Seticornuta flava, 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 : 162-164

Seticornuta flava sp. nov.

urn:lsid:zoobank.org:act:B85C054C-3F42-4466-8155-42592020ECBA

Figs 5 , 10K , 11B

Diagnosis

This species can be recognized by this combination of features: pronotum yellow, mesoscutum yellow with three longitudinal brownish black vittae, and metapleuron rectangular.

Etymology

The specific epithet ‘ flava ’ is from the Latin, meaning ‘yellow’, in reference to the predominantly yellow mesosoma of this species.

Material examined

Holotype

BRAZIL • ♀; “ BRAZIL: Sta. Cata Nova Teutonia 28.4.1949 F. Plaumann Coll B.M. 1957–341”; NHMUK.

Paratype

BRAZIL • 1 ♀; “Brasilien Nova Teutonia 27°11′B 52°23′L, 300–500m 30.v.1952 Fritz Plaumann [ CNC493238 ]”; CNC.

Description

Female

MEASUREMENTS. Body length 8.4 mm. Fore wing length 5.3 mm.

HEAD. Face+clypeus 0.9 × as wide as long; labrum exposed when mandibles closed; malar space 0.5 × as long as basal mandibular width; lateral ocellus separated from compound eye by 0.7 × ocellar diameter; distance between ocelli 1.5 × maximum ocellar diameter; head posteriorly behind ocellar triangle concave; gena, on lateral view 0.8 × as long as compound eyes; occipital carina complete; antenna with 28 flagellomeres, ratio of length from second to fourth flagellomeres: 1.3:1.2:1.2, subapical flagellomere 1.3 × as long as centrally wide.

MESOSOMA. Epicnemial carina complete; metapleuron rectangular, dorsal margin weakly declivous posteriorly, abruptly down-turned, postero-dorsally curved forming 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 strong. 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 0.8 × as long as posteriorly wide, lateromedian carinae extending 0.8 × length of tergite; tergite II 0.8 × as long as posteriorly wide; laterotergite II 0.5 × as long as wide, wedge-shaped, mesal edge convex; laterotergite III 0.7 × as long as wide, semicircular.

COLOR. Head extensively light yellow with interocellar area black and area behind interocellar area (between posterior ocelli) brownish; antennae black; meso- and metatarsomeres with a distal band brownish; mesoscutum light yellow with three longitudinal brownish black vittae; wings hyaline; metasoma black.

VARIATION. The paratype differs from the holotype in the following: malar space 0.6 × as long as basal mandibular width; distance between ocelli 1.3 × its own maximum diameter; occipital carina complete, angled before reaching to hypostomal carina (at about 0.7 × as long as basal mandibular width); antenna with 29 flagellomeres, ratio of length from second to fourth flagellomeres: 1.3:1.1:1.1; fore wing with Cu1a between Cu1b and 2m-cu 1.5 × as long as Cu1 between Rs&M and 1m-cu; metasoma with tergite I 0.9 × as long as posteriorly wide, lateromedian carinae extending 0.7 × length of tergite; tergite II 0.7 × as long as posteriorly wide; laterotergite II 0.6 × as long as wide; laterotergite III 0.8 × as long as wide.

Male

Unknown.

Remark

This species was collected in the Brazilian state of Santa Catarina ( Fig. 11B ), at the same locality as S. curupira sp. nov.

Figures

Fig. 5. Details of Seticornuta flava sp. nov., ♀, paratype (CNC). A. Habitus, lateral view. B. Head, lateral view and mesoscutum C. Facial view. Scale bar = 1 mm.

Fig. 10. Seticornuta spp. A–B. S. cortesi Porter, 1998, head. A. Facial view, head ventrally. B. Facial view, head dorsally. C. S. cuckoo sp. nov., ♀, holotype (USUC), metapleuron. D. S. nigroflava sp. nov., ♀, holotype (SEMC), metapleuron. E. S. carinata sp. nov., ♀, holotype (USUC), metapleuron. F. S. quilmes sp. nov., ♀, holotype (USNM). G. S. rufa sp. nov., ♀, holotype (USUC), metapleuron. H. S. muqui sp. nov., ♀, holotype (MUSM). I. S. curupira sp. nov., ♀, holotype (USUC), metapleuron. J. S. anchanchu sp. nov., metapleuron. K. S. flava sp. nov., ♀, holotype (NHMUK), metapleuron.

Fig. 11. Geographic distribution of species of Seticornuta Morley, 1913 in the Neotropical region.