Pristaulacus villemantae, Ramage & Jouault, 2020

Ramage, Thibault & Jouault, Corentin, 2020, New species and records of Evanioidea and Stephanoidea from New Caledonia (Hymenoptera), European Journal of Taxonomy 723, pp. 1-32 : 12-14

Pristaulacus villemantae sp. nov.

urn:lsid:zoobank.org:act:3CEB16BE-DBFE-404A-96BD-5F65354B77DA

Figs 5 , 12A

Diagnosis

Mainly black species. Head 1.20 × as wide as long; antenna with scape 2.00 × as long as pedicel, F-II twice as long as F-I. Dorsal face of propodeum in lateral view shallowly concave basally then convex, with several transversal carinae on convexity.

Etymology

The specific epithet is a patronym honoring Dr Claire Villemant (MNHN), who greatly contributes to the knowledge of Hymenoptera , especially of Ichneumonidae . The species epithet is to be treated as a noun in the genitive case.

Type material

Holotype

NEW CALEDONIA • ♀; Grande Terre, Province Nord, Poindimié, Katalupaik ; 20°51′5.04″ S, 165°0′34.37″ E; alt. 305 m; 18 Oct.–2 Nov. 2017; E. Poirier leg.; Malaise trap n°KAT-MAL CAMP; MNHN.

Paratypes

NEW CALEDONIA • 9 ♀♀; same collection data as for holotype; MNHN • 3 ♀♀; same collection data as for holotype; 20°51′8.99″ S, 165°0′41.68″ E; alt. 307 m; E. Poirier leg.; Malaise trap n°KAT3-MAL1; MNHN .

Description

MEASUREMENTS (in mm except CI, EI and OI; holotype in brackets). BL = 6.40 – 9.30 (7.6); HL = 0.92 – 1.60 (1.30); HW = 1.25 – 1.95 (1.56); EL = 0.70 – 1.10 (0.86); EW = 0.50 – 0.90 (0.70); OOL = 0.12–0.16 (0.14); POL = 0.23–0.29 (0.24); SL = 0.20 – 0.30 (0.26); PDL = 0.12 – 0.17 (0.13); F-I = 0.25 – 0.45 (0.33); F-II = 0.50 – 0.85 (0.66); FWL = 5.60 – 9 (7); HWL = 3.50 – 5.40 (4.50); MSL = 2.55 – 4.20 (3.35); MSW = 1.17 – 1.90 (1.40); MTL = 2.65 – 3.90 (3.60); OL = 4.75 – 7 (6); CI = 122 – 135 (120); EI = 0.71 – 81 (81); OI = 77 – 84 (85).

Female holotype

COLOR. Mainly black species; base of mandibles, fore and mid legs, hind protrochantellus and base of tibiae, metasomal spiracle, lateral small transverse stripe at T-I mid-length, ovipositor dark-orange. Fore wing with membrane slightly yellow basally, hyaline in its apical half conspicuously infuscated apically; veins black. Hind wing with membrane hyaline; veins black.

HEAD ( Fig. 5A, C ). In full-face view, 1.20 × as wide as long, vertex slightly convex; mandibles tridentate; clypeus slightly convex, with small blunt projected tooth medially; malar space as long as scape, margin sinuate; antenna 14-segmented, scape about 1.30 × as long as wide, 2 × as long as pedicel; F-I 1.26 × as long as scape, F-II twice as long as F-I, both more than twice as long as wide; flagellomeres III- XI shortening gradually toward apex; apical flagellomere slightly longer than preceding one; frons without lateral medial carina above torulus; vertex with ocelli arranged in isosceles triangle, mid-ocellus separated from lateral ocelli by slightly less its diameter, lateral ocelli separated by slightly more than their diameter and by 1.50 × their diameter from eye margin; posterior margin of head slightly concave in dorsal view; occipital carina present.

