Duwalia perula, 2018

DUWALIA PERULA SANTOS , SP. NOV.

( FIG. 7)

Diagnosis See diagnosis for Duwalia gen. nov.

Description of female holotype Fore wing 5.1 mm long. Body moderately slender and shiny.

Head: Mandible, clypeus and supra-clypeal area covered with moderately dense, long hairs; MLW 1.8, MWW 0.6; ventral tooth, as robust as dorsal one, its tip lanceolate; MSM 0.8. Clypeus sparsely punctate; CHW 1.8, CWW 1.8, apex narrower than midlength. Supra-clypeal area coriarious-colliculate. Antenna with 26 flagellomeres; maximum width of flagellum about 2.2 × the minimum width of f1; flagellum blunt, not gradually tapered towards apex. Supra-antennal area ventrally slightly concave, smooth, dorsally colliculate, medially with suture-like longitudinal line occelar area distinctly convex. Occipital carina almost complete, absent only on short median section of occiput, ventrally joining hypostomal carina at mandible base.

Mesosoma: Pronotum longitudinally striate along posterior margin and median transverse sulcus,dorsally coriarious. Mesoscutum coriarious, shiny, with short transverse wrinkles along notaulus. Scuto-scutellar groove distinctly striate. Mesopleuron sparsely pilose, mostly coriarious, dorsal corner longitudinally striate. Subalar ridge narrow, weakly projected, keeled. Mesopleural fovea distinct as a small pit, far from mesepimeron. Propodeum 1.5 × as long as wide, mostly transversely striate, anterolaterally coriarious, after posterior transverse carina longitudinally striate. Lateral longitudinal carina present as blunt ridge between anterior transverse carinae. Tibiae and tarsi with sparse, small bristles. Fore wing vein 1-Rs+M sinuous, continuous with cross-vein 1m-cu, cross-vein 1m-cu uniformly curved; cross-vein 1cu-a arising slightly distad to base of 1M+Rs; vein 2Cua 2.00 × as long as cross-vein 2cu-a, veins angled at about 130°; APH 1.1; AWH 1.6; HW1C 1.8.

Metasoma: T1 mostly coriarious, at midlength with faint longitudinal striae; T1LW 1.6, T1WW 3.35. T2LW 0.60, T2 coriarious, moderately pilose, T2WW 1.4. OST 0.35; ovipositor dorsal valve with four ridge-like teeth; ventral valve subapically with a distinct swelling, without distinct apical teeth.

Colour: Dark ferruginous (176,112,025). Head black; mandible light ferruginous, apically blackish; clypeus basally black, lighter towards apex, clypeal margin ferruginous. Scape whitish; pedicel dorsally whitish, ventrally blackish; flagellum basally brownish, apically black, f5–7 and part of f8 whitish. Mesosoma and metasoma dark ferruginous; legs fuscous towards apex; metasoma lighter towards posterior apex, T8, ovipositor and sheath light ferruginous. Wings slightly infuscate towards apex.

Male ( Fig. 7C) Similar to the female except by the following. Fore wing 4.2 mm long; body generally shinier, less pilose and smoother, all sculpturing less pronounced than in female. Triangular lobes on clypeal margin almost indistinct; antenna with 25 flagellomeres, without whitish band; hind tibia more distinctly darker than remainder of legs, uniformly brown; median longitudinal carina of propodeum indistinct, its position marked by a distinct groove instead of carina.

Variation Paratype female essentially identical to holotype, except slightly smaller, fore wing 4.6 mm long; lateral longitudinal carina of propodeum weaker.

Etymology ‘Perula’ is a Medieval Latin form for ‘pearl’, apparently derived from ‘pernula’, diminutive of ‘perna’ (the brown mussel); in reference to the type locality, Pearl Beach, in Australia. The name is to be treated as a noun in apposition.

Material examined 2 ♀♀ 1 ♂. Holotype ♀: AU S T R A L I A, N e w S o u t h Wa l e s, Pe a r l B e a ch, Crommelin Biological Field Station, 33.5511°S, 151.2978°E, sweeping, May 2009, A. Austin (WINC). Condition of type: mounted on triangular point; apical flagellomere of right antenna missing; right hind leg removed for sequencing and glued to separate triangle point; otherwise intact. Paratypes: 1 ♀ 1 ♂, same data as holotype, mounted in triangle point. Paratype female previously used for whole body extraction [‘Extraction Nb. / GS-Cry-378: / whole wasp extracted 2013/14’ // ‘ Ichneumonidae / Ateleute / det S. Klopfstein 2014’] – Genbank accession number (as Ateleute sp. ) KY447113 View Materials . Both fore legs apicad of coxa detached and glued to the triangle point; right antenna apicad of scape, left mid leg and right ovipositor sheath missing.

Distribution Australia.