Dolichurus pseudobimaculatus Gadallah 2024, sp. nov.
Creators: name: Gadallah, Neveen S.
name: Abu El-Ghiet, Usama M.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ampulicidae
Dolichurus
Dolichurus pseudobimaculatus

description: Dolichurus pseudobimaculatus Gadallah, sp. nov.
Figs 5 (A–F), 6(A–E)
Type material: SAUDI ARABIA. Holotype (♂), Fayfa (Jazan Province) [17º16'07"N, 43º07'32"E], vii.2023, Malaise trap on Mangifera indica, Usama M. Abu El-Ghiet collector.
Description of male holotype: body length: 4.5 mm
Colouration (Fig. 5A–D). Shiny black, with antenna, mandible (except tip of teeth black), and most of legs (tip of femora, tibiae and tarsi) red; tegula ferruginous with white marking; frontal platform apex white medially, surrounded with yellow; middle part of clypeus with two large whitish markings; pronotal tubercle whitish; T 4–6 and S 4–6 brownish; S 2 thinly yellow at apex. Wings hyaline, with colored reflections, veins dark brown to black.
Head (Figs 5C–E, 6A). Wider than long in frontal view (1.25×); with dense fine whitish setae along eye orbit and lower face; eyes reniform, inner orbits parallel; frons shiny, coarsely rugose; vertex shiny, sparsely finely punctate; posterior margin of head sparsely punctate; ocelli arranged in equilateral triangle; scape with sharp longitudinal carina; flagellomeres distinctly longer than wide, F2 = F3; preapical bulged externally; clypeus longitudinaly carinate medially, deeply emarginate at apex, with sharp, short tooth on each side, with fine whitish setae, denser laterally, but not hiding fine punctures beneath; labrum short, semirounded; mandible bifid, inner shorter tooth blunt at tip, with a longitudinal carina along its length, with inner subbasal protrution.
Thorax (Fig. 5E, F, 6A). Pronotal collar shiny, sharply angled antero-laterally, straight posteriorly, with some irregular transverse rugae antero-medially, pronotal tubercle in form of transverse oval slits postero-laterally; mesoscutum 2.0× as long as pronotal collar, densely finely punctate; scutellum densely punctate, punctures somewhat confluent; metanotum thin, strigate; propodeum regularly areolate dorsally, densely rugose posteriorly; mesopleuron with obsolete oblique ridges, sparsely punctate between ridges, with short, hardly visible sharp tooth posteriorly; metapleuron obliquely ridged. Wings and legs usual.
Gaster (Fig. 6B–E). First tergum with fine, somewhat sparse punctures, T 2 & T 3 with dense, coarser punctures; T 4–6 nearly smooth to superficially punctate; S 2 humped medially, densely punctate; S 3 densely punctate, S 4 transversely rectangular, wider than long, angulate postero-laterally; S 6 narrow, longer than wide. Male genitalia with distinctly short, laterally bulged aedeagus, meeting in a midline; parameres broad at base, gradually narrowed, being tapered at tip, connected with each other by an inverted V-shaped membranous area.
Female: Unknown.
Etymology: The name “ pseudobimaculatus ” refers to the similarity of the new species to D. bimaculatus.
Distribution: So far Saudi Arabia (Fayfa, Jazan).
Comments. This is the second record of the genus Dolichurus for Saudi Arabia. The first species, D. arabicus Ohl, was recorded by Soliman et al. (2017). Based on Arnold (1928: 196), our male specimen is similar to the male of D. bimaculatus, but differs in the following: posterolateral pronotal tubercle whitish, transverse oval (Fig. 5E) (in male of D. bimaculatus, pronotal tubercle subconical, white and truncate at apex, obliquely directed outwards and backwards, see Arnold, 1928: 195, fig. 3); mesoscutum and scutellum densely, deeply punctate, punctures more or less confluent on scutellum (Fig. 5E) (in male of D. bimaculatus, mesoscutum and scutellum sparsely punctate); mesopleuron shiny, with hardly seen oblique ridges, punctate between ridges (Fig. 6A); metapleuron incompletely obliquely ridged, shiny (Fig. 6A) (in male of D. bimaculatus, both are dull, obliquely and closely ridged); propodeum dorsally regularly, widely areolate, densely rugose posteriorly (Fig. 5F) (in male of D. bimaculatus, see Arnold, 1928: 195, fig. 3b); T 1–3 and S 1–3 shiny, T 1 with sparse fine punctures, T 2 & T 3 densely, closely punctate (Fig. 6B) (in male of D. punctatus, T 1–3 and S 1–3 dull, all closely punctate); F2 = F3 (Fig. 5E) (in male of D. bimaculatus, F2 slightly longer than F3); mesoscutum 2.0× as long as pronotal collar (Fig. 5E) (in male of D. bimaculatus, mesoscutum 2.5× as long as pronotal collar).
description: Published as part of Gadallah, Neveen S. & Abu El-Ghiet, Usama M., 2024, Sphecidae sensu lato (Hymenoptera: Apoidea) of the Jazan Province, south-west of Saudi Arabia, with the description of two new species, pp. 71-95 in Zootaxa 5492 (1) on page 76, DOI: 10.11646/zootaxa.5492.1.4, http://zenodo.org/record/13212094