Eulonchopriini, Moure

Engel, Michael S. & Gonzalez, Victor H., 2022, A new bee genus from the pampas of eastern Argentina, with appended notes on the classification of “ paracolletines ” (Hymenoptera: Colletidae), Journal of Melittology 2022 (109), pp. 1-39 : 13-18

Key to Genera and Subgenera of Eulonchopriini

1. Metasomal terga I– IV of female and I– V or VI of male with enamel-like apical marginal zones of yellowish, green, bluish, or whitish, these zones usually at least partly impunctate and glabrous ........................................................ 2

—. Metasomal terga without enamel-like apical marginal zones, with setae and punctures near apical margins that are concolorous with other parts of terga, or translucent or brownish ...................................................................................... 7

2(1). Punctation coarse and dense, with punctures contiguous or nearly so; metatibial setae of female shorter than metatibial diameter [female of Mimozibyne Engel unknown] ......................................................................................................... 4

—. Punctation not so coarse, moderate to fine and not so dense, with large interspaces among punctures; metatibial setae of female variable, but sometimes as long as or longer than metatibial diameter ..................................................... 3

3(2). Forewing with two submarginal cells; yellow metasomal bands setose; most metatibial setae of female shorter than metatibial diameter; metafemur and metatibia of male unmodified [ Brazil] ............................. Baptonedys Moure et al.

—. Forewing with three submarginal cells; yellow metasomal bands glabrous; many metatibial setae of female as long as or longer than metatibial diameter; metafemur of male crassate, metatibia of male swollen apically [ Argentina, Bolivia, Brazil] ................................................................. Nomiocolletes Brèthes

4(2). Preoccipital carina strong, often lamella-like; pronotum dorsolaterally with strong transverse carina or lamella extending onto pronotal lobe; pterostigma inside of marginal cell slightly concave to straight [Genus Eulonchopria Brèthes , s.l.] .................................................................................................................. 5

—. Preoccipital and pronotal carinae (or lamellae) absent; pterostigma inside of marginal cell convex .................................................................................................. 6

5(4). Facial fovea absent; omaular carina absent (i.e., anterior and lateral surfaces of mesepisternum not separated by carina); axilla simple; pterostigma inside of marginal cell slightly concave [ Bolivia, Brazil (Santa Catarina)] .......................... ........................................................................................ E. ( Ethalonchopria ) Michener

—. Facial fovea distinct; omaular carina present (i.e., anterior and lateral surfaces of mesepisternum separated by carina); axilla angulate; pterostigma inside of marginal cell straight [ Argentina to USA (Arizona)] .................................................... .................................................................................... E. ( Eulonchopria ) Brèthes, s.str.

6(4). Forewing with three submarginal cells; metasomal enamel-like bands narrower than median ocellar diameter; basal area of propodeum rugose; metepisternum transversely striate; metabasitibial plate of male acutely pointed apically, with carina extending to metatibial apex [southeastern Brazil, Peru] ... ......................................................................................................... Apatosigynes Engel

—. Forewing with two submarginal cells; metasomal enamel-like bands broader than median ocellar diameter; basal area of propodeum smooth; metepisternum punctate; metabasitibial plate of male broadly rounded apically, without longitudinal carina extending along length of metatibia [ Argentina (Salta), Paraguay] ...................................................................... Mimozibyne Engel

7(1). Labial palpi unremarkable; pretarsal claws with inner rami shorter than outer rami and differently shaped, at least in female, or, rarely, pretarsal claws simple .......................................................................................................................... 8

—. Labial palpi enormous, 8–9 mm long, in repose reaching metasomal sterna III or IV; pretarsal claws of both sexes deeply cleft, the two rami similar in shape and of almost equal length [ Brazil] ................................................ Niltonia Moure

8(7). Forewing with three submarginal cells ................................................................. 9

—. Forewing with two submarginal cells .................................................................. 15

9(8). Length of second medial cell 2× width or typically less (length from 1m-cu+M junction to 2m-cu+Cu junction, width from 1m-cu+Cu junction to 2m-cu+M junction ...................................................................................................................... 10

—. Length of second medial cell 2.1× width or more ............................................ 12

10(9). Dorsolateral angle of pronotum low, rounded, scarcely evident; metabasitibial plate of female distinct, setae short, appressed, different from those of adjacent areas, its marginal carinae clearly exposed ................................................ 11

—. Dorsolateral angle of pronotum produced as small tooth projecting upward and outward (smallest in male); metabasitibial plate of female not easily seen because setae are erect, similar to those of adjacent parts of metatibia, largely hiding marginal carinae [ Brazil] .................................................... Halictanthrena Ducke

11(10). Mesosoma dull, minutely roughened, almost lacking punctures; malar area as long as minimum diameter of flagellum; clypeus protuberant in lateral view by fully compound eye width; inner metatibial spur of female pectinate or coarsely ciliate [ Chile] ............................................................. Torocolletes Michener

—. Mesosoma with at least some areas of shining integument between strong punctures; malar area linear; clypeus not or litle protuberant; inner metatibial spur of female finely ciliate [ Brazil] ..................................... Actenosigynes Moure et al.

