Pristomerus hutu, Rousse & Noort, 2015

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 : 50-52

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scientific name

Pristomerus hutu

sp. nov.

Pristomerus hutu sp. nov.

Fig. 12 View Fig


Most of body ventrally and laterally mostly pale yellow to yellowish-orange, dorsally nearly entirely black; face except orbits dark brown; fore and mid legs yellowish-orange, hind legs mostly dark brown to black, femora and trochanters apically white-dotted; anterior edge of pterostigma whitish; face laterally densely punctate, clypeus and middle of face sparsely and finely punctate; clypeus weakly transverse, convex in profile; malar line short; remainder of head coriaceous; antenna with 28–31 flagellomeres; mesosoma moderately to densely punctate but pronotum almost entirely smooth, speculum ventrally smooth, and area superomedia usually transversely striate; area superomedia elongate, usually hardly delimited laterally beyond anterior transverse carina; female femoral tooth weak but distinct; ovipositor moderately long, apically moderately sinuous. Male with ocelli and hind femur enlarged, femoral tooth long and acute, otherwise similar to female.

Differential diagnosis

Moderately sized, ventrally yellow to orange and dorsally black. Differentiated from all other Afrotropical Pristomerus species by the combination of the light facial orbits, the always black scutellum, the very short malar line, and the weak though distinct female femoral tooth.

Type material


UGANDA: ♀, “ UGANDA, Kibale National Park, Kanyawara, Makerere University Biological field station, 1505 m, 0°33.859’N 30°21.630’E, 31.vii–3.viii.2005, S van Noort, UG05–M07, Malaise trap, primary mid–altitude rainforest, SAM–HYM–P047386” ( SAMC).



UGANDA: 2 ♀♀, same label data except: “ 1495 m, 0°33.996’N 30°21.262’E, 5–12.viii.2005, UG 05– M15, secondary mid-altitude Rainforest, SAM–HYM–P047387” ( SAMC); 1 ♀, same label data except: “ 3–5.vii.2005, UG 05–M12, SAM–HYM–P047398” ( SAMC); 1 ♀, same label data except: “12–185. viii.2005, UG 05–M19, SAM–HYM–P047399” ( SAMC); 1 ♀, same label data except: “ 0°33.871’N 30°21.355’E, 12–26.viii.2008, UG 08–KF2–M12, secondary mid-altitude Rainforest, SAM–HYM– P047388” ( SAMC); 1 ♀, same label data except: “ 1505 m, 0°33.823’N 30°21.490’E, 2–12.viii.2008, UG 08–KF3–M03, primary mid-altitude Rainforest, SAM–HYM–P047400” ( SAMC); 2 ♀♀, 1 ♂, “Uganda, Rwenzori Mts, nr. Nyakalengija village, along Mubuku river. ~ 1640 m 12.III.2013 A. Gumovsky; agricultural landscape with cultivated plants + some ruderal plants, SAM–HYM–P047389” ( SAMC).

CENTRAL AFRICAN REPUBLIC: 1 ♀, “ Central African Republic, Préfecture Sangha-Mbaéré, Parc National de Dzanga-Ndoki, Mabéa Bai, 21.4 Km 53°NE Bayanga, 3°02.01’N 16°24.57’E, 510m, 6–7.v.2001, S. van Noort, Malaise trap, CAR 01–M58, Lowland Rainforest, marsh clearing, SAM– HYM–P047390” ( SAMC).


Female (10 specimens)

B 6.5–7.2; A 4.1–4.5; F: 4.0–4.4; CT 1.6; ML 0.3; POL 0.5; OOL 0.9; Fl n-1 1.3; ASM 2.3; OT 1.5–1.8; FFT 1.

COLOUR. Background colour of head yellowish-orange with face often medially dark brown, mandible, malar space, clypeus and frontal orbit sometimes pale yellow, and frons, inter-ocellar area, and occiput black; background colour of mesosoma orange, dorsally entirely black except sometimes notaulus and lateral margin of mesoscutum, metanotum and a variable basal part of propodeum; tergites 1–2 nearly entirely black, following tergites pale yellow to orange with a large median black spot of variable extent; fore and mid legs yellowish-orange, hind leg mostly dark brown to black, all trochanters and femora apically white; wings hyaline, venation brown, pterostigma more or less whitish anteriorly.

HEAD. Face moderately densely and deeply punctate, punctation sparser and finer on median bulge; inner margins of eyes weakly converging ventrally; clypeus barely transverse, long, distinctly convex in profile view, shallowly and sparsely punctate; malar line very short; frons, vertex and temple coriaceous; occipital carina joining hypostomal carina shortly above mandible base; antenna with 28–32 flagellomeres, penultimate flagellomere slightly elongate.

MESOSOMA. Moderately elongate; pronotum almost smooth; mesopleuron moderately punctate with an oblique shallowly striate furrow below speculum, ventral half of speculum smooth; metapleuron moderately and shallowly punctate-granulate; mesoscutum coarsely and densely punctate-granulate, apical half with punctures confluent into transverse rugosities, notaulus moderate; scutellum densely and evenly punctate, its posterior vertical face longitudinally striate; propodeum moderately punctate, area superomedia elongate, usually hardly delimited laterally beyond anterior transverse carina and often transversely striate. Legs. Femoral tooth weak but always distinct, followed by minute denticles.

METASOMA. Tergite 2, apical half of tergite 1 and basal half of tergite 3 longitudinally aciculate, following tergites coriaceous; thyridium elliptic and more or less wide, its main axis longitudinal; ovipositor moderately long, its apical third moderately sinuous.

Male (paratype)

B 6.8; A 4.4; F: 4.2; POL 0.5; OOL 0.6. Ocelli and hind femur enlarged; femoral tooth long and acute, followed by strong denticles; otherwise similar to female.


Central African Republic, Uganda.


Iziko Museums of Cape Town


Museo del Departamento de Estratigrafia y Paleontologia