Enicospilus takakuwai Shimizu, 2020

Shimizu, So, Broad, Gavin R. & Maeto, Kaoru, 2020, Integrative taxonomy and analysis of species richness patterns of nocturnal Darwin wasps of the genus Enicospilus Stephens (Hymenoptera, Ichneumonidae, Ophioninae) in Japan, ZooKeys 990, pp. 1-144 : 1

Enicospilus takakuwai Shimizu sp. nov. Figure 48

Etymology.

The specific name is derived from the name of the collector of the holotype specimen, a famous Japanese insect taxonomist, Masatoshi Takakuwa.

Type series.

A holotype male only.

HT: ♂, Tairoike, Miyake-jima, Izu Iss., Tôkyô, Kantô-Kôshin, JAPAN, 10-11.VI.2010, M. Takakuwa leg. (KPMNH).

Distribution.

Eastern Palaearctic region.

JAPAN: [ Kantô-Kôshin] Tôkyô (Miyake-jima Island).

Bionomics.

Unknown.

Differential diagnosis.

This species is more or less similar to E. laqueatus , but easily distinguished by the position and shape of the central sclerite: central sclerite positioned in the anterodistal part of the fenestra, smaller and moderately sclerotised in E. takakuwai sp. nov., as in Fig. 48F , but positioned in the centrodistal part of the fenestra, larger and strongly sclerotised in E. laqueatus , as in Fig. 24F .

Description.

Male (HT). Body length ca. 16.5 mm.

Head with GOI = 3.2 (Fig. 48D ). Lower face 0.8 × as wide as high, strongly shiny, finely punctate with setae (Fig. 48B, D ). Clypeus 1.5 × as wide as high, finely punctate with setae, convex in profile, and ventral margin acute (Fig. 48B, D ). Malar space 0.4 × as long as basal mandibular width (Fig. 48B, D ). Mandible moderately twisted by 15°, moderately long, evenly narrowed, outer surface with diagonal setose groove (Fig. 48B, D ). Upper tooth of mandible 1.4 × as long as lower (Fig. 48B ). Frons, vertex and gena strongly shiny with fine setae (Fig. 48B-D ). Posterior ocellus touching eye (Fig. 48B-D ). Ventral end of occipital carina joining oral carina. Antennae with 59 flagellomeres; first flagellomere 1.8 × as long as second; 20th flagellomere 2.1 × as long as wide.

Mesosoma entirely rather weakly shiny with fine setae (Fig. 48E ). Pronotum fairly extensively diagonally striate (Fig. 48E ). Mesoscutum 1.5 × as long as maximum width, finely punctate, and evenly rounded in profile (Fig. 48E ). Notauli absent (Fig. 48E ). Scutellum with lateral longitudinal carinae along entire length of scutellum. Epicnemium punctate with setae. Epicnemial carina strong, almost straight, inclined to anterior, dorsal end not reaching anterior margin of mesopleuron (Fig. 48E ). Meso- and metapleuron evenly moderately longitudinally striate (Fig. 48E ). Submetapleural carina broadened anteriorly (Fig. 48E ). Propodeum declivous in profile; anterior transverse carina complete; anterior area longitudinally striate; spiracular area smooth; posterior area entirely moderately reticulate; propodeal spiracle elliptical and joining pleural carina by ridge (Fig. 48E ).

Wings (Fig. 48F ). Fore wing length ca. 11.0 mm with AI = 0.4, CI = 0.4, DI = 0.3, ICI = 0.5, SDI = 1.3, SI = 0.1, SRI = 0.3; vein 1m-cu&M evenly weakly curved; vein 2r&RS almost straight; vein RS evenly curved; fenestra and sclerites of discosubmarginal cell as in Fig. 48F ; proximal sclerite triangular, not confluent with distal sclerite, strongly pigmented; central sclerite D-shaped, moderately sclerotised, and positioned in anterodistal part of fenestra; distal sclerite weakly pigmented; proximal corner of marginal cell rather sparsely setose, but without glabrous area; posterodistal corner of second discal cell ca. 100° and of subbasal cell ca. 90°; vein 1cu-a antefurcal to M&RS by 0.2 × length of 1cu-a. Hind wing with NI = 2.3; vein RS straight; vein RA with 7 uniform hamuli.

Legs. Hind leg with coxa in profile 1.7 × as long as deep; basitarsus 1.9 × as long as second tarsomere; fourth tarsomere 3.3 × as long as wide; tarsal claw simply pectinate.

Metasoma with DMI = 1.4, PI = 3.3, THI = 4.5; thyridium oval.

Colour (Fig. 48 ). Head and mesosoma entirely yellow-brown except for apex of mandible black. Metasoma dark brown. Wings hyaline. Fore wing sclerites pigmented and amber. Wing veins red-brown to amber.

Female. Unknown.

Figures

Figure 24. Enicospilus laqueatus (Enderlein, 1921) ♀ from Japan A habitus B head, frontal view C head, dorsal view D head, lateral view E mesosoma, lateral view F central part of fore wing.

Figure 48. Enicospilus takakuwai Shimizu, sp. nov. ♂ (HT) from Japan A habitus B head, frontal view C head, dorsal view D head, lateral view E mesosoma, lateral view F central part of fore wing.