Pristomerus roberti Rousse, Villemant & Seyrig, 2013

Rousse, Pascal & Noort, Simon van, 2015, Revision of the Afrotropical species of Pristomerus (Ichneumonidae: Cremastinae), with descriptions of 31 new species, European Journal of Taxonomy 124, pp. 1-129 : 87-89

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Pristomerus roberti Rousse, Villemant & Seyrig, 2013


Pristomerus roberti Rousse, Villemant & Seyrig, 2013  

Fig. 31 View Fig

Diagnosis (range of variation from Rousse et al. 2013)

Moderately small; yellow to yellowish-orange overall with tergites 1–3 variously blackened; frons, face and clypeus moderately densely punctate-granulate, remainder of head coriaceous; inner margins of eyes subparallel; clypeus strongly transverse; malar line long; occipital carina joining hypostomal carina shortly above mandible base; antenna with 28–32 flagellomeres, penultimate flagellomere subquadrate; mesosoma moderately elongate and densely punctate but pronotum dorsally and ventral half of speculum smooth; female femoral tooth small, followed by minute denticles; ovipositor long, its apex distinctly sinuous. B 7.0–8.4; A 3.8–4.6; F 3.6–4.3; CT 2.1; ML 0.7; POL 0.9; OOL 1.2; Fl n–1 1.1; ASM 2.0; OT 1.8–2.1; FFT 1. Male with mesoscutum weakly sculptured, mostly coriaceous, inner margins of eyes distinctly diverging ventrally, ocelli enlarged, femur and femoral tooth strongly stouter. POL 0.6; OOL 0.4.

Differential diagnosis

Rather small, overall yellow to yellowish orange with metasoma basally black; differentiated from all other Afrotropical species by the combination of the rather strongly transverse clypeus, the long malar line, the small female femoral tooth and the markedly long ovipositor. Morphologically close to other Pristomerus   species in Madagascar: P. kelikely   and related species, which have a shorter malar line and no femoral tooth in the female; P. patator   , which is distinctly larger with longer antennae and an incompletely carinate area superomedia; and the widespread P. pallidus   , which has a shorter ovipositor and nearly always a differently coloured mesosoma with the notaulus and the scutellum paler than the remainder of the mesonotum. Pristomerus roberti   is otherwise probably closely related to P. herero   sp. nov. (see differential diagnosis of P. herero   sp. nov.).

Material examined

Holotype MADAGASCAR: ♀, “ MADAGASCAR, Bekily [Ampandrandava], reg. sud de l’île, III. 33, EY 0000003511” ( MNHN).  




France, Paris, Museum National d'Histoire Naturelle


Museum National d'Histoire Naturelle