Enicospilus trui, 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 : 132-136

Enicospilus trui sp. nov.

urn:lsid:zoobank.org:act:3A00D90F-B5FE-4F5E-A79C-C22F107FFB3A

Fig. 78

Diagnosis

Interocellar area black; clypeus convex, ventral margin impressed, acute; mandible twisted ca 20°, outer surface without a diagonal setose groove; fore wing fenestra with proximal and distal sclerites, both strongly pigmented, proximal sclerite more or less crescentic and distal sclerite linear; hind tarsal claws with distal pecten projecting beyond apical tooth.

Differential diagnosis

The new species can be distinguished from E. bakerielli Gauld & Mitchell, 1981 by its outer surface of mandible without a diagonal setose groove or tuft of long setae; and by its fore wing fenestra without any darkened patches between proximal and distal sclerites. The new species can be recognized from E. circuliscleritalis sp. nov. by its smaller proximal sclerite and greater DMI (1.3–1.4 vs 1.2).

Etymology

Named after Mr Hoang Vu Tru, an entomologist from IEBR who collected the type specimens of the new species.

Material examined

Holotype

VIETNAM • ♂; Lam Dong Province, Bidoup - Nui Ba NP ; 3 Jun. 2013; Hoang V.T. leg; light trap; IEBR.

Paratype

VIETNAM • 1 ♀; Dong Nai Province, Vinh Cuu, Phu Ly ; 1 Aug. 2008; Hoang V.T. leg; light trap; IEBR.

Description

Male (holotype)

MEASUREMENTS. Body length 14.1 mm, fore wing length 10.5 mm.

HEAD with FI = 0.5, GOI = 3.7 ( Fig. 78d ). Lower face 0.7 × as wide as high, shiny, finely punctate ( Fig. 78b ). Clypeus 1.4 × as wide as high, similarly sculptured as face, convex in profile, ventral margin impressed, acute ( Fig. 78b ). Malar space 0.3× as long as basal mandibular width ( Fig. 78b ). Mandible twisted by ca 20°, outer surface without diagonal setose groove ( Fig. 78b ). Upper tooth of mandible about 