Grotea fernandoi Lima, 2024

Lima, Alessandro Rodrigues & Kumagai, Alice Fumi, 2024, Two new species of Grotea Cresson (Hymenoptera, Ichneumonidae, Labeninae) from Brazil, Zootaxa 5403 (1), pp. 104-114 : 109-112

Grotea fernandoi Lima sp. nov.

( Figs 4A–E )

Type locality. Brazil, Minas Gerais, Mariana.

Diagnosis. Head in frontal view 0.8× as high as wide. Malar space 0.9× as long as basal mandibular width. Gena close to the junction of occipital and hypostomal carinae not projected. Epicnemial carina complete, ending at the basal third of the height of the posterior edge of the pronotum.

Description (Holotype Female, pinned). Head in dorsal view with gena behind eyes evenly rounded; in frontal view 0.8× as high as wide. Occipital carina complete, equally raised on all its length. Posterior ocellus separated from eye by 1.9× its own maximum diameter. Compound eyes with a clear invagination at level of toruli; in frontal view 0.3× as wide as high. Malar space 0.9× as long as basal mandibular width. Groove between clypeus and face strong. Clypeus 1.8× as wide as high medially, apically concave. Labrum exposed, semicircular, sclerotized as clypeus. Gena close to the junction of occipital and hypostomal carinae not projected.Antenna with 31 flagellomeres; flagellomere I 0.83× as long as flagellomeres II and III combined; apical flagellomere 2.5× as long as preceding flagellomere.

Mesosoma 2.0 mm long, about 1.5× as long as tergite I; smooth with sparse setiferous punctures. Pronotum with anterior margin impressed and strongly reflexed, turned backwards as a small flange along its lateral portion, centrally not projected; mediodorsally flat; epomia absent. Mesopleuron depressed posteriorly, below speculum; epicnemial carina complete, ending at the basal third of the lower corner of pronotum. Scuto-scutellar groove deeply impressed. Scutellum distinctly convex, without carinae. Metapleuron slightly convex; submetapleural carina complete as a uniformly low translucent flange; juxtacoxal carina absent. Propodeum with area basalis rectangular, about 2.4× as long as wide; anterior transverse carina complete, indented centrally, touching the kidney-shaped spiracles; pleural carina complete; lateral longitudinal carina conspicuous posterior to the anterior transverse carina; posterior transverse carina centrally absent; area lateralis enclosed. Hind coxa 0.7× as long as femur. Fore wing 4.3 mm long; crossvein 1cu-a opposite to M&Rs; postnervulus intercepted at middle, slightly arched anteriorly; M between 2rs-m and 2m-cu 2× as long as M between 2m-cu and 3rs-m. Hind wing 2.9 mm long, with 4 basal hamuli on tubular vein C, and 7 distal hamuli on vein RA, forming a proximal cluster with the first 3 hamuli and with the others equally distributed; brachiella virtually absent; discoidella, cubitella and radiella spectral; nervellus with CU 0.6x as long as cu-a.

Metasoma. Tergite I 1.35 mm long, about 0.65× as long as mesosoma, curved upwards posterior to 0.6 of its length, with spiracle on 0.4 of its length. Exposed portion of ovipositor 2.85 mm, about 1.95× as long as hind tibia.

Coloration. Body mostly pale yellow; apex of mandibles black; occiput, transversal strip crossing lateral ocelli, and triangular spot between median ocellus and toruli dark brown; antenna darkening towards apex; dark brown stripe under subalar prominence; mesoscutum brownish, darkening anteriorly; fifth tarsomeres brownish, darkening from fore leg to hind leg; apex of tarsal claws dark brown; ovipositor sheath dark brown; ovipositor brownish, the dorsal valve darkening towards apex; wings hyaline, with veins dark brown and pterostigma light brown translucent.

Remarks. Grotea fernandoi sp. n. can be easily distinguished from all Grotea species by lack of three features commonly used to identify the genus: head subglobose (vs. eyes and face narrow and high with long malar space in G. fernandoi ); gena projected into a lobe close to junction of occipital and hypostomal carinae (vs. absent in G. fernandoi ); and epicnemial carina ending at lower corner of pronotum (vs. reaching a third of the height of the posterior corner of the pronotum in G. fernandoi ).

Male. Unknown.

Etymology. The species is named after the late Fernando Amaral da Silveira, who was a dear friend and great entomologist, bee specialist.

Distribution. Southeastern Brazil, Minas Gerais state.

Material examined. Holotype (♀). Brazil, Minas Gerais, Mariana, 20°16’24”S; 43°18’35”W, 30.iii‒ 03.iv.2019, Malaise. Bruna Karen Pinheiro Costa leg. [1 ♀, CCT-UFMG-IHY-2202827 ]

Holotype condition. In good condition.

Figures

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.