Mirnapis ohloweni Packer and Dumesh

Packer, Laurence & Dumesh, Sheila, 2012, Mirnapis ohloweni Packer and Dumesh, new species with notes on M. inca Urban (Hymenoptera: Apidae: Eucerini), Zootaxa 3478, pp. 113-122 : 117-119

Mirnapis ohloweni Packer and Dumesh , new species

(Figs. 1A and D; 2A, B, E and F; 3A and C)

Diagnosis: This species is most easily distinguished from M. inca by the following: female with metatibial and metabasitarsal scopa orange ( Fig. 2A ); male with dark metasomal hairs extensive, extending for apical half of T2 medially ( Figs. 2 E and F); basal areas of T2–T4 with white, plumose, appressed hairs absent or reduced to fringe of short hairs on gradulus ( Fig. 2 F); T1–T5 with apical translucent areas short, approximately 0.5MOD (range 0.3 – 0.6MOD) ( Fig. 2 F).

Description: Female: Dimensions: Body length: 13.0–14.0 mm; forewing length: 8.5–8.7 mm; head width: 4.3–4.5 mm; intertegular span: 3.5–3.7 mm.

Colouration: Integument black except as follows: F3–F10 dark brown anteriorly; apex of metatibia and all tarsomeres 1–4 marked with dark red-brown, pretarsi entirely red-brown; tegula amber posteriorly, dark brown anteriorly; apical impressed areas of terga with extremely narrow, slightly translucent apical rim (<0.25MOD) ( Fig. 2B ); pre-gradular area of S2 orange, darkened apically; apex of apical impressed areas of sterna narrowly amber then orange-brown anteriorly.

Pubescence: Apical fringe of labrum pale, hairs plumose, <2MOD; median tuft orange-brown, ~1.5MOD. Clypeal hairs pale, weakly plumose or simple, <1MOD; rest of face, vertex, mesoscutum and scutellum with strongly plumose, yellowish-brown hairs (ferruginous in fresh specimen) <2.5MOD; pleura, side of propodeum and forefemur with paler, longer hairs, <4MOD. Metatibial and metabasitarsal scopa yellow-orange, hairs long (<4MOD) with numerous long branches (~0.5MOD) ( Fig. 2A ). T1 hairs pale yellowish-orange, erect, long (<3.5MOD), shorter blackish hairs on sides and subapically ( Fig. 2A and 2B ). T2-T6 with black, subappressed, simple, short hairs (<1MOD), with few longer (<2MOD). T5 with dense, suberect black hairs (<1.5MOD). T6 with shorter blackish hairs. T2 with minute and T4 with large sublateral patch of appressed plumose white hairs (those on T2 sometimes hidden beneath T1) ( Fig. 2A ); T5 with plumose, pale, long (2MOD) hairs laterally continuous with sublateral patch similar to that on T4 ( Fig. 2A ).

Sculpture: Clypeus weakly imbricate, punctures large, i<d, except small and crowded on brow of apical rim. Lower paraocular area weakly imbricate, shiny, punctures shallow, dense. Upper paraocular area and region between lateral ocellus and compound eye shiny, punctures minute and sparse. Vertex densely punctate, punctures small. Mesoscutum coarsely imbricate, dull; punctures shallow, sparse, i=1–2d. Scutellum less strongly imbricate, punctures dense, more distinct than those of mesoscutum, i~d. Metanotum dull, punctures shallow, crowded medially, sparse laterally. Metapostnotum punctate-areolate, with distinct medial line. Metasomal terga very weakly imbricate (T1, T4–T6) to shiny (T2–T3), punctures small, distinct, irregularly spaced, i=1–3d.

Structure: Labrum approximately twice as wide as long, deeply and triangularly excised apicomedially, excision extending basad for almost 1/2 length of labrum, lobes on either side of excision approximately right angular (Fig. 1D). Postpalpal part of galea 1.05–1.1X as long as compound eye. Maxillary palpomeres 5. Mouthparts entirely devoid of hooked or otherwise modified hairs. Malar space subequal to minimum diameter of F1, approximately 1/3 as long as basal depth of mandible. Clypeus more than twice as wide as long, L:W 32:66; lateral clypeal carina strong; minimum clypeocular distance subequal to length of malar space. Inner margins of compound eyes subparallel. Small, sharp tubercle posterolaterad of lateral ocellus. Vertex somewhat raised, distance between posterior tangent of median ocellus and top of head in frontal view slightly less than MOD (13:15); region between lateral ocellus and compound eye weakly depressed. Scutellum <1/3 as long as mesoscutum, 35:105. Metanotum mostly declivitous. 2nd submarginal cell short, anterior margin less than width (Fig. 1F). Translucent apices of T2–T4 narrow, on T2 <0.6MOD.

