Pristaulacus elveni, 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 : 8-12

Pristaulacus elveni sp. nov.

urn:lsid:zoobank.org:act:341D295B-75B1-483C-A54C-5511C17E460D

Figs 3–4 , 12A

Diagnosis

Light orange species with few black or dark brown markings on head, mesoscutum and metasoma. Head 1.35 × as wide as long; antenna with scape 1.58 × as long as pedicel; F-II more than twice as long as F-I. Dorsal face of propodeum in lateral view strongly concave basally then convex, with single transversal carina on convexity.

Etymology

The specific epithet refers to the first name of Thibault Ramage’s son, Elven. 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′8.96″ S, 165°0′33.83″ E; alt. 306 m; 18 Oct.–2 Nov. 2017; E. Poirier leg.; Malaise trap n°KAT3-MAL4; left mid leg missing and ovipositor sheath broken; MNHN.

Paratype

NEW CALEDONIA • 1 ♀; same collection data as for holotype; MNHN .

Description

MEASUREMENTS (in mm except CI, EI and OI; holotype in brackets). BL = 5.80 (6.70); HL = 1.05 (1.05); HW = 1.32 (1.42); EL = 0.71 (0.75); EW = 0.57 (0.62); OOL = 0.16 (0.18); POL = 0.20 (0.22); SL = 0.27 (0.27); PDL = 0.17 (0.17); F-I = 0.27 (0.30); F-II = 0.60 (0.62); FWL = 5.10 (5.50); HWL = 3.20 (3.50); MSL = 2.30 (2.40); MSW = 1.15 (1.30); MTL = 2.90 (3.20); OL = 5.60 (4.90); CI = 125 (135); EI = 80 (82); OI = 109 (89).

Female holotype

COLOR. Light orange species; mandibles apex, pedicels and flagellae, large spot around ocelli reaching dorsal margin of eyes, transversal stripe on posterior margin of mesoscutum and hind tarsomeres black; apical ¾ rd of hind tibiae, sub-basal (sometimes absent) and sub-apical rounded spot on T-I, median rounded spot on T-II to T-VI and ovipositor brown. Fore wing with membrane yellow basally, hyaline in its apical half and infuscated apically; veins brown. Hind wing with membrane yellow basally, hyaline in its apical half and slightly infuscated apically; veins brown.

HEAD ( Fig. 4A, C ). In full-face view, 1.35 × as wide as long, vertex convex; mandibles tridentate; clypeus slightly convex, with small blunt projected tooth medially; malar space as long as scape, margin sinuate; antenna 14-segmented, scape 1.58 × as long as wide, 1.58 × as long as pedicel, and as long as F-I, F-I slightly longer than F-II, 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 small isosceles triangle, mid-ocellus separated from lateral ocelli by its diameter, lateral ocelli separated by nearly 3.00 × their diameter and by twice their diameter from eye margin; posterior margin of head conspicuously concave in dorsal view; occipital carina present.

MESOSOMA ( Fig. 4B ). 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 narrow; mesepimeron elongate; dorsal face of propodeum in lateral view strongly concave basally becoming convex distally, with transversal carina separating medially dorsal convex and concave surface, and carina surrounding metasomal insertion directed downward to hind coxa, posterior face of propodeum slightly concave under metasomal insertion; protrochantellus present; tibial spurs formula 1-2-2, protibial spurs bifid apically, with midand hind-tibial spurs equal and similar in shape; hind coxa with ovipositor guide on inner surface, somewhat distal, transverse and somewhat oblique; hind femur 0.63 × as long as hind tibia; TS 1 2.80 × as long as TS 2; TS 2 1.60 × as long as TS 3; TS 3 2.50 × as long as TS 4; TS 4 0.50 × as long as TS 5; hind tarsal claw 0.50 × as long as TS 5; tarsal claw with two sub-apical teeth equidistant and equal in length, apical tooth as long as preceding ones.

FORE WING ( Fig. 4E ). 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 quarter and posterior fifth, remainder nebulous.

HIND WING ( Fig. 4F ). With 2 hamuli; venation reduced in Sc +R; M +Cu, A, beginning of Cu and 2-M present; 2-M tubular in its apical ¾ rd; M+ Cu and A nebulous.

METASOMA ( Fig. 4D ). 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, pronotum, sides of mesosoma densely puncticulate (except small transverse depression between axillae and anterior median triangle on mesoscutum). Mesoscutum (except anterior median triangle and posterior margin), axillae, scutellum with transversal ridges. Lateral depression of metanotum, metapostnotum with longitudinal ridges. Propodeum basally and medially with 3 or 4 longitudinal ridges, laterally with 3 ridges directed toward metasomal insertion and under propodeal declivity with longitudinal and oblique ridges.

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

Figures

Fig. 3. Pristaulacus elveni sp. nov., holotype, ♀ (MNHN), lateral habitus. Scale bar = 1.0 mm.

Fig. 4. Pristaulacus elveni 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 fore wing venation. F. Line drawing of hind wing venation. Scale bars: A–D, F = 0.5 mm; 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.