Spinoliella propinqua Gonzalez and Engel, 2017
Gonzalez, Victor H., Smith-Pardo, Allan H. & Engel, Michael S., 2017, Phylogenetic Relationships Of A New Genus Of Calliopsine Bees From Peru, With A Review Of Spinoliella Ashmead (Hymenoptera: Andrenidae), Bulletin of the American Museum of Natural History 2017 (412), pp. 1-72 : 54-58
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|Spinoliella propinqua Gonzalez and Engel|
DIAGNOSIS: This species is most similar to S. maculata . The female can be separated from that species by the sculpturing of the discs of the mesoscutum and mesoscutellum, which are shiny, with micropuntures shallow and often faint (fig. 17F), and thus appearing imbricate particularly on disc of mesoscutellum (mesoscutum and mesoscutellum dull, minutely and contiguously punctate among large, setiferous punctures in S. maculata : fig. 11D), and the pygidial plate narrow, with lateral margins converging toward apex at a 50° angle (fig. 17G) (lateral margins converging toward apex at a 60° angle in S. maculata ). The male can be separated by the pubescence of the depressed apical margins of T5 and T6, which are largely asetose with decumbent setae present only on at most basal half (largely covered by decumbent setae except on apical third in S. maculata ). Also, both sexes of S. maculata are slightly larger ( S. propinqua : head width, female 2.3 mm, male 2.5 mm; S. maculata , female 2.5 mm, male 2.9 mm).
DESCRIPTION: Female. Total body length 8.2 mm (7.7‒8.8 mm); forewing length 5.3 mm (4.8‒5.7 mm); head width 2.3 mm (2.1‒2.5 mm). Head 1.3× wider than long; inner orbits of compound eyes subparallel (fig. 17A); intertorular distance 2.8× OD, about 1.2× greater than torulorbital distance; torulus diameter about equal to OD; ocellocular distance 2.5× OD, about as long as ocelloccipital distance; interocellar distance 2.4× OD, about as long as ocellocular distance; compound eye 2.3× longer than wide; clypeus medially projected on distal margin (fig. 17B), 2.8× broader than long, with apex surpassing inferior tangent of compound eyes by about one-half its length, projected about 0.4× compound eye width in lateral view; gena 0.7× width of compound eye in profile, widest medially; inner subantennal sulcus about one-half length of outer subantennal sulcus; facial fovea deep, forming a groove, about same width along its length, 0.7× narrower than scape, about 6.2× longer than broad, 1.4× longer than scape; scape 3.1× longer than broad; pedicel slightly shorter than F1, about as long as broad; F1 1.6× longer than F2, 1.3× broader than long; F2 about as long as F3; remaining flagellomeres broader than long, except last flagellomere longer than broad. Pro- tibial spur with apical portion of rachis about two-thirds length of malus, with distinct row of eight elongate branches (not including apical portion of rachis); mesotibial spur straight, about one-half mesobasitarsus length; mesobasitarsus slender, about 3.8× longer than broad; metatibial spurs straight, inner spur about 1.6× longer than the outer spur; metabasitibial plate slightly concave on disc, delimited by strong border (fig. 17C); metatibia 4.2× longer than broad; metabasitarsus 7.7× longer than broad, about 0.6× length of metatibia. Pygidial plate with lateral margins converging toward apex at 40° angle, apex bifid (fig. 17G).
Head and mesosoma predominantly black (fig. 17D, E), legs and metasoma dark reddish brown (fig. 17D). Cream to yellowish maculation as follows (fig. 17A–B, D, E): mandible except apical half; labrum basally; clypeus except basally on disc and distal margin submedially; supraclypeal area; paraclypeal swelling; subantennal area; ventral surface of flagellum yellowish; dorsal surface of pronotum with small lateral spot; apex of pro- and metafemora; base of tibiae; T1– T5 each with a lateral band, gap between bands narrowest on T1 (about one-half width of transverse width of lateral band), widest on T2 (about 1.5× width of transverse width of lateral band). Tegula translucent brownish; wing membranes brownish, with weak green and copper highlights, veins dark brown.
Body pubescence as in S. confusa , except as follows: setae whitish except on vertex with dark brown to gray setae, and outer surfaces of metatibia and tarsi of all legs, and metasoma with light reddish brown setae.
