Pristomerus roberti, Rousse & Villemant & Seyrig, 2013

Rousse, Pascal, Villemant, Claire & Seyrig, André, 2013, Ichneumonid wasps from Madagascar. VI. The genus Pristomerus (Hymenoptera: Ichneumonidae: Cremastinae), European Journal of Taxonomy 49, pp. 1-38: 28-30

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Pristomerus roberti

sp. nov.

Pristomerus roberti   sp. nov.

Fig. 14 View Fig


Moderately large species; face orange; general coloration testaceous-orange with tergites 2–3 and apex of tergite 1 blackish brown; face at least latero-medially punctate, clypeus strongly transverse and granulate; mesoscutum densely punctate (almost smooth in male), scutellum moderately punctate; area superomedia about 2 x longer than wide; female femoral tooth small; ovipositor long, apically sinuate; POL 0.9; OOL 1.2; CT 2.5; ML 0.4; OT 2.2; FFT 1.

Differential diagnosis

Species closely related to P. cunctator   , distinguishable by the color pattern and the longer ovipositor. The mesonotum of P. roberti   is uniformly orange, without any yellowish orange markings on notauli and scutellum.


Named for Thierry Robert, entomologist at the Office National des Forêts.

Type material


MADAGASCAR: ♀ ( MNHN EY3511), Ampandradava, 23°50’ S, 44°52’ E, verbatim label data: “Madagascar, Bekily [Ampandrandava], reg. sud de l’île, III. 33 ”, complete.



MADAGASCAR: 11 ♀♀ (EY3512–3522), 6 ♂♂ (EY3523–3528), Bekily, Feb. 1932, Jan.-Mar., May and Dec. 1933; 2 ♀♀ ( CAS), 2 ♀♀ ( BNHM, MRAC), 3 ♂♂ ( AMNH, ISAM, NMKB), same locality, same dates.



LENGTH. 4.1, 3.8 (3.6–4.3) (10 specimens).

HEAD. Constricted behind eyes. Vertex and temple granulate, frons laterally densely punctate-granulate. Ocellar triangle almost equilateral. Face about as wide as frons, mid-longitudinally bulging, shining and at least latero-medially punctate. Clypeus strongly transverse, smoother, moderately granulate. Mandible stout, malar line short. Antenna with 27–32 flagellomeres.

MESOSOMA. Moderately elongate, nearly 2 x longer than high. Pronotum smooth with sparse punctures ventrally. Mesoscutum and all pleurae shining and densely punctate, speculum smooth. Scutellum moderately punctate. Propodeum with carination thick, densely punctate-granulate, area basalis opposite, area superomedia about 2 x longer than wide. Legs: hind femur with a small tooth.

METASOMA. Post-petiole, tergite 2 and base of tergite 3 finely aciculate, the following alutaceous with rare punctures. Thyridia elongate. Ovipositor long, its apical third slightly sinuate.

COLOR. Testaceous-orange. Mandible, clypeus, inner and outer orbits and sometimes face paler. Antenna fuscous. Post-petiole and tergites 2–3 dark brown. Tergite 1 and 2 with yellow hind margin. Tergite 3 paler at apex. Thyridiae yellow. Hind leg infuscate with apex of femur and dorsal margin of tibia paler. Wings hyaline, pterostigma dark brown.


Length: 3.9 (3.7–4.1) (4 specimens). Mesonotum almost smooth. Face ventrally widened and distinctly larger than frons. Posterior ocelli close to eyes (OOL = 0.2), inter-ocellar distance greater (POL = 0.6). Hind femur swollen, femoral tooth stout and sharp followed by a row of small denticles. Metasoma darker than in female. Hind coxa and femur orange, hind tibia and tarsus brown. Otherwise similar to female.


Madagascar (Toliara province).


France, Paris, Museum National d'Histoire Naturelle


Museum National d'Histoire Naturelle


California Academy of Sciences


Beijing Natural History Museum


Musée Royal de l’Afrique Centrale


American Museum of Natural History