12(9). Metasomal sterna II– V of female with apical bands of long, dense setae forming a ventral scopa that partially obscures surfaces of sterna; basal vein confluent or nearly confluent with 1cu-a ............................................................................... 13

—. Metasomal sterna II– V of female with apical bands of sparse, simple setae not obscuring surfaces of sterna; basal vein slightly distad 1cu-a [ Chile] .................. .................................................................................................... Chilicolletes Michener

13(12). Metatibial and sternal scopal setae with numerous short, fine branches projecting laterally from rachis; marginal line simple; tergum I mate, finely imbricate with scatered punctures [Genus Holmbergeria Jörgensen , s.l.] ............ 14

—. Metatibial scopal setae dividing to form few major branches; sternal scopal setae simple; marginal line areolate; tergum I smooth and shining [ Brazil] ........... .................................................................................................. Hoplocolletes Michener

14(13). Subantennal sulcus of male litle over half as long as diameter of antennal torulus; supraclypeal and subantennal areas impunctate, shining, asetose, in conspicuous contrast to adjacent areas [Female unknown] [ Argentina, Paraguay] ........................................................ H. ( Holmbergeria ) Jörgensen, s.str.

—. Subantennal sulcus of male as long as torular diameter; supraclypeal and subantennal areas punctate, with setae [ Argentina] ........ H. ( Sarocolletes ) Michener

15(8). Pterostigma elongate, r-rs arising at or slightly beyond midlength; costal marginal of marginal cell 1.5–2.0× as long as pterostigma; propodeum usually with subhorizontal or sloping basal part curving onto steeply declivitous posterior surface; meso- and metatibial spurs not curved and coarsely pectinate; mandible of male simple or bidentate; volsella of male more or less horizontal, ventral, not ataining dorsum of genital capsule ......................................... 16

—. Pterostigma small, r-rs arising well beyond midlength; costal margin of marginal cell 2.5–3.0× as long as pterostigma; propodeum wholly declivitous in profile; mesotibial and both metatibial spurs strongly curved and coarsely pectinate, or outer metatibial spur of male sometimes dentate to nearly simple; mandible of male tridentate; volsella of male large, vertically expanded, reaching dorsum of genital capsule, bifid [ Argentina, Bolivia] ............ Brachyglossula Hedicke

16(15). Mandible of male simple; labrum about 6× as wide as long, in female with apicolateral lobe bearing part of marginal fringe of bristles [Genus Protodiscelis Brèthes , s.l.] ....................................................................................................... 17

—. Mandible of male with preapical tooth on upper margin, as in female, or rarely simple (if simple, then labial palpus subequal to much shorter than maxillary palpus); labrum 2–5× times as wide as long, without apicolateral lobe .......... 18

17(16). Glossal lobes not much longer than basal width; scopal setae of metatibia and sterna with numerous short, fine branches; clypeal margin of male unmodified, truncate [ Brazil, Paraguay] .......................... P. ( Protodiscelis ) Brèthes, s.str.

—. Glossa deeply divided, lobes elongate, 7–10× as long as basal width; scopal setae of metatibia and sterna simple, or those of metatibia with a few major branches; clypeal margin of male with short median lobe overhanging base of labrum [ Argentina, Brazil] ....................................................... P. ( Tetraglossula ) Ogloblin

18(16). Glossal lobes short, not much if any longer than basal width ...................... 19

—. Glossa deeply bifid, lobes about 5× as long as basal width [ Brazil] ...................... ............................................................................................... Glossopasiphae Michener

19(18). Labial palpus with five to nine palpomeres, longer than maxillary palpus; metatibia of male with strong carina from apex of metabasitibial plate to apex of metatibia [Genus Hexantheda Ogloblin , s.l.] ...................................................... 20

—. Labial palpus with four palpomeres (tetramerous), usually shorter than maxillary palpus; metatibia of male without longitudinal carina or, rarely, with weak carina arising behind apex of metabasitibial plate .................................... 21

20(19). Labial palpus with five palpomeres (pentamerous); apicolateral lobes of metasomal sternum VII of male small, rounded [ Brazil] ... H. ( Albinapis ) Urban & Graf

—. Labial palpus with six to nine palpomeres; apicolateral lobes of sternum VII of male well-developed [ Argentina, Brazil] ....... H. ( Hexantheda ) Ogloblin, s.str.

