Hylaeus (Deranchylaeus) portokalius, Dathe, 2023

Dathe, Holger H., 2023, New insights into the taxonomy of the Hylaeus xanthostoma complex and further additions to the African Hylaeus fauna (Hymenoptera, Anthophila, Colletidae), Contributions to Entomology 73 (1), pp. 67-93 : 67

publication ID	https://dx.doi.org/10.3897/contrib.entomol.73.e102655
publication LSID	lsid:zoobank.org:pub:77E4C420-0B01-49B8-B634-CAB943BD7397
persistent identifier	https://treatment.plazi.org/id/7209A261-A992-4091-B4C2-7838A2132AFB
taxon LSID	lsid:zoobank.org:act:7209A261-A992-4091-B4C2-7838A2132AFB
treatment provided by	by Pensoft
scientific name	Hylaeus (Deranchylaeus) portokalius
status	sp. nov.

Treatment

Hylaeus (Deranchylaeus) portokalius sp. nov.

Diagnosis.

Species from the species group of Hylaeus curvicarinatus , subgroup 2. The species is intermediate in colouration between H. promontorii and H. venustus , from each of which it differs only in subtle characters, especially in females. However, this study is based on a series collected in parallel, which support a distinction. Except in colour characters, H. portokalius differs from both species by its longer head and finer punctation of the mesosoma. The males are recognisable by their short scapes (ScL:ScW 1.5 vs. 1.8 in H. promontorii ); in the females, the orange colouration is restricted to the lower part of the head; scapes and femora are extensively black.

Description.

Male. N = 10. Total length 4.0-4.4 (4.22) mm, wing length 2.6-2.8 (2.73) mm.

Head trapezoidal (Fig. 7 View Figures 1–9 ); HL:HW 1.02-1.05 (1.03), UFW:LFW 1.67-1.72 (1.69); only very short and sparsely hairy. Scapes short, compact, little expanded, ScL:ScW 1.45-1.61 (1.53); black with large yellow wedge-shaped marking. Flagella very long, yellow, darkened above. Foveae faciales placed very high, very small. Mask bright lemon-yellow, weakly shiny; lateral spots extending above scape bases, truncate; clypeus CL:CW 1.42-1.52 (1.47), BW:DO 0.82-0.98 (0.90); on surface shagreen, scattered punctation barely visible in between sculpture and intense colouration; anterior margin horn brown. Supraclypeal area with raised lateral margins, punctation shining, extended above into a cusp gradually merging into frons. Frons in scape fields grooved, outward and above with strong close punctation, merging into rows of dots; surface shagreen, but shiny. Vertex convex, densely punctate in middle. Sides of face evenly convex, with rounded paraocular margin. Occiput rounded. Genae striate, shiny. Malae distinct, horn-brown. Labrum and mandibles light yellow like mask.

Mesosoma (Fig. 16 View Figures 10–18 ) normal, black, hardly hairy. Yellow spots on calli and tegulae, on pronotum small or absent. Pronotum sides not protruding, bevelled. Mesonotum and scutellum shagreen, dull, with moderate sparse punctation. Mesopleura distinctly more finely and shallowly punctate; omauli rounded. Legs black, with white-yellow colouration on tibiae I anteriorly, II and III basally and apically; basitarsi and other tarsomeres entirely pale. Wing membranes clear, stigma light brown, costa and veins dark brown. Horizontal part of propodeum transversely strongly depressed; medial area with coarse wrinkled meshes, interspaces shiny. Terminal area surrounded by upturned sharp bars, finely sculptured, shiny. Lateral areae also laterally demarcated.

Metasoma (Fig. 25 View Figures 19–27 ) slender and elongate, black. Tergum 1 shagreen, with sparse minute punctation; following terga more finely and shallowly punctate, silky-glossy; depressions scarcely defined. Tergum 1 usually possessing narrow white lateral, often barely visible fringes. Sterna planar, without markings.

Terminalia (Fig. 32 View Figures 28–37 ) very similar to those of H. promontorii , the genital capsules of both species being especially characteristic by their outline elliptical in dorsal view and gonoforcipes with a flat, cup-like shape. Gonoforcipes internally parallel and distinctly longer than penis valves, bearing a graded ring of hairs on free apical sides, instead of a tuft of bristles at tip. Sternum 7 with four large lamellar bristles with hooks distally (Fig. 39 View Figures 38–43 ); lamellae may be broken off and, thus, appear fewer in number in some individuals (Fig. 32 View Figures 28–37 ). Proximal lobe widened distally in spoon-like shape bearing six shorter bristles. Median cone of sternum 8 far outward to distal tip; spiculum elongate and curved.

Female. N = 7. Total length 4.4-5.0 (4.64) mm, wing length 3.0-3.4 (3.16) mm.

Head elongated trapezoidal (Fig. 49 View Figures 46–51 ); HL:HW 1.02-1.09 (1.05). UFW:LFW 1.52-1.58 (1.55), hairless. Scapes long and slender, predominantly black, with yellow longitudinal stripes, proximal segment black; flagella black above, yellow below. Foveae faciales short. Colouration black, clypeus CL:CW 1.11-1.26 (1.19), BW:DO 1.29-1.43 (1.36) partly orange; all distal parts of lower face, such as paraocular areae and genae, as well as malae, labrum and mandibles, orange. Clypeus surface longitudinally wavy-grooved with large shallow punctate pits, silky-glossy. Supraclypeal area densely shallowly punctate; with median furrow, broad above gradually merging into frons. Frons with moderate dense punctation, surface shiny. Vertex convex, with finer, shallower and more scattered punctation, dull. Sides of face evenly convex, with angular paraocular margin. Occiput rounded. Genae bevelled, longitudinally wrinkled and punctate. Malae narrow.

Mesosoma (Fig. 55 View Figures 52–57 ) normal, black, ventrally and laterally with extremely short sparse white pubescence. White markings only on tegulae. Pronotum with sharp anterior edge, sides angularly protruding. Mesonotum, mesopleura and scutellum dull, shagreen, with moderate sparse punctation. Omauli rounded, ventrally angular. Femora black, tibiae and tarsi yellow, often partly blackened. Wing membranes clear, stigma and veins dark brown. Propodeum sharp-edged, medial area sloping, basally with fine, distally coarse sharp-edged meshes, interspaces shiny. Terminal area circular with sharp bar, medial groove broad, smooth, dully sculptured above. Lateral areae sharply bordered posteriorly and laterally, with short white hairs.

Metasoma (Fig. 61 View Figures 58–63 ) spindle-shaped, black. Tergum 1 shagreen, with sparse minute punctation; white lateral fringes narrow. Following terga equally finely sculptured, punctation disappearing. Depressions not well defined. Terminal fringe pale.

Type material.

17 ♂♂, 7 ♀♀. Holotype ♂, ETHIOPIA: Sof Umer, 06°54'N, 40°51'E, 1200 m alt., 30-31.V.2015, J. Halada leg., coll. OLML. - Paratypes 16 ♂♂, 7 ♀♀: ETHIOPIA: 1 ♂, 1 ♀ Sidamo prov., near Bitata, 1480 m alt., 27.IV.2007; 1 ♀ 10 km NW Mega, 04°08'N, 38°16'E, 1670 m alt., 24.V.2015; 1 ♂ Wachile env., 04°32'N, 39°03'E, 1070 m alt., 30-31.V.2015; 3 ♂♂, 5 ♀♀ Sof Umer, 06°54'N, 40°51'E, 1200 m alt., 30-31.V.2015; J. Halada leg. - KENYA: 1 ♂ Tata Hills, Voi nr., 14.IV.2007; 1 ♂ Voi env. (Tsavo), 08-18.XI.1996; 1 ♂ 22.XI.-02.XII.1996; 1 ♂ 23.III.-04.IV.1997; 3 ♂♂ 11.-14.IV.1997; 4 ♂♂ Mwingi, Kangonde wadi, 18.IV.2007, M. & M. Halada leg. - In coll. OLML and SDEI.

Excluded from types: SENEGAL: 10 ♂, Dakar, 18.VII.2004, M. Halada leg. First record for Senegal.

Etymology.

The species belongs to the group of females with an orange mask; πορτοκάλι (modern Greek) - orange (latinised, adjectival).