Eriastichus nexilis, Hansson, 2021

Hansson, Christer, 2021, The genus Eriastichus La Salle (Hymenoptera, Eulophidae, Tetrastichinae) in the Neotropical region, introducing 48 new species, ZooKeys 1019, pp. 35-91 : 35

Eriastichus nexilis sp. nov. Figure 41

Type locality.

Costa Rica, Heredia, Estación Biológica La Selva, 75 m, 10°26'N, 84°01'W, 28-29.ii.2008, J.S. Noyes leg.

Type specimen.

Holotype male dried and glued to a paper card. Original labels: "COSTA RICA, Heredia, E. La Selva, 75 m, 10°26'N, 84°01'W, 28-29.ii.2008, J.S. Noyes, NHM (Ent) 2010-21", "HOLOTYPE Eriastichus nexilis Hansson" [red printed label], (NHMUK014431055).

Additional type material.

Paratype 1♂ "Costa Rica, Cartago, Humo, El Copal, 9°47'N, 83°45'W, 1050-1250 m, 29.ii-6.iii.2008, C. Hansson" (MZLU:7041.2).

Diagnosis

(male). Head dark brown, scape pale brown, pedicel and flagellum brown; ventral plaque on scape ca. 0.2 × as long as scape (Fig. 41 ), antenna with dorsobasal setae on F1 0.9 × as long as F1; gaster with lateral tufts of pale and flattened setae on Gt6.

Description

(male holotype NHMUK014431055). Length of body 1.1 mm (paratype 1.2 mm). Head dark brown, scape pale brown, pedicel and flagellum brown, ventral plaque dark brown. Mesoscutum and mesoscutellum black with metallic tinges, dorsellum dark brown, propodeum black. Legs yellowish brown. Gaster dark brown.

Head. Length/width in frontal view 0.8; width/length in dorsal view 2.2; POL/OOL 2.0; WM/MS 1.6; MS/HE 0.5; HE/head length in frontal view 0.6; widths head/mesoscutum 1.1. Antenna. Pedicel + flagellum length/mesoscutum width 2.3; pedicel + flagellum length/head width 1.9; lengths scape/ventral plaque 4.2; ventral plaque located below the middle of scape; scape length/width 3.0; lengths scape/head (dorsal view) 0.5; scape length/HE 0.9; length/width F1, F2, F3, F4, clava: 3.3, 3.8, 3.5, 3.5, 8.5; length dorsobasal setae on F1/length F1 0.9. Mesosoma. Length/width 1.4; mesoscutum length/width 0.6; mesoscutellum length/width 0.8; widths SMG/SLG 1.1; enclosed space between SMG length/width 2.1; lengths mesoscutum/mesoscutellum 1.4; lengths mesoscutellum/dorsellum 3.2; lengths mesosoma/gaster 0.7. Wings. CC length/width 22.5; lengths CC/MV 1.1; lengths MV/ST 1.9; lengths MV/PM 4.0; lengths PM/ST 0.5; submarginal vein with six setae on dorsal surface (five setae in paratype). Gaster. With lateral tufts of pale and flattened setae on Gt6.

Figures

Figures 41 - 50. Eriastichus spp. head and antenna in lateral view, male holotypes 41 E. nexilis 42 E. oasis 43 E. ononis 44 E. novalis 45 E. nugalis 46 E. parabilis 47 E. rivalis 48 E. sodalis 49 E. orestis 50 E. pallidops.