21(19). Metasomal sterna II– V of female with broad apical bands of relatively long, simple, or branched setae; metatarsus of male not especially elongate, metatarsomere II less than 3× as long as greatest breadth; tergum VII of male with pygidial area indicated only by lack of setae (but large and somewhat defined in Kylopasiphae Michener ) ............................................................................ 22

—. Metasomal sterna II– V of female covered with short, unbranched, erect setae enlarged and curved posteriorly at tips and of uniform length except longer on sternum II; metatarsus of male elongate, metatarsomere II well over 3× as long as broad; pygidial plate of male defined, at least posterior end limited by carina [ Argentina] ............................................................... Pygopasiphae Michener

22(21). Body metallic bluish or less frequently greenish; pretarsal claws simple or with inner rami reduced to small teeth, shorter than basal diameters of outer rami, or with longer, more typical rami; margin of metasomal sternum VI of male produced midapically as rounded setose lobe about one-third as wide as sternum, notched medially .............................................................................. 23

—. Body lacking metallic coloration, or, if metallic, then lower margin of median ocellus at or above upper tangent of compound eyes; inner rami of pretarsal claws strong, longer than basal diameters of outer rami, claws thus bifid, or, rarely with rami of each leg asymmetrical; margin of metasomal sternum VI of male broadly rounded, not produced midapically, with median notch, often broad and shallow .......................................................................... 25

23(22). Basal area of propodeum granular, mate, with marginal line weakly or coarsely areolate; pygidial plate with lateral margins straight to weakly concave; pretarsal claws with inner rami, inner ramus either reduced to small tooth or normal; mesoscutum and metasomal terga without long, shaggy, white setae, at most with greyish or sooty white setae on mesoscutum; inner metatibial spur of female pectinate .............................................................................. 24

—. Basal area of propodeum smooth, somewhat shining, with marginal line simple or with exceedingly faint indications of areolae; pygidial plate with lateral margins concave; pretarsal claws simple; mesoscutum and often metasomal terga with abundant, long, shaggy, white setae; inner metatibial spur of female ciliate [ Chile] .................................................................. Spinolapis Moure

24(23). Pretarsal claw with inner ramus reduced to minute tooth; marginal line narrow and faintly areolate; legs red to orange; pygidial plate with lateral margins straight [ Argentina] ............................................... Patagoniapis Engel, n. gen.

—. Pretarsal claw with inner ramus normal; marginal line broader, particularly basally, and strongly areolate; legs dark reddish brown; pygidial plate with lateral margins weakly concave [ Argentina] ...... Aenarete Engel & Gonzalez, n. gen.

25(22). Metasomal terga with tomentose apical bands (sometimes a bit worn in older specimens); metasomal sterna IV and V of male with well-developed apical bands .......................................................................................................................... 26

—. Metasomal terga without tomentose apical bands; only metasomal sternum V of male with apical band ........................................................................................ 28

26(25). Metasomal terga II– IV with short, white, apical tomentose bands; basal area of propodeum steeply sloping and short, shorter than metanotum, profile almost wholly declivitous, surface smooth to finely imbricate or granulose and basally rugulose; antenna and legs dark brown to black [Genus Belopria Moure , s.l.] ................................................................................................................ 27

—. Metasomal terga II– IV with long, strongly developed, white, apical tomentose bands; basal area of propodeum smooth, shining, weakly sloping, about as long as metanotum; antenna and legs red to orange [ Chile] .............................. ......................................................................................................... Edwyniana Moure

27(26). Basal area of propodeum granulose and rugulose basally, surface wholly declivitous, basal area poorly differentiated from posterior surface [ Chile] ................. .................................................................................... B. ( Ruzopria ) Engel, n. subgen.

—. Basal area of propodeum smooth to finely imbricate, with short, steeply sloping surface somewhat distinct from posterior surface [ Brazil] ..................................... .............................................................................................. B. ( Belopria ) Moure , s.str.

28(25). Metatibial scopal setae with long branches directed distad; sterna with setae simple or their branches directed distally; metasoma of male commonly rather slender, not flatened, usually distinctly different in shape from that of female ........................................................................................................................ 29

—. Metatibial and sternal scopal setae with numerous short, fine side branches projecting at right angles to rachis or curled basally; metasoma of male rather broad and flatened, resembling that of female in shape [ Argentina] .................. ......................................................................................... Sarocolletidion Engel, n. gen.

