Enicospilus gialaiensis, Pham & Pham & Matsumoto & Shimizu & Broad, 2023

Pham, Nhi Thi, Pham, Phu Van, Matsumoto, Rikio, Shimizu, So & Broad, Gavin R., 2023, A review of the genus Enicospilus Stephens (Ichneumonidae: Ophioninae) from Vietnam, with descriptions of ten new species, European Journal of Taxonomy 873 (1), pp. 1-151 : 64-66

Enicospilus gialaiensis sp. nov.

urn:lsid:zoobank.org:act:96580CD1-745C-42A6-A21B-CB86D0ADE825

Fig. 33

Diagnosis

Interocellar area yellow; clypeus flat, ventral margin subblunt; mandible moderately stout, twisted ca 20°, outer surface without a diagonal setose groove; fore wing fenestra with proximal, central and distal sclerites, proximal sclerite large, triangular, connected to distal sclerite; S6–8 of male without long stout erect setae on posterior margins.

Differential diagnosis

The new species can be distinguished from E. selmatos Chiu, 1954 by the wider lower face (0.82× as wide as high vs 0.67–0.75×), the shape of fore wing fenestra sclerites, and the S6–8 of the male lacking long stout erect setae on posterior margins. The new species resembles to E. helena Gauld & Mitchell, 1981 in the shapes of the sclerites. It differs from the latter by its propodeum lacking any vestiges of the posterior transverse carina.

Etymology

Named after the type locality, Gia Lai Province.

Material examined

Holotype

VIETNAM • ♂; Gia Lai Province, Kon Ka Kinh NP ; 14.29675° N, 108.44949° E; 578 m a.s.l.; 28 Apr. 2022; Pham V.P. leg; light trap; IEBR.

Description

Male (holotype)

MEASUREMENTS. Body length 20.2 mm, fore wing length 13.7 mm.

HEAD with FI = 0.5, GOI = 2.0 ( Fig. 33d ). Lower face 0.82 × as wide as high, densely finely punctate ( Fig. 33b ). Clypeus 1.6 × as wide as high, flat in profile, finely punctate, ventral margin subblunt ( Fig. 33b ). Malar space 0.3 × as long as basal mandibular width ( Fig. 33b ). Mandible twisted by ca 20°, moderately stout, outer surface without diagonal setose groove ( Fig. 33b ). Upper tooth of mandible about 1.4 × as long as lower tooth ( Fig. 33b ). Frons and vertex shiny, with sparse setae ( Fig. 33c ). Gena moderately shiny, with dense, fine setae ( Fig. 33d ). Posterior ocellus close to eye ( Fig. 33c ). Occipital carina complete, ventral end meeting hypostomal carina at about 1.0 × basal mandible width from base of mandible. Antenna with 53 flagellomeres; F1 1.7 × as long as F2; F20 1.8× as long as wide.

MESOSOMA. Moderately shiny ( Fig. 33e ). Pronotum coriaceous ( Fig. 33e ). Mesoscutum 1.5× as long as maximum width, evenly rounded in profile. Notaulus absent. Scutellum moderately convex, punctate anteriorly, rugose posteriorly, lateral longitudinal carinae present along entire length of scutellum. Epicnemium matt, densely punctate ( Fig. 33e ). Epicnemial carina moderately strong, present on ventral half of mesopleuron, dorsal end bent towards anterior margin of mesopleuron ( Fig. 33e ). Mesopleuron puncto-striate ( Fig. 33e ). Submetapleural carina distinctly broadened anteriorly ( Fig. 33e ). Metapleuron coriaceous ( Fig. 33e ). Propodeum evenly rounded in profile; anterior transverse carina complete; anterior area with striations; spiracular area smooth; posterior area concentrically striate; propodeal spiracle elliptical and not joined to pleural carina by ridge ( Fig. 33e ).

WINGS ( Fig. 33f ). Fore wing with AI = 0.83, CI = 0.53, DI = 0.27, ICI = 0.54, SDI = 1.37, SI = 0.10, SRI = 0.24; vein 1m-cu&M evenly arcuate; vein 2r&RS weakly sinuous; vein RS strongly curved; fenestra and sclerites of discosubmarginal cell as in Fig. 33f ; proximal sclerite strongly pigmented, broadly triangular, 0.5 × as high as maximum width, distal sclerite connecting to proximal sclerite, central sclerite oval, positioned in centro-distal part of fenestra, proximal corner of marginal cell evenly setose; posterodistal corner of second discal cell ca 110° and that of subbasal cell ca 70°; vein 1cu-a slightly antefurcal to M&RS. Hind wing with NI = 2.9; vein RS relatively straight; vein RA with 6 uniform hamuli.

LEGS. Hind leg with coxa in profile 1.6× as long as high; basitarsus 1.6× as long as second tarsomere; fourth tarsomere 2.1× as long as wide; tarsal claws simply pectinate.

METASOMA. With DMI = 1.5, PI = 3.0, THI = 2.9; thyridium oval; sternites without long stout erect setae on posterior margins.

COLOUR ( Fig. 33a ). Reddish brown, metasoma from T3 onwards black. Wings hyaline, sclerites pigmented and amber, veins and pterostigma black.

Variation in male

Unknown.

Female

Unknown.

Distribution

Currently known only from Gia Lai Province, the Central Highlands of Vietnam.

Figures

Fig. 33. Enicospilus gialaiensis sp. nov., holotype, ♂ (IEBR). a. Habitus. b. Head, frontal view. c. Head, dorsal view. d. Head, lateral view. e. Mesosoma, lateral view. f. Central part of fore wing. Scale bars = 1.0 mm.