Orasema peckorum Heraty & Baker 2020, sp. nov.

Orasema peckorum sp. nov. (lasallei species group)

(Figures 2, 4a – c)

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Diagnosis

Recognised by the labrum with 8 digits, frons rugulose, lower face irregularly rugosereticulate, scape and legs yellow, mesosoma coarsely rugose-areolate and bluish green with reddish patches, and fore wings pilose but with the basal area and speculum bare and the speculum closed basally by a broad band of setae. Basal third of hind wing microsetose, and costal cell with scattered setae in apical half. Closest to O. lasallei and O. vasqueszi, but these have a distinctly costate frons.

Female. Length 4.87 mm.

Colour: Head and mesosoma blue green, darker ventrally; mesosoma with reddish patches on anterior midlobe, axillae, a medial line on scutellar disc, and the frenal line. Scape, pedicel and anellus yellow; flagellum brown. Mandible yellowish-brown with teeth dark brown; maxilla and labium yellowish brown. Fore and mid coxa yellowish-brown, mid coxa with dark brown lateral channel; hind coxa brown dorsally to yellow ventrally; remaining legs yellow. Fore wing hyaline; venation yellowish brown. Petiole blue-green; gaster brown, Mt 1 darker brown dorsally and with purplish reflections.

Head in frontal view subtriangular; head width 1.25× height; frons rugulose to rugosereticulate dorsally, lower face lateral to clypeal area reticulate, upper frons with weak vertical carinae; scrobal depression shallow, laterally rounded, weakly rugulose; eyes bare, inter-ocular distance 1.7× eye height; malar space 0.8× eye height; supraclypeal area about as long as broad, shorter than clypeus, mostly smooth; clypeus smooth; epistomal sulcus distinct and sharply defined; anterior tentorial pit strongly impressed; anteclypeus weakly differentiated, clypeal margin broadly rounded. Labrum with 8 digits. Mandibular formula 3:2 [?, only partially visible]. Palpal formula 3:3. Occiput aciculate, shallowly emarginate in dorsal view, dorsal margin abrupt; temples broad. Scape not reaching median ocellus. Pedicel globose, broader than F1. Flagellum with 8 funiculars; flagellum length 1.2× head height; anellus disc-shaped; F2 narrower than pedicel, 2.8× as long as broad, 1.4× as long as F3; following funiculars subequal in length, equal in width; clava subconical.

Mesosoma length 1.0× height. Mesoscutal midlobe rugose-reticulate, more smoothly reticulate anteriorly, bare; lateral lobe areolate-reticulate; notauli deep. Axilla rugosereticulate, dorsally rounded, on roughly same plane as scutellum; scutoscutellar sulcus broad, regularly foveate, broadly separated from transscutal articulation medially; scutellar disc slightly longer than broad, coarsely rugose-areolate; frenal line irregularly foveate; frenum rugulose; axillular sulcus absent; axillula areolate. Propodeal disc broadly rounded, without depression or carina, irregularly rugose-areolate; callus weakly rugulose, bare; callar nib absent. Prepectus triangular dorsally, strongly narrowed ventrally, sculpture reticulate. Mesepisternum areolate-reticulate laterally, smooth ventrally, broadly rounded anterior to mid coxa. Upper mesepimeron mostly smooth; lower mesepimeron reticulate; transepimeral sulcus weakly impressed. Metepisternum laterally irregularly reticulate. Propleuron convex, weakly reticulate. Postpectal carina prominent. Hind coxa 1.8× as long as broad, completely reticulate; hind femur 6.0× as long as broad, with short, dense setae apically; hind tibia densely setose. Fore wing 2.6× as long as broad, 2.5× as long as mesothorax; basal cell and speculum bare, but speculum closed by setae basally, costal cell and wing disc densely setose; marginal fringe relatively long; submarginal vein with several long setae in basal half, with smaller setae apically; marginal vein pilose; stigmal vein more than 2.5x as long as broad, slightly angled; uncus absent; postmarginal vein 2.2× as long as stigmal vein. Hind wing pilose apically, basal third micropilose, costal cell with sparse setae in apical half.

Metasoma: Petiole cylindrical, linear in profile, 1.8× as long as broad, 1.0× as long as hind coxa, rugose-areolate, anterior carina strong, lateral margin rounded, ventral sulcus present with margins narrowly separated. Antecostal sulcus crossed by minute carinae; acrosternite posteriorly rounded; hypopygium apically with one pair of long setae. Ovipositor not exposed.

Male. Length 4.19 – 5.21 mm. Head width 1.2 – 1.3× height; scape yellow, pedicel and anellus pale brown; labrum with 6 digits; flagellum with 8 funiculars, clava 2-segmented, flagellum length 2.1× height, F2 broader than pedicel, anellus minute, difficult to distinguish, F2 2.3 – 2.6× as long as broad. Legs beyond coxa yellow. Petiole 8.3 – 9.3× as long as broad, 2.3 – 2.6× as long as hind coxa. Genitalia with long, thin and broadly separated parameres, median process and broad aedeagus.

Holotype: Brazil: Nova Teutonia, 16.xi.1944, F. Plaumann [1♀, UCRCENT00309915], deposited in BMNH. Paratypes: Brasil: [M...] unreadable label, Wthm. [1♂, NMW: UCRCENT00423314]. Brazil: Rio de Janeiro : Teresopolis, 22°25 ʹ 27”S, 42°58 ʹ 05”W , 10. iii.1966, H. & A. Howden [1♂, UMNH: UCRCENT00476436]. Minas Gerais: S. Caraca, S. Barbara, 20°05 ʹ 50”S, 43°29 ʹ 18”W , i.1970, F.M. Oliveira [1♂, CNC: UCRCENT00426117].

Etymology. Named after Stuart Peck and Jarmila Kukalova-Peck for their outstanding collections and incredible dedication to all that is entomology.