MESOSOMA ( Fig. 5B ). Propleuron ventrolateral carina present; pronotum without angular process; mesoscutum in lateral view slightly angular anterodorsally, notauli conspicuous and parapsidal lines present; small transverse depression between axillae, mesoscutum and scutellum; metapostnotum wide; mesepimeron elongate; propodeum in lateral view shallowly concave basally becoming convex distally, with transversal carina separating medially dorsal convex surface and carina surrounding metasomal insertion and directed downward to hind coxa, posterior face of propodeum concave under metasomal insertion; protrochantellus present; tibial spurs formula 1-2-2, protibial spurs bifid apically, with mid- and hind-tibial spurs equal and similar in shaped; hind coxa with ovipositor guide on inner surface, somewhat distal, transverse and somewhat oblique; hind femur 0.65 × as long as hind tibia; TS 1 2.88 × as long as TS 2; TS 2 1.80 × as long as TS 3; TS 3 2.50 × as long as TS 4; TS 4 0.40 × as long as TS 5; hind tarsal claw 0.40 × as long as TS 5; tarsal claw with two equidistant sub-apical teeth, basal tooth shorter than second one; apical tooth longer than preceding ones.

FORE WING ( Fig. 5E ). Vein 2-Rs+M very short; second discal cell elongate; vein 2r-m almost absent except for slight node on medial vein; vein 3r-m tubular in anterior ²/5 th and posterior ¹/10 th, remainder nebulous.

HIND WING ( Fig. 5E ). With 2 hamuli, venation reduced in Sc + R, r-m, M +Cu, A; beginning of Cu and 2-M present; Sc +R and 2-M tubular, others nebulous.

METASOMA ( Fig. 5D ). Elongate, longer than mesosoma; T-I more than 3.00 × as long as T-II; T-II to T-VI of similar length.

SCULPTURE. Head, mesosoma (except small transverse depression between axillae and anterior median triangle on mesoscutum) densely and slightly puncticulate. Frons and vertex with shallow ridges. Mesoscutum (except anterior median triangle and posterior margin), axillae, scutellum, dorsum of propodeum, dorsal face of mid and hind coxae with transversal ridges. Lateral depression of metanotum with longitudinal ridges. Metapostnotum, lateral and posterior face of propodeum reticulate. Tergite of metasoma micro-reticulate, reticulation becoming stronger toward apex.

PILOSITY. Small, erect, dense on all the body, sparse and less conspicuous on metasoma, absent on mesoscutum anterior median triangle and T-I and T-II.

Distribution

It is known only from its type locality, Katalupaik ( Fig. 12A ).

Remarks

Pristaulacus villemantae sp. nov. can easily be distinguished from P. elveni sp. nov. by its black coloration, the more elongate mesosoma, and the dorsal face of propodeum less concave basally and with the presence of several transversal ridges on the posterior half (dorsal face of propodeum strongly concave basally and with a single transverse ridge on the posterior half in P. elveni sp. nov.).

Figures

Fig. 5. Pristaulacus villemantae sp. nov., holotype, ♀ (MNHN). A. Head in lateral view. B. Mesosoma in lateral view. C. Head in full-face view. D. Metasoma in lateral view. E. Line drawing of wings venation. Scale bars: A–C = 0.5 mm; D–E = 1.0 mm.

Fig. 12. A. Distribution of Aulacus pascali sp. nov., Pristaulacus elveni sp. nov. and Pristaulacus villemantae sp. nov. B. Distribution of Aulacus burwelli Jennings, Austin & Stevens, 2004; red circle = type locality; blue circle = specimens concerned by this study. C. Distribution of Gasteruption jenningsi sp. nov.; red circle = type locality; blue circle = specimens concerned by this study. D. Distribution of Gasteruption maquis Jennings, Krogmann & Parslow, 2015; red circle = type locality; blue circle = specimens concerned by this study. E. Distribution of Pseudofoenus caledonicus Jennings & Austin, 2005; red circles = localities previously published; blue square = specimens concerned by this study. F. Distribution of Parastephanus mouensis Aguiar, 2005; red circle = type locality; blue circle = specimens concerned by this study.