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

Seticornuta anchanchu sp. nov.

urn:lsid:zoobank.org:act:8EF1FE21-4438-444D-83F0-FF5CC38EDAF8

Figs 1 , 10J , 11A

Diagnosis

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

Etymology

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

Holotype

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.

Description

Female

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.

Male

Unknown.

Remark

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

Figures

Fig. 1. Details of Seticornuta anchanchu sp. nov., ♀, holotype (NHMUK). A. Habitus, lateral view. B. Facial view. C. Head, mesoscutum, propodeum and first three metasomal tergites. 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.