Pristomerus hansoni, 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: 16-17

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scientific name

Pristomerus hansoni

sp. nov.

Pristomerus hansoni   sp. nov.

Fig. 7 View Fig


Large species; face ivory white; head white and black, mesosoma and metasoma orange; face transverse and almost smooth with sparse punctures, clypeus slightly transverse, smooth; mesoscutum moderately punctate-granulate, scutellum sparsely punctate; area superomedia about 3 x longer than wide; female femoral tooth absent; ovipositor very long, its apex sinuate; POL 0.7; OOL 0.8; CT 1.5; ML 0.6; OT 2.8–3.2; FFT 0.

Differential diagnosis

Species closely related to P. caris   , from which it differs by the characters given in the key; the ovipositor is strikingly longer than in any other Pristomerus   species in Madagascar.


Dedicated to Ace Hanson.

Type material


MADAGASCAR: ♀ ( MNHN EY3620), Rogez, 48°18’ S, 48°32’ E, verbatim label data: “Madagascar, Rogez, forêt côte est, XII. 30 ”, left antenna lacking.



MADAGASCAR: 20 ♀♀, 5 ♂♂ ( MNHN EY3621–3645), same locality, Sep. and Dec. 1930, Jan., Feb., May, Nov. and Dec. 1931, Feb. 1932; 1 ♀ ( MNHN EY3646), Andreba, Nov. 1933; 1 ♀, 1 ♂ ( MNHN EY3647–3648), Ivondro, Jan. 1939; 8 ♀♀ ( CAS), Rogez, Dec. 1931; 7 ♀♀, Rogez, Dec. 1930, Jan., Nov. 1931 (one to each of the other above mentioned institutions).

Other material examined

MADAGASCAR: 4 ♀♀, 2 ♂♂ ( MNHN), Rogez, Sep. and Dec. 1930, Feb. 1931; 1 ♀ ( MNHN), Andreba, Nov. 1933.



LENGTH. 5.5, 6.1 (5.5–6.7) (10 specimens).

HEAD. Strongly constricted behind eyes. Temple very short. Ocellar triangle equilateral. Vertex and frons granulate with sparse punctures. Face rectangular, almost 2 x wider than long, almost smooth with sparse punctures. Frons mid-longitudinally bulging, finely granulate and sparsely punctate. Clypeus

smooth, slightly transverse. Mandible stout and moderately long, malar line rather short. Antenna thin with 33–39 flagellomeres. Flagellomere 1 about 6 x longer than apically wide.

MESOSOMA. Moderately elongate, about 2 x longer than high. Pronotum and speculum smooth. Mesoscutum moderately punctate-granulate, shining. Scutellum smooth with sparse punctures. Mesopleuron more sparsely punctate, almost smooth between punctures. Metapleuron granulate. Propodeum long, shining, its surface finely granulate and sparsely punctate. Area basalis opposite or truncate, area superomedia 3 x longer than wide, area petiolaris as long as superomedia. Legs: elongate, hind femur slender, femoral tooth absent.

METASOMA. Tergites 1 and 2 finely aciculate, following tergites alutaceous. Tergite 2 as long as tergite 1 and about 2 x longer than wide. Ovipositor very long with its apical 1/3 conspicuously sinuate.

COLOR. Orange overall with flagellum and ovipositor sheath brownish. Head ivory white with frons centrally, vertex and occiput dark brown. Wings hyaline, pterostigma orange.


Length: 5.6 (4.7–6.3) (7 specimens). Ocellus large; posterior ocelli closer to eyes (OOL = 0.2) than to each other (POL = 0.3). Mesosoma smoother. Hind femur with a sharp ventral tooth followed by a row of denticles, hind tibia longer and stouter, widened apically. Otherwise similar to female.


Madagascar (Toamasina and Antsiranana province).


France, Paris, Museum National d'Histoire Naturelle


Museum National d'Histoire Naturelle


California Academy of Sciences