Seticornuta anchanchu, Alvarado, 2022

Alvarado, Mabel, 2022, Darwin wasps of the genus Seticornuta Morley, 1913 (Ichneumonidae: Metopiinae) in the Neotropical region, with a key to species, European Journal of Taxonomy 839, pp. 149-175 : 153-155

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Seticornuta anchanchu

sp. nov.

Seticornuta anchanchu sp. nov.

Figs 1 View Fig , 10J View Fig , 11A View Fig


This species can be recognized by this combination of features: mesoscutum tawny, pronotum anteroventrally black and posterodorsally off-white, and metapleuron rectangular.


The specific epithet ‘anchanchu’ is in reference to a demon from the Aymara mythology which haunts isolated places and caves. It is treated as a noun in apposition.

Material examined


BOLIVIA • ♀; “BOLIVIA: Santa Cruz: Los Volcanos field stn : S18°6′ W63°36′: 1000m: 2.xi–12. xii.2004: Malaise Mendel & Barclay: BMNH(E) 2005-55”; NHMUK. GoogleMaps



MEASUREMENTS. Body length 7.7 mm. Fore wing length 5.9 mm.

HEAD. Face+clypeus 1.0 × as wide as long; labrum exposed when mandibles closed; malar space 0.7 × as long as basal mandibular width; lateral ocellus separated from compound eye by 0.5 × ocellar diameter; distance between ocelli 1.1 × maximum ocellar diameter; head posteriorly behind ocellar triangle concave; gena on lateral view 0.7 × as long as compound eyes; occipital carina complete; antenna with 27 flagellomeres, ratio of length from second to fourth flagellomeres: 1.3:1.2:1.2, subapical flagellomere elongate, 1.4 × as long as centrally wide.

MESOSOMA. Epicnemial carina complete; metapleuron rectangular, dorsal margin weakly declivous posteriorly, abruptly down turned, postero-dorsally curved forming an obtuse angle, glabrous; submetapleural carina smooth, anteriorly expanded into a conspicuous triangular lobe. Propodeum with lateromedian longitudinal carina strong, parallel; lateral longitudinal carina strong, absent anterior to spiracle; posterior transverse carina present. Fore wing with Cu1a between Cu1b and 2m-cu 1.6 × as long as Cu1 between Rs&M and 1m-cu. Hind wing with distal abscissa of Cu1 sclerotized throughout, abscissa of M faint.

METASOMA. Metasoma with tergite I 0.7 × as long as posteriorly wide, lateromedian carinae extending 0.9 × length of tergite; tergite II 0.7 × as long as posteriorly wide; laterotergite II 0.6 × as long as wide, wedge-shaped, mesal edge concave; laterotergite III 0.9 × as long as wide, semicircular.

COLOR. Head extensively off-white, frons, interocellar area, vertex, upper posterior half of gena, pedicel, and antennomeres black; scape dorsally and palpi brown. Mesosoma predominantly off-white except for pronotum anteroventrally, mesosternum, metapleuron ventro-anteriorly dark brown; mesoscutum tawny; scutellum black, posteriorly off-white; propodeum black. Fore leg off-white, coxa dorsally, femur latero-externally centrally, tarsomeres dark brown; tibia grading distally to brown. Mid leg offwhite; coxa ventrally and femur ventro-laterally light brown; tibia ventrally and laterally, tarsomeres dark brown. Hind leg off-white, coxa ventrally, femur latero-externally, tibia ventrally and with distal margin, metatarsomere 1 with distal quarter, tarsomeres 2–5 brown; wings faintly infuscate; metasomal tergites black.




This represents the first record of Seticornuta for Bolivia ( Fig. 11A View Fig ).


Natural History Museum, London

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