Male: As in female except as follows:

Dimensions: Body length: 11.7–12.5mm; forewing length: 9.0– 9.5mm; head width: 4.0– 4.4mm; intertegular span: 3.0– 3.5mm.

Colouration: Entire flagellum red-brown on anterior surface; labrum yellow, edged with dusky brown (Fig. 1A); clypeus yellow; apical impressed areas of terga with narrow, somewhat translucent apical rim (~0.6MOD) ( Fig. 2 F).

Pubescence: Labrum and clypeus with hairs dense, plumose, long ~2.5MOD; rest of face, thorax and T1 with longer hairs, <4.5MOD. T2 with pale, somewhat plumose, suberect, long (<2.5MOD) hairs laterally and basally, elsewhere hairs black, simple and shorter (<2MOD). T2 and T3 without sparse, strongly plumose, short hairs or with these restricted to gradular fringe laterally and absent medially; sparse, suberect pale, long hairs (<2.5MOD) laterally; suberect, simple, black hairs elsewhere, (<2.5MOD) ( Fig. 2 F). T4 and T5 with erect, pale, long (<3MOD) hairs anterolaterally with large patches of white, appressed, strongly plumose hairs sublaterally; elsewhere hairs simple, suberect <2MOD ( Fig. 2 E). T6 apical fringe, dark brown medially, <1MOD with small posterolateral patch of pale hairs, white laterally, pale brown sublaterally (<3MOD). T7 with black-brown hairs, <1.5MOD. S2–S4 with subapical hair fringes of plumose, whitish hairs, <3MOD laterally, sparser and shorter medially, more distinctly divided into lateral patches on S4. S5 with subapical fringe of brown, plumose hairs, <2MOD laterally, 1MOD medially; slightly longer, black, simple hairs anterior to subapical fringe. S6 apicomedian depression margined with dark hairs (~1MOD).

Sculpture: Clypeus more sparsely punctate, i>d; metasomal terga sparsely punctate, especially on apical 1/3, i=2–5d, apical translucent areas largely impunctate.

Structure: Labrum approximately 2/3 as long as wide, length (to apex of lobe): width 32:51; deeply and triangularly excised apicomedially, excision extending basad for>1/6 length of labrum (6:32), emargination and lobes on either side approximately right angular (Fig. 1A). Malar space longer than clypeocular distance (7:5). F1 with minimum length subequal to minimum diameter; minimum length 1/6 length of F2, maximum length 1/4 that of F2. Tubercle laterad of lateral ocellus larger. Pygidial plate narrowed, apex <0.7MOD. S6 with lamellate posteriorly convergent carinae, separated apically by <1MOD. Genitalia as in figures 3A and 3C.

Material examined: Holotype female, 6 male paratypes: PERU, Ica Departamento, 51.1km E. Nazca, 14°48.623’S 074°39.958’W, 2775m, 3.v.2011, leg. Ohl, Krause and Breitkreuz (holotype and one paratype male MUSM; other paratypes MNHN and PCYU); Additional paratypes: one female, one male: Ica Departamento, 41km E Nazca, 14°50.254’S 074°43.322’W, 2310m, 2.v.2011, leg. Ohl, Krause and Breitkreuz ( PCYU); one female: Ayacucho Departamento, 55km E. of Nazca, -14.791 -74.647, 2730m, 3.iv. 2010, L. Packer and J. Rivera, Tarasa operculata (Cav.) Krapov. Malvaceae ) ( PCYU).

Etymology: The species is named in honour of Michael Ohl and Robin Owen. The former caught both sexes of the new species and the latter caught the first specimen of M. inca in Chile and the efforts of both were necessary to permit the descriptions and redescriptions presented here.

Variation: The male and female from 41km East of Nazca have more densely punctate metasomal terga than all but one male of the other specimens examined.

Comments: Tarasa is not the pollen source collected by the females in the series noted above as the pollen in the scopae of the females is of a different colour – being orange rather than brown.

Figures

FIGURE 2. A, B, E, F Mirnapis ohloweni Packer & Dumesh, new species. C, D, G, H. M. inca. A and C, female habitus lateral view; B and D, female T 1 – T 3, dorsal view; E and G, male habitus, lateral view; F and H, male T 1 – T 3, dorsal view.