Dinetus (Venustidinetus) deserticus, Jacobs, 2021

Jacobs, Hans-Joachim, 2021, A review of Dinetus Panzer, 1806 with descriptions of five new species and keys to world species (Hymenoptera, Crabronidae), Zootaxa 5061 (1), pp. 69-94 : 73

Dinetus (Venustidinetus) deserticus sp. nov.

(Figs 12, 41, 42, 56)

Diagnosis. Dinetus deserticus is characterized by the absence of long erect setae on head and thorax, by predominantly ochraceous body colour, smooth and shiny scutum with strongly reduced punctures and vertical outer vein of subdiscoidal cell (cu). D. deserticus differs from D. pictus and D. simplicipes by its smooth and shiny scutum with strongly reduced puncture and the rounded apical margin of clypeus; from D. tunisiensis , D. porcellaneus , D. jordanicus and D. cereolus by its ochraceous body colour and structure of propodeal enclosure (fig. 15 vs 12); from D. nabataeus und D. politus by strongly reduced black colour on vertex and propodeum (fig 41 vs 39) and from D. pulawskii by lack of appressed silver pubescence on propodeum.

Description female. Dorsal and lateral view: figs 41, 42.

Colour. Head yellowish-brown, mandibular apex and vertex in the area of hind ocelli black. Scape, antennomere 2 and base of 3 yellowish-brown, the remaining antennomeres dark brown. Pronotum yellowish-brown with ivory transverse stripes proximally and distally. Scutum brown with black posterior margin. Scutellum and metanotum ivory. Mesopleuron, metapleuron and propodeum yellowish-brown. Metasoma yellowish-brown, tergum II with small ivory spots on the distal margin. Legs yellowish-brown, mid and hind coxae, trochanters and femora with black stripe on the upper side.

Morphology. Antennomere 3 about 4.5× as long as broad. Distal antennomere distinctly curved.Anterior margin of clypeus rounded, without teeth. Face and frons without tomentum. Scutum shiny, with very fine microsculpture of longitudinal ridges, stronger in the apical part before the scutellum. Mesopleuron and lateral parts of propodeum smooth and shiny, without visible microsculpture. Propodeal enclosure finely reticulated, without distinct oblique striae (fig. 12). Upper anterior part of mesopleuron, outside of hind coxa and tergum II below the pale markings with tufts of dense appressed silver pubescence. Metasoma with very fine microsculpture, without any special markings. Coxa, trochanter, femur and tibia of fore legs with long white setae. Fore tarsal rake with six long spines, distinctly longer than the diameter of the tarsomere. Outer vein of subdiscoidal cell (cu) vertical, parallel with the nervulus (cu-a) (see fig. 1). Body length 5 mm.

Male unknown.

Holotype ♀. United Arab Emirates, Wadi Shawka, 27,13 N 56,02 E, leg V. Harten (coll. CSE), 14.05.2009 uae3. Second label: Dinetus nabateus [sic] de Beaumont 1960 ♂, det. Schmid-Egger 2011. ( ZSM, temporary in coll. CSE). (Labels see fig. 56).

Etymology. The species is named after its habitat, the desert.

Distribution. Only the holotype from United Arab Emirates is known.