Incasarus Gonzalez, Rasmussen, & Engel, 2013

Gonzalez, Victor H., Rasmussen, Claus & Engel, Michael S., 2013, Incasarus garciai, a new genus and species of panurgine bees from the Peruvian Andes (Hymenoptera: Andrenidae), Journal of Melittology 8, pp. 1-9 : 3-6

Incasarus Gonzalez, Rasmussen, & Engel , new genus

ZooBank urn:lsid:zoobank.org:act:7F729602-E30A-4A36-8D92-319948C72214

TYPE SPECIES: Incasarus garciai Gonzalez, Rasmussen, & Engel , new species .

DIAGNOSIS: The new genus can be recognized easily by the following combination of characters: body predominantly dark brown to black with reduced yellow maculations ( Figs. 4, 5 ); forewing with two submarginal cells; propodeum setose; mesoscutum smooth and shiny between fine, contiguous punctures ( Fig. 8 ); dorsal surface of propodeum about as long as metanotum; anterior tentorial pit in epistomal sulcus, below intersection between outer subantennal and epistomal sulci; male seventh tergum strongly projected medially ( Fig. 11 ); fourth sternum with two premarginal combs of thick, simple setae medially ( Fig. 12 ); fifth sternum with long, thick, simple setae medially on premarginal line ( Fig. 13 ); sixth sternum with broad U- or V-shaped midapical emargination ( Fig. 14 ); seventh sternum with apodemes and apical lobes broad, short, attached to a large disc ( Fig. 15 ); and genitalia with gonostylus about as long as gonocoxite, simple, without apical lobes or projections, with long, thick mid-ventral and apical setae, and articulated to gonocoxite ( Figs. 18‒20 ).

DESCRIPTION: ♂: Moderate-sized bees (7–8 mm in length); color dark brown to black, nonmetallic, without yellow maculations except on clypeus; integument largely smooth and shiny between punctures, especially on dorsal surface of mesosoma; punctures coarser, denser on head than on meso- and metasoma; pubescence whitish, sparse, longer and denser on head and mesosoma than on metasoma; metasomal terga with distal margins glabrous, narrow; second metasomal tergum with postgradular area as shallow as on remaining terga. Head broader than long, broader than mesosoma; mandible edentate, pointed; labrum with strong ridge bordering glabrous, impunctate, triangular basal area; clypeus more than twice broader than long; supraclypeal area elevated along midline; lower mesal paraocular area distinctly swollen ( Fig. 6 ); anterior tentorial pit in epistomal sulcus, below intersection between outer subantennal and epistomal sulci; antennal toruli about at middle of face; antennal scape unmodified, not surpassing lower tangent of median ocellus in repose; antennal flagellum unmodified, slightly shorter than head width; facial fovea well-marked, ovoid; compound eyes slightly convergent ventrally; lower margin of median ocellus coinciding with upper orbital tangent; vertex gently convex; gena narrower than compound eye in profile, widest medially; labiomaxillary complex of moderate length, not distinctly elongate. Pronotal collar rounded, not carinate; dorsal surface of propodeum gently sloping, areolate. Forewing with pterostigma more than three times longer than broad, slightly wider than prestigma, margin basal to vein r-rs slightly divergent from costa, that within marginal cell straight or nearly so; marginal cell obliquely and broadly truncate at apex, appendiculate, about as long as distance from its apex to wing tip; two submarginal cells, first submarginal cell slightly shorter than second; basal vein gently curved; 1m-cu distal to 2Rs (second free abscissa Rs, or first submarginal crossvein sensu Michener, 2007); 2m-cu basal to 2rs-m (second submarginal crossvein sensu Michener, 2007); jugal lobe about two-thirds length of vannal lobe; hind wing with second abscissa of M+Cu about four times length of cu-a; 8 distal hamuli. Legs unmodified; mesotibial spur about half mesobasitarsal length; outer surfaces of pro- and mesotibia apically with small posterior spine; metabasitibial plate carinate, slightly broader apically, with scattered, semierect, short, stiff setae basally on disc ( Fig. 10 ); metatibia about twice as long as metabasitarsus, with posterior marginal carina weakly toothed basally; keirotrichia on inner surface except on anterior and posterior margins; inner metatibial spur slightly curved at apex, outer spur shorter and more strongly curved at apex than inner; metabasitarsus strongly projecting on posterodistal margin; pretarsal claws cleft, symmetrical or nearly so. Second metasomal tergum with well-marked lateral fovea; seventh tergum without pygidial plate, distal margin strongly projected medially ( Fig. 11 ); fourth sternum with two medial premarginal combs of thick, simple setae ( Fig. 12 ); fifth sternum with long, thick, simple setae medially on premarginal line ( Fig. 13 ); sixth sternum with broad U- or V-shaped midapical emargination ( Fig. 14 ); seventh sternum with apodemes short, apical lobes broad, short, attached to large disc ( Fig. 15 ); eighth sternum longer than broad, midapical projection long, slightly longer than disc ( Figs. 16, 17 ); genital capsule longer than broad, gonobase absent ( Figs. 18‒20 ); gonostylus about as long as gonocoxite, simple, without apical lobes or projections, with long, thick mid-ventral and apical setae, articulated to gonocoxite; volsella simple, not differentiated in digitus and cupis; penis valves simple, short, apices not surpassing basal one-fourth of gonostylar length (measured in ventral view); penis membranous, bilobed, shorter than penis valves.

ETYMOLOGY: The new genus-group name is a combination of Inca, referring to the pre-Columbian civilization that occupied most of the Andes, and - sarus, a stem commonly used in a number of related panurgine genera. The name is masculine.

Figures

Figures 4–10. Male holotype of Incasarus garciai, new species. 4. Dorsal habitus. 5. Lateral habitus. 6. Facial view. 7. Detail of mandible in profile. 8. Detail of vertex and mesosoma in dorsal view. 9. Detail of metasoma. 10. Metabasitibial plate.

Figures 11–20. Male holotype of Incasarus garciai, new species. 11. Detail of seventh metasomal tergum. 12. Fourth sternum. 13. Fifth sternum. 14. Sixth sternum. 15. Seventh sternum. 16, 17. Eighth sternum in ventral view and profile. 18‒20. Genital capsule in dorsal, ventral view, and profile.