Gasteruption jenningsi Ramage & Jouault 2020, sp. nov.

Gasteruption jenningsi sp. nov.

urn:lsid:zoobank.org:act: 44449614-FB69-4EFB-BD5B-154829669D83

Figs 7–8, 12C

Diagnosis

Mainly black species, large sub-basal ring on hind tibia and large sub-apical ring on ovipositor white. Head somewhat elongate, 1.13 × as long as wide; scape 1.77 × as long as pedicel; F-I 1.30 × as long as scape, F-II 0.90 × as long as F-I. Hind coxa punctulate, 3.67 × as long as wide. Fore wing with first discal cell absent.

Etymology

The specific epithet is a patronym honoring Dr John Jennings (University of Adelaide), who greatly contributes to the knowledge of Hymenoptera, including those of New Caledonia, and is to be treated as a noun in the genitive case.

Type material

Holotype

NEW CALEDONIA • ♀; Grande Terre, Province Sud, Yaté, Ouinné; 21°59′56.61″ S, 166°37′30.82″ E; alt. 190 m; 15 Nov.–2 Dec. 2016; E. Poirier leg.; Malaise trap n°OUI-MAL2; right antenna and right mid femur to TS 5 missing; MNHN.

Description

Female holotype

MEASUREMENTS (in mm except CI, EI and OI). BL = 10.60; HL = 1.43; HW = 1.27; EL = 1.05; EW = 0.63; OOL = 0.17; POL = 0.13; SL = 0.23; PDL = 0.13; F-I = 0.30; F-II = 0.27; FWL = 4.95; HWL = 2.75; MSL = 2.40; MSW = 1.1; MTL = 7.40; OL = 11.20; CI = 89; EI = 60; OI = 226.

COLOR. Mainly black species; coxa I and tibia III dark brown; femur I brown; fore leg trochanter, base and apex of femur, inner face of tibia, TS 4–5, mid leg inner face of tibia, ovipositor orange-brown; mandible (except for apex) and mouthparts yellowish; fore leg base, outer face and apex of tibia, TS 1–3, mid leg base and apex of tibia, TS 1 (except for apex), large sub-basal ring on hind leg tibia, apex of sheath, large sub-apical ring on ovipositor white. Fore and hind wing with membrane hyaline and black veins.

HEAD (Fig. 8 A–C). In full-face view, 1.13 × as long as wide, frontal carina very shallow, vertex strongly convex; mandibles bidentate; clypeus strongly sinuate; malar space */5 th the width of the pedicel; antenna 14-segmented, scape about 1.90 × as long as wide, 1.77 × as long as pedicel; F-I 1.30 × as long as scape, F-II 0.90 × as long as F-I; flagellomeres III–XI shortening gradually toward apex; apical flagellomere slightly longer than preceding one; vertex with ocelli arranged in isosceles triangle, mid-ocellus separated from lateral ocelli by */5 th its diameter, lateral ocelli separated by slightly less than their diameter and by 1.73 × their diameter from eye margin; occipital carina narrow.

MESOSOMA (Figs 7, 8A, C). Propleuron as long as pronotum; pronotum with strong latero-anterior tooth; mesoscutum in lateral view rounded anterodorsally, notauli conspicuous, crenulate and somewhat U-shaped, parapsidal lines distinct; mesopleural groove broad; propodeum in lateral view shallowly convex; hind coxa elongate, 3.67 × as long as wide; hind trochanter with groove present; prefemur small, ¼ th of length of trochanter; hind femur 0.68 × as long as hind tibia; TS 1 3.00 × as long as TS 2; TS 2 1.38 × as long as TS 3; TS 3 2.17 × as long as TS 4; TS 4 0.46 × as long as TS 5; hind tarsal claw 0.38 × as long as TS 5; tarsal claw simple.

FORE WING (Fig. 8E). First discal cell absent; vein 2-M tubular along all its length, thicker on its basal third.

HIND WING (Figs 7, 8A). With 3 equidistant hamuli, venation reduced with only R+Rs present.

METASOMA (Figs 7, 8A). Elongate, 3.08 × as long as mesosoma.

SCULPTURE. Head, mesosoma (except for posterior median spot on mesoscutum, oblique stripe on pronotum, ventral part of mesopleuron, mesopleural groove, metapleuron, propodeum), legs and metasoma punctulate. Oblique stripe on pronotum and ventral part of mesopleuron rugulose. Posterior median spot on mesoscutum, mesopleural groove and metapleuron rugose. Propodeum areolate-rugose. Lateral-posterior face of coxa II–III with shallow transverse ridges.

PILOSITY. White, minute, oblique and very dense on all body, longer on mandibules, clypeus, lower face and underside of head, propleuron, pronotum, meso- and metapleuron, upper part of propodeum and coxa I.

Distribution

It is known only from its type locality, Ouinné (Fig. 12C).

Remarks

Gasteruption jenningsi sp. nov. can be distinguished from the three species of Gasteruption from New Caledonia, G. lacoulee Jennings, Krogmann & Parslow, 2015, G. maquis Jennings, Krogmann & Parslow, 2015 and G. sarramea Jennings, Krogmann & Parslow, 2015 (Jennings et al. 2015), by the absence of the first discal cell of the fore wing, its elongated hind coxa, and the presence of a white large sub-basal ring on the hind tibia and a large sub-apical ring on the ovipositor.

The absence of the first discal cell of the fore wing is a rare condition in the species of Gasteruption, and reported from G. subhamatum Pasteels, 1958 (Zhao et al. 2012) known from Borneo and China and from G. tomanivi Parslow, Stevens & Schwarz, 2018 from Fiji (Parslow et al. 2018). Among these two species of Gasteruption, G. jenningsi sp. nov. seems more related to G. tomanivi with which it shares the presence of white rings on the hind tibia and the ovipositor, as well as the black TS 1 on the hind leg. However, G. jenningsi sp. nov. can be distinguished from G. tomanivi in particular by the coloration, and the shape of the propleuron and the hind coxa.