29(28). Metatibial scopa formed around metatibia without long, loose setae extending above and below; metabasitibial plate with carinate margins not hidden by hair; metasomal tergum VII of male with dull or shiny, usually ill-defined pygidial area, sometimes a longitudinal strip, sometimes a broader area narrowed posteriorly; sternum VII of male with well-developed apical lobes, two to four on each side, usually at two levels ............................................................ 30

—. Metatibia with a few long, loose setae fully half as long as metatibia on upper and lower margins; metabasitibial plate hidden by setae except sometimes at base; metasomal tergum VII of male with shiny, asetose, irregularly rough pygidial area, not narrowed posteriorly, defined across posterior border by weak carina, this area occupying much of dorsum of tergum; sternum VII of male with apical lobes much reduced, all in a single plane [ Argentina] .... Kylopasiphae Michener

30(29). Pretarsal claws with rami symmetrical; tarsomeres V and IV unmodified .... 31

— Pretarsal claws with rami asymmetrical; tarsomere V of each leg elongate and arched, with base set deeply into apex of preceding tarsomere [ Argentina] ........ ........................................................................................ Chrysopasiphae Engel, n. gen.

31(30). Metabasitibial plate acutely rounded or pointed apically; inner metatibial spur of female finely ciliate to sharply serrate, or, rarely, coarsely ciliate with 10 or more branches [Genus Perditomorpha Ashmead , s.l.] .......................................... 32

—. Metabasitibial plate broadly rounded apically, rarely acutely rounded at apex; inner metatibial spur of female coarsely pectinate, with 4–8 branches .......... 33

32(31). Inner metatibial spur finely ciliate to sharply serrate [ Argentina, Brazil, Colombia, Paraguay] .......................................... P. ( Perditomorpha ) Ashmead, s.str.

—. Inner metatibial spur coarsely ciliate, with 10 or more short, fine branches [ Argentina] ..................................................... P. ( Leucopasiphae ) Engel, n. subgen.

33(30). Integument of head and mesosoma with punctures small, fine, and dense or widely spaced, if dense on head, then mesoscutum with well-separated punctures on mesoscutal disc; metasomal punctation and tergal margins not as described below ........................................................................................................... 34

—. Integument of head and mesosoma coarsely, densely punctate, punctures virtually contiguous in most places; metasomal coarsely and densely punctured on terga I and II, remaining terga densely punctate but punctures smaller; apical margins of terga I and sometimes II upturned [ Brazil] ...... Sthenele Engel, n. gen.

34(33). Flagellum moderate to long, at least extending to tegula; metafemoral and metatibial scopal setae with branches pectinate along ill-defined rachis from point of branching to apex ...................................................................................... 35

—. Flagellum short, not ataining tegula; metafemoral scopal setae anteriorly and outer metatibial scopal setae plumose with branches on either side of distinct rachis ................................................................... Nanopasiphae Engel, n. gen.

35(34). Protarsus unmodified; clypeus and supraclypeal area with abundant punctures, both gently curved [Genus Bicolletes Friese , s.l.] .................................... 35

—. Protarsus shortened, at most as long as protibia, probasitarsus greatly shortened with a flat, translucent, inner apical process extending to base of protarsomere IV; clypeus with sparse punctures, supraclypeal area impunctate, clypeus and supraclypeal area comparatively flat [ Argentina] .... Stilbopasiphae Engel, n. gen.

35(34). Basal area of propodeum finely tessellate, coriaceous, or with fine transverse striations, less frequently smooth, with marginal line weakly or distinctly areolate .............................................................................................................................. 36

—. Basal area of propodeum smooth, shining, with marginal line almost entirely effaced [ Argentina] ............................................................... B. ( Bicolletes ) Friese, s.str.

36(35). Integument dark brown to black, sometimes with red on metasoma ......... 37

—. Integument of head and metasoma with prominent metallic blue highlights [ Argentina] ...................................................... B. ( Cyanopasiphae ) Engel, n. subgen.

37(36). Subhorizontal basal area of propodeum shorter than metanotum; 8–9 distal hamuli; marginal cell apex obliquely truncate and appendiculate; metasoma largely reddish [ Chile] ..................................... B. ( Erythropasiphae ) Engel, n. subgen.

—. Subhorizontal basal area of propodeum as long as or typically longer than metanotum; 5–7 distal hamuli; marginal cell apex rounded, sometimes feebly appendiculate; metasoma typically black to dark brown, sometimes with areas of reddish [ Argentina, Bolivia, Brazil, Paraguay, Peru] .................................................... .............................................................................. B. ( Bicolletopsis ) Engel, n. subgen.