Dinetus (Dentidinetus) arabicus, 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 : 70-71

Dinetus (Dentidinetus) arabicus sp. nov.

( Figs 31, 32 , 56 )

Diagnosis. Dinetus arabicus sp. nov. is characterized by long erect setae on head and thorax, the outer margin of subdiscoidal cell (cu) vertical, parallel with the nervulus (cu-a), the completely black propodeum, appressed silver setae on scutum, mesopleuron and propodeum (except central part of propodeal enclosure) and fore legs without modifications or teeth. It differs from D. psammophilus by long erect setae on the head; from D. turanicus and D. dentipes by lack of pale lateral parts on the dorsum of propodeum, by unmodified fore trochanter and fore femur and from D. arenarius and D. wojciechi by lack of teeth on the fore trochanter and fore femur and predominantly yellow underside of thorax. D. arabicus sp. nov. male nearly matches in colour the female of D. rakhimovi .

Description male. Dorsal and lateral view: figs 31, 32.

Colour. Head yellow except black vertex and occiput. Prothorax yellow with black spot dorsally. Scutum black with small yellow spot between base of wings and scutellum. Apical and ventral part of mesopleuron yellow, distal part black. Scutellum yellow. Metapleuron black with yellow upper part. Propodeum black. Metasoma brown with broad ivory bands on terga I–III, terga IV–V brown, terga VI–VII yellow. Sterna brown. Fore and middle coxa yellow, of hind coxa black basally, yellow distally. Femora of all legs yellow with ivory parts, dorsally black. Tibiae of all legs yellow with ivory parts, ventrally brown. Tarsi of all legs yellow.

Morphology. Anterior margin of clypeus with two short obtuse-angled teeth. Antenna short and compact, antennomeres 3–5 about 1.5× as long as broad, the following ones (except the last) shorter. Frons and vertex dull, with fine microsculpture. Scutum dull, with dense silver pubescence masking the sculpture. Propodeum with fine microsculpture except dorsal area, partly masking by silver pubescence. Propodeal enclosure dull, reticulated. Fore trochanter and fore femur without tooth. Head, scutum and mesopleuron with long silver pubescence, partly covering the sculpture. Propodeum except dorsal area completely covered with silver pubescence. Clypeus and lower part of frons with very short silver pubescence. Vertex, scutum, mesopleuron and legs with long erect setae, as long as or longer than diameter of front ocellus. Outer vein of subdiscoidal cell (cu) of fore wing vertical, parallel with the nervulus (cu-a) (see fig. 1). Body length 4 mm.

Female unknown.

Holotype ♂. United Arab Emirates — Sajan pr, W of Dhaid, 2.3.2017, N25°17’ E55°51’, 120 m, leg. M.+ B. Halada YT. ( OLML). (Labels see fig. 56).

Etymology. The species is named after its origin Arabia.

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

Figures

FIGURES 27–34. View dorsal and lateral: 27–28 D. jordanicus sp. nov. ♀ paratype, 29–30 D. jordanicus sp. nov. ♂ holotype, 31–32 D. arabicus sp. nov. ♂ holotype, 33–34 D. schmideggeri sp. nov. ♂ holotype. (phot. Luhn) (scale bar 1 mm)

FIGURES 51–56. View dorsal and lateral: 51–52 D. porcellaneus ♂, 53–54 D. vanharteni ♀ holotype, 55 D. pulawskii ♂., 56 holotype labels (phot. Jacobs) (scale bar 1 mm)