Aegidiini, Paulian, 1984

Colby, Julia, 2009, Monographic revision of the genus Aegidinus Arrow (1904) and generic phylogeny of the world Orphninae (Coleoptera: Scarabaeidae: Orphninae)., Insecta Mundi 2009 (76), pp. 1-41 : 12-13

Key to the genera of the Aegidiini

1. Clypeus reflexed, bifurcate in frontal view ( Fig. 31 ), or slightly reflexed, but not bifurcate (females, minor males). Pronotum with dense punctures; punctures vermiform to U-shaped, setigerous ( Fig. 32 ). Elytra with contiguous U-shaped punctures, each puncture with a seta in the center ( Fig. 32 ). Length less than 8 mm. Brazil, Peru. ( Fig. 32 and 33 ) .............................................. ................................................................. Paraegidium Vulcano, Pereira, and Martinez

— Clypeus never reflexed and bifurcate in frontal view. Pronotum densely punctate to impunctate; punctures rarely vermiform to U-shaped, never setigerous. Elytra punctate to impunctate; punctures never contiguous and U-shaped or setose. Length 6-15 mm. ( Fig. 34-37 , 81 , 83-87 , 90-91 ) ........................................................................................................................................ 2

2(1). Labrum semicircular, exerted beyond clypeus ( Fig. 1 ). Mandibles with single, external, lateral lobe ( Fig. 1 ). South America and Trinidad. Length 6-12 mm. ( Fig. 81 , 83-87 , 90-91 ) ............... ..................................................................................................................... Aegidinus Arrow

— Labrum not exerted beyond clypeus; mandibles without external lateral lobe. ( Fig. 34-37 ) ...... 3

3(2). Mesofemur (ventral view) ( Fig. 19 ) with ridge along posterior edge; surface posterior to ridge minutely roughened in both males and females (may be more visible in males). Yucatan peninsula to Bolivia, including Dominica, St. Vincent, and Guadeloupe. Length 9-20 mm. ( Fig. 34-35 ) .. ............................................................................................................... Aegidium Westwood

— Mesofemur (ventral view) ( Fig. 18 ) without ridge along posterior edge; surface smooth ( Fig. 36- 37 ). Coastal Brazil. Length 8-15 mm ..................................................... Aegidiellus Paulian

Figures

Figure 31-33. Paraegidium costalimai. 31) Clypeus (frontal view). 32) Dorsal habitus of female. Note vermiform punctures on pronotum and U- shaped punctures on elytra. 33) Dorsal habitus of male.

Figures 34-37. 34) Aegidium sp. male dorsal view. 35) Aegidium sp. female, dorsal view. 36) Aegidiellus alatus male, dorsal view. 37) Aegidiellus alatus female, dorsal view.

Figures 78-81. 78) Elytra of Aegidinus sp. Arrow indicates transverse row of U- or V- shaped, impressed lines. 79) Lateral view of elytra. Arrow indicates location of margin adjacent to humerus. 80) Procoxa (dorsal surface), showing two setose pits. 81) Ventral view of A. oreibates female.

Figure 83- 87. Scale bar = 1 mm. 83) Lateral 3/4 habitus of A. cornutus. Arrow indicates tubercle. 84) Dorsal habitus of A. crypticus. 85) Lateral habitus of A. crypticus. Arrow indicates boss. 86) Lateral 3/4 habitus of A. guianensis. Arrow indicates tumosity.87) Dorsal habitus of A. guianensis. Arrow indicates fovea.

Figure 90-91. Aegidinus oreibates female. Scale bar = 1 mm. 90) Dorsal habitus. Arrow indicates depression. 91) Lateral habitus.

Figure 1-9. Scale bar = 1 mm. 1) Mouthparts exposed beyond clypeus. a) Labrum exposed beyond edge of clypeus. b) Single, external, lateral lobe on mandibles. 2) Apical spines of metatibia (indicated by arrows) separated by basal metatarsal segment. 3) Female genital sclerites of Aegidinus brasiliensis Arrow. a) Superior sclerite. b) Inferior sclerite. c) Interior process. 4). Female genital sclerites of A. oreibates Colby. a) Superior sclerite. b) Inferior sclerite. c) Accessory sclerite. 5) Male parameres (frontal view) of A. oreibates. a) Lateral lobe. b) Median lobe. 6) Male parameres (frontal view) of A. brasiliensis. a) Lateral lobe. b) Median lobe. 7) Male parameres and phallobase (lateral view) of A. guianensis (Westwood). a) Lateral lobe. b) Median lobe. c) phallobase. d) Basal piece of phallobase. 8) Attachment of first antennal club segment to stem offset (Hybalus sp.). 9) Attachment of first antennal club segment to stem not offset (Orphnus sp.).

Figure 15-21. Scale bar = 1 mm. 15) Prefemoral cleaning brush composed of a line of setae (Madecorphnus sp.). 16) Prefemoral cleaning brush composed of a patch of setae (Aegidium sp.). 17) Prefemoral cleaning brush composed of a line and a patch of setae (Orphnus sp.). 18) Mesofemur without ridge along posterior edge (Aegidiellus alatus). 19) Mesofemur with ridge along posterior edge; surface posterior to ridge minutely roughened (Aegidium sp.). Arrow indicates position of ridge. 20) Ventral view of Brenskea coronata. a) Mesocoxae contiguous. b) Mesometasternum unsutured. 21) Ventral view of Orphnus sp. a) Mesocoxae separated. b) Meso- metasternum sutured.