistrosoma and Pectinosoma the prosternum has a prominent posterior process (simple in Ancistrosoma ( Fig. 14 A ); bifid in Pectinosoma ). Other distinctive characters of Pectinosoma are (opposition to 1, Ancistrosoma ; 2, Pseudopectinosoma ): pronotum−scutellum contact slightly sinuous (similar to Fig. 8 E ) (1, 2, strongly sinuous, Fig. 8 A ); male ventrite V with medial lobe bearing truncate setae in transverse palisade ( Fig. 14 D–E) (1, ventrite I with an acute process ( Fig. 14 A ); 2, ventrite VI with a raised area); female pygidial anterior margin straight and posterior margin deeply sinuous ( Fig. 14 F–G) (1, anterior margin sinuous and posterior margin slightly sinuous ( Fig. 14 B–C); 2, anterior margin straight and posterior margin slightly sinuous). The notes about Pseudopectinosoma are based on its original description ( Katovich 2011).

Figures

Fig. 8. A−E. Pronotum−scutellum contact. F. Protibia. A. Ancistrosoma klugii Curtis, 1835. B. Chariodema virescens Blanchard, 1842. C. Ceraspis bivulnerata (Germar, 1824). D. Faula cornuta Blanchard, 1850. E−F. Manopus biguttata Conte de Castelnau, 1840. Scale bars = 1 mm.

Fig. 14. A, D. Male habitus, lateral (without some appendages). B–C, F–G. Female abdomen detail (lateral, posterior). E. Male abdomen detail, ventral. H–I. Aedeagus (lateral, parameres apex). A–C. Ancistrosoma klugii Curtis, 1835. D–I. Pectinosoma elongata Arrow, 1913.