Outer surface of mandible distally and basal area of labrum smooth and shiny, impunctate; clypeus smooth and shiny, with faint punctures separated by 1–2× a puncture width on disc, punctures absent preapically, denser laterally; paraclypeal swelling and subantennal area impunctate (fig. 17B); supraclypeal area smooth and shiny, laterally with scattered, small punctures as on lower paraocular area; remaining areas of face minutely punctate among large, scattered setiferous punctures, paraocular area lateral to torulus weakly shiny, with micropunctures faint to nearly absent lateral to facial fovea, integument otherwise dulled by micropunctation; gena smooth and shiny among scattered setiferous punctures separated by at least 2× a puncture width; hypostomal area faintly imbricate to smooth and shiny, setiferous punc- tures sparser than on gena. Mesosoma, including legs, generally faintly imbricate to smooth and shiny between punctures, except: tegula, mesoscutum and mesoscutellum minutely punctate among setiferous punctures, disc of mesoscutum with faint micropunctures and sparse setiferous punctures (fig. 17F) (separated by at least 2× a puncture width); dorsal and posterior surfaces of propodeum alveolate; mesepisternum and propodeum laterally strongly imbricate. Metasoma strongly imbricate with minute, scattered punctures on terga, punctures coarser and denser on sterna and terminal terga.
Male. As in female except pubescence longer and denser with brownish setae on mesoscutum, mesoscutellum, and propodeum; integumental tergal bands slightly more broadly separated medially (fig. 18C, G), and the following: total body length 7.7‒8.5 mm; forewing length 5.2‒5.7 mm; head width 2.3‒2.6 mm. Head 1.3–1.4× wider than long; intertorular distance 2.7× OD, 1.1× greater than torulorbital distance; ocellocular distance about 0.7× ocelloccipital distance; interocellar distance about as long as ocellocular distance; compound eye 2.1× longer than wide; clypeus 3.9× broader than long; gena 0.9× width of compound eye in profile; facial fovea about 4.0× longer than broad, widest medially (0.5× width of scape), 0.6× length of scape; scape 3.0× longer than broad; pedicel slightly shorter (0.9×) than F1, 1.2× longer than long; F1 1.5× longer than broad, 1.7× longer than F2 and F3 individually. Protibial spur with apical portion of rachis about one-half length of malus, protibial spur with apical portion of rachis with distinct row of nine to 10 elongate branches; mesotibial spur 0.4× mesobasitarsus length; inner metatibial spur 1.3× longer than outer spur; metabasitibial plate delimited by weak border, not as strong as in female (fig. 18E); metabasitarsus 6.2× longer than broad (fig. 18F). Metasomal S7, S8, and genital capsule as in figure 18H–K.
Mesoscutum and mesoscutellum duller than in female, micropuntures well marked throughout. Metasomal sterna faintly imbricate to
smooth and shiny on discs, each coarsely, densely punctate laterally.
HOLOTYPE: ♀, Chile: Region VII [Maule], Lga del Maule [Laguna del Maule], Cuesta de los Condores, 35°57′461″[S], 070°34′844″[W], 29.xii.06 [29 December 2006], L. Packer ( PCYU).
PARATYPES (n = 6♀♀, 7♂♂): CHILE: Maule (R-VII): 4♀♀, 4♂♂, with same data as holotype (1♀, 1♂ MNHN, 1♀, 1♂ PCYU, 1♀, 1♂ PUCV, 1♀, 1♂ SEMC); 1♀, 2♂♂, Region VII, NW of L. Maule [Laguna del Maule], 1435 m, S35.55086, W70.62662, 4.i.2009 [4 January 2009], L. Packer, Andeimalva chilensis, PCYUCHI 09-6-2-009, 010, 011 ( PCYU); 1♂, Region VII, Hwy 115 to L. Maule [Laguna del Maule], ~ 1900 m, 4.i.2009 [4 January 2009], L. Packer, Andeimalva chilensis (PCYU) ; 1♀, E. of Laguna del Maule, 1359 m, -35.90163, -70.64261, 6.i.2013, L. Packer, ex: Primula (PCYU) .
ETYMOLOGY: The epithet specific is derived from propinquus (Latin, “neighboring”), and refers to its near resemblance to S. maculata .
DISTRIBUTION: Chile: Maule (R-VII).
COMMENTS: This species is known from only a couple of localities, which are at midelevations (1359–1900 m) in central Chile, and thus found at higher elevations than in S. maculata (11–900 m).
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