Grotea Cresson, 1864

Lima, Alessandro Rodrigues & Kumagai, Alice Fumi, 2024, Two new species of Grotea Cresson (Hymenoptera, Ichneumonidae, Labeninae) from Brazil, Zootaxa 5403 (1), pp. 104-114 : 106

Key to Brazilian species of Grotea Cresson, 1864

1. Gena close to the junction of occipital and hypostomal carinae projected into a lobe of varying shapes ( Figs 2D , 3B ); head subglobose in frontal view ( Figs 1 , 2F ).................................................................... 2

1’. Gena close to junction of occipital and hypostomal carinae not projected ( Fig. 4B ); head narrow in frontal view, distinctly higher than wide ( Fig. 4C )............................................................ Grotea fernandoi sp. n.

2. Fore wing with postnervulus straight or evenly arched anteriorly ( Figs 2A , 3A ).................................... 3

2’. Fore wing with postnervulus broken, with abscissas forming a distinct obtuse angle ( Fig. 5B )......................... 5

3. Pronotum mediodorsally with a transverse crest ( Figs 2D, 2E ). Hind wing nervellus with CU abscissa distinctly shorter than cu-a ( Fig. 2A )........................................................................................ 4

3’. Pronotum mediodorsally virtually flat, without crest ( Fig. 3C ). Hind wing nervellus with CU abscissa equal or longer than cu-a ( Fig. 3A )................................................................. Grotea delicator (Thunberg, 1822)

4. Fore wing hyaline with apical brownish spot (apex of 4th submarginal and 3rd discal cells). Metasomal tergite I as long as mesosoma. Metapleuron mostly black, posterior margin yellow.................... Grotea manausi Herrera-Flórez, 2019

4’. Fore wing completely hyaline ( Fig. 2A ). Metasomal tergite I about 0.9x as long as mesosoma ( Fig. 2A ). Metapleuron mostly yellow, anterior and inferior margins black ( Fig. 2A )........................................ Grotea claudiae sp. n.

5. Fore wing with areolet intercepted by 2m-cu closer to 3rs-m than to 2rs-m ( Fig. 5B )................................ 6

5’. Fore wing with areolet intercepted by 2m-cu at middle, equally far from 3rs-m and 2rs-m................................................................................................... Grotea perplexa Slobodchikoff, 1970

6. Propodeal lateral longitudinal carinae absent. Mesopleuron orange, most of its anterodorsal part, a spot at the ventroposterior margin, and area delineated by the mesopleural suture yellow................... Grotea goianiense Herrera-Flórez, 2019

6’. Propodeal lateral longitudinal carinae present posterior to anterior transverse carina. Mesopleuron entirely orange ( Fig. 5A )........................................................................ Grotea paulista Herrera-Flórez, 2019

Figures

FIGURE 1. Schematic drawing of Grotea head, with measurements. A. eye height; B. head width; C. head height; D. eye width.

FIGURE 2. Grotea claudiae sp. n. Holotype. A. habitus in lateral view; B. mesosoma in posterodorsal view, detail of scutellum and propodeum; C. habitus in dorsal view; D. head and pronotum in lateral view; E. head and pronotum in dorsal view; F. head in frontal view. Scale bar in mm.

FIGURE 3. Grotea delicator. A. habitus in lateral view; B. head in postero-ventrolateral view, detail of projection of gena (close to the junction of occipital and hypostomal carinae); C. prothorax in dorsal view, detail on the anterior margin impressed and strongly reflexed; D. hind wing, detail of the distribution of distal hamuli on vein RA. Scale bar in mm.

FIGURE 4. Grotea fernandoi sp. n. Holotype. A. habitus in lateral view; B. head in postero-ventral view, detail of gena close to the junction of occipital and hypostomal carinae; C. head in frontal view; D. head in lateral view; E. fore and hind wings. Scale bar in mm.

FIGURE 5. Grotea paulista. A. habitus in lateral view; B. habitus in dorsal view. Scale bar in mm.