Seticornuta carinata, 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 : 155-157

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scientific name

Seticornuta carinata

sp. nov.

Seticornuta carinata sp. nov.

Figs 2 View Fig , 10E View Fig , 11A View Fig


This species can be recognized by this combination of features: pronotum and mesoscutum black, and metapleuron three-sided with the dorsal margin evenly declivous.


The specific epithet ‘ carinata ’ means ‘keeled’ in Latin.

Material examined


BRAZIL • ♀; “S.J. [São José do] Barreiro, Serra da Bocaina Braz. [Brazil] 1650m XI-68 Alvarenga & Seabra ”; USUC.



MEASUREMENTS. Body length 9.7 mm. Fore wing length 6.7 mm.

HEAD. Face+clypeus 1.1 × as wide as long; labrum not exposed when mandibles closed; malar space 0.7 × as long as basal mandibular width; lateral ocellus separated from compound eye by 1.5 × ocellar diameter; distance between ocelli 2.0 × maximum ocellar diameter; head posteriorly behind ocellar triangle concave; gena, in lateral view, 0.7 × as long as compound eye; occipital carina complete; antenna with 29 flagellomeres, ratio of length from second to fourth flagellomeres: 1.1:0.9:0.9, subapical flagellomere 1.0 × as long as centrally wide.

MESOSOMA. Epicnemial carina complete; metapleuron rectangular, dorsal margin weakly declivous and posteriorly evenly declivous, polished with few isolated setae; submetapleural carina smooth, anteriorly expanded into a conspicuous rounded lobe. Propodeum with lateromedian longitudinal carina strong, parallel; lateral longitudinal carina faint, complete; posterior transverse carina complete. Fore wing with Cu1a between Cu1b and 2m-cu 1.2 × as long as Cu1 between Rs&M and 1m-cu. Hind wing with distal abscissa of Cu1 sclerotized throughout.

METASOMA. Metasoma with tergite I 1.0 × as long as posteriorly wide, lateromedian carinae extending along length of tergite; tergite II 0.9 × as long as posteriorly wide; laterotergite II 0.7 × as long as wide, wedge-shaped, mesal edge convex; laterotergite III 0.8 × as long as wide, semicircular.

COLOR. Predominantly black except palpi, anterior third of tegula, meso- and metatibia basally, a band on basal quarter of mesobasitarsus, a band on basal third of metabasitarsus, and spurs of meso- and metatibia off-white; mesotarsomeres (except basal quarter of mesobasitarsus) testaceous; and proleg (except coxa) tawny; wings slightly infuscate.




This species was collected in the Brazilian state of São Paulo ( Fig. 11A View Fig ), at the same locality and date as S. rufa sp. nov.