Phanerotoma angusticrus, Achterberg, 2021

Achterberg, Cornelis van, 2021, The tribe Phanerotomini (Hymenoptera, Braconidae, Cheloninae) of the Arabian Peninsula, with special reference to the United Arab Emirates and Yemen, ZooKeys 1014, pp. 1-118 : 1

Phanerotoma angusticrus sp. nov. Figs 1 , 2-12

Type material.

Holotype, ♀ (RMNH), " United Arab Emirates, al-Ajban (6418), Malaise & light tr[ap], 7-28.xii.2006, 24°36'N, 55°01'E, A. v. Harten, RMNH’07”. Paratypes: 1♀: " Yemen: Al Kowd (8136), ix.2003, light trap, A. v. Harten & S. Al Haruri, RMNH’03”; 1♀: Idem, v.-vi.2000; 1♀, "Yemen: Al Kadan (6699), iv.2002, light trap; A. v. Harten & T. Abdul-Haq, RMNH’03”; 1 ♀: "Yemen (5404), near Hamman’Ali, from coffee-berries (with Ceratitis capitata ?), 14.viii.2001, A. v. Harten, RMNH’02”.

Diagnosis.

Apical half of antenna of ♀ cylindrical in lateral view, not widened and subapical segments short, six segments moniliform or submoniliform (Fig. 12 ); vertex with satin sheen; hind femur and tibia of ♀ slender, hind femur 4.4-4.5 × longer than wide; temple in lateral view hardly widened dorsally and with satin sheen (Fig. 10 ); frons without median carina; face nearly entirely densely sculptured and shiny; head hardly emarginate posteriorly (Fig. 8 ); vein 2-SR of fore wing nearly straight (Fig. 2 ); vein cu-a of fore wing 1.0-1.3 × vein 1-CU1; Fig. 2 ); blister of middle tibia hardly developed; hypopygium of ♀ usually dark brown (Fig. 5 ); third tergite 1.7-1.9 × as long as second tergite, curved laterally, densely sculptured, rather dull and convex. Easily confused with P. leucobasis , but differs because of the narrow hind femur and tibia (Fig. 6 ), the less emarginate head, the flattened and longer third metasomal tergite, the somewhat wider clypeus and the less sculptured temple.

Description.

Female, holotype, length of body (excluding ovipositor and hypopygium) 3.8 mm; antenna 2.9 mm; fore wing 3.0 mm; visible and setose part of ovipositor sheath 0.2 mm.

Head. Width 1.5 × median length in anterior view, hardly emarginate posteriorly in dorsal view and part of head above eye in lateral view 0.3 × height of eye (Figs 8 , 10 ); antenna with 23 segments, with apical spine and approx. as long as fore wing, segments slender and gradually shortened, segments of apical half without minute subapical protuberances and cylindrical, six apical segments moniliform and narrowed basally (Figs 11 , 12 ), third, fourth and penultimate segments 2.8, 2.6 and 1.3 × longer than wide in lateral view, respectively; area of stemmaticum superficially rugulose; OOL: diameter of posterior ocellus: POL = 16: 6: 4; length of eye 2.4 × temple in dorsal view (Fig. 8 ); frons micro-sculptured and shiny anteriorly, without distinct median carina and rugose laterally (Fig. 8 ); vertex finely transversely rugose and with satin sheen; temple granulate near eye and with fine longitudinal rugulae posteriorly, rather convex and with satin sheen; clypeus 0.9 × as wide as minimum width of face (intertentorial distance 3.8 × minimum distance between clypeus and eye ventrally), rather flat ventrally, with long erect setae, smooth and shiny (Fig. 9 ); face rather shiny and distinctly transversely rugulose, without median carina dorsally; clypeus with three obsolescent teeth medio-ventrally (Fig. 7 ); eye large, strongly convex and in lateral view 2.1 × temple (measured medially) and hardly widened dorsally (Fig. 10 ), in anterior view its height 0.8 × minimum width of face; upper condyle of mandible near lower level of eyes (Fig. 9 ); malar space coriaceous-rugulose and 0.5 × as basal width of mandible; lower tooth of mandible small and 0.4 × as long as apical tooth (Fig. 7 ).

Mesosoma (Figs 1 , 3 ). Length 1.4 × its width in lateral view; side of pronotum coarsely rugose and shiny; mesosternum superficially granulate and shiny; mesoscutum largely granulate-coriaceous, but medio-posteriorly distinctly rugose and with satin sheen; scutellar sulcus wide, with nine carinae (Fig. 3 ); scutellum widely triangular, densely finely granulate-rugulose (nearly up to posterior margin), slightly convex and with satin sheen; metanotum with nearly complete median carina and medio-posteriorly with minute tooth; propodeum coarsely reticulate-rugose, without distinct median and transverse carinae and latero-posteriorly not tuberculate. Wings. Fore wing 2.6 × longer than its maximum width; length of 1-R1 1.1 × as long as pterostigma; r issued rather far beyond middle of pterostigma and 0.4 × 3-SR; distance between 1-R1 and wing apex 0.5 × 1-R1; 2-SR slightly curved and distally converging to posterior margin of pterostigma (Fig. 2 ); SR1 curved; 2-SR+M present, because of narrowly postfurcal m-cu; parastigma large; 1-CU1 0.3 × as long as vein 2-CU1, cu-a strongly inclivous and 1.2 × as long as 1-CU1; r:3-SR:SR1 = 5:13:42; 2-SR:3-SR:r-m = 18:13:7; r-m reclivous; 2-M weakly curved (Fig. 2 ). Hind wing: M+CU:1-M:1r-m = 22:14:10. Legs. Hind femur narrow (especially apically) and 4.4 × as long as wide (Fig. 6 ); hind tibia rather narrow; middle tibia with small ivory blister; inner spur of middle tibia 0.5 × its basitarsus; hind coxa mostly smooth, but partly superficially granulate and shiny; hind basitarsus and tarsal claws slender (Fig. 6 ).

Metasoma (Figs 4 , 5 ). Elliptical in dorsal view, twice as long as wide and 1.3 × as long as mesosoma; first and second tergites finely and densely longitudinally rugose; second suture narrow; third tergite 1.7 × longer than second tergite and laterally weakly curved, in lateral view slightly convex posteriorly, in dorsal view convex medially, densely and finely rugulose and medio-posteriorly truncate (Fig. 4 ), lateral lamella narrow, not protruding latero-apically and medio-apically truncate and wide; ovipositor sheath narrow and parallel-sided (Fig. 5 ), its visible part 0.07 × as long as fore wing and 0.12 × metasomal carapace and with some long and erect setae; hypopygium apically robust, no spine, but with short up curved and setose triangle (Fig. 5 ).

Colour. Yellowish brown; palpi, mandible (except dark brown teeth), tegulae, mesoscutum medially, legs (but hind femur ventrally, and hind tibia apically and subbasally brownish), first and second metasomal tergites and basal half of metasoma ventrally largely pale yellow or ivory; clypeus, malar space and parastigma pale yellowish; apical third of antenna, ovipositor sheath and pterostigma (but basally pale yellowish) largely brown; stemmaticum dark brown; wing membrane subhyaline but below dark part of pterostigma and near vein CU1 slightly infuscate; vein 1-M largely pale brown; veins 1- & 2-CU1, r and 3-SR of fore wing brown.

Male.

Unknown.

Variations.

Length of fore wing 2.6-3.1 mm; third tergite 1.7-1.9 × longer than second tergite; vein cu-a of fore wing 1.0-1.3 × as long as vein 1-CU1.

Biology.

Unknown.

Distribution.

United Arab Emirates, Yemen.

Etymology.

The name is a combination of angustus (Latin for narrow) and crus (Latin for leg), because of the slender hind femur and tibia.

Figures

Figure 1. Phanerotoma angusticrus van Achterberg sp. nov., ♀, holotype, habitus lateral.

Figures 2 - 12. Phanerotoma angusticrus van Achterberg, sp. nov., ♀, holotype 2 wings 3 mesosoma dorsal 4 first-third metasomal tergites dorsal 5 metasoma lateral 6 hind leg lateral 7 mandible ventral 8 head dorsal 9 head anterior 10 head lateral 11 antenna lateral 12 apical third of antenna lateral.