Hylaeus (Deranchylaeus) diastictus, 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/FC24FF15-B4FA-4212-82AB-5B6922549A22
taxon LSID	lsid:zoobank.org:act:FC24FF15-B4FA-4212-82AB-5B6922549A22
treatment provided by	by Pensoft
scientific name	Hylaeus (Deranchylaeus) diastictus
status	sp. nov.

Treatment

Hylaeus (Deranchylaeus) diastictus sp. nov.

Diagnosis.

Unlike most other species of the subgroup, the mesonotum is densely and finely punctate. The short, compact genital capsule with the separated, short-spatulate ends of the gonoforcipes has some resemblance to Hylaeus tenuis , whose mesosoma, however, is much more strongly punctate.

Description.

Male. N = 1. Total length 4.20 mm, wing length 2.9 mm.

Head (Fig. 9 View Figures 1–9 ) long trapezoidal (HL:HW 1.05, UFW:LFW 1.68); hairy on posterior side only. Scape very slender, short (ScL:ScW 1.95), narrower than flagella; black, lightened apically. Flagella normal, segments about 1.5 times longer than their diameter, offset like a saw; yellow, slightly darker above. Foveae faciales minute. Mask complete, white: lateral spots reaching slightly above scape bases, rounded to orbits. Clypeus (CL:CW 1.40, CB:CO 1.00) surface finely reticulate shagreen with sparse shallow punctate pits, silky-shiny; anterior margin horn-brown. Supraclypeal area half white, strongly narrowed above, apex with raised lateral edge, gradually merging into frons. Scape fields shagreen, frons otherwise strongly subcontiguously wrinkly-punctate, lateral dots coarser, surface shiny. Vertex highly convex, merging posteriorly into wrinkles. Sides of face convex, not depressed, with rounded paraocular margin. Genae narrow, longitudinally wrinkled and furrowed, punctate. Malae narrow, but distinct. Occiput rounded. Labrum and mandibles white.

Mesosoma (Fig. 18 View Figures 10–18 ) normal, black, only below with sparse short white pubescence. Only tegulae with white spots; pronotum and calli black. Pronotum very short, with sharp upper edges, laterally rounded. Mesonotum, scutellum and mesopleura dull shagreen with fine close punctation. Omauli rounded. Legs black; tibiae I anteriorly, II and III basally broadly and apically less strongly white margined; basitarsi and other tarsomeres entirely white. Wing membranes clear; stigma, costa and veins light brown. Basal part of propodeum long, distally with sharp transverse edge. Basal area with coarse wrinkled meshes, interspaces shiny. Basal, lateral and terminal areae separated from each other by upturned sharp ridges. Median furrow of terminal area narrow.

Metasoma (Fig. 27 View Figures 19–27 ) slender and elongate, black. Tergum 1 shagreen, with fine dense punctation, finer than on mesonotum; without lateral fringes. Following terga more finely and shallowly punctate, silky. Depressions not demarcated, pale. Sterna flat. Terminalia Fig. 36 View Figures 28–37 . Lobes of sternum 7 with only one larger bristle/lamella, lobes almost parallel, distal lobe long, with setae without bristles; proximal lobe spoon-like. Sternum 8 distally blunt; basally with spiculum somewhat elongated. Genital capsule short and compact, gonoforcipes apically short and blunt, with few long bristles. Penis valves viewed as a pair broad, as long as gonoforcipes.

Type material.

Holotype ♂ (single specimen), ETHIOPIA: Sidamo prov., ca. 50 km NE Mega, 1420 m alt., 24.IV.2007, J. Halada leg.; coll. OLML.

Etymology.

Named after the comparatively fine punctation; διαστικτος (Greek) - finely dotted, speckled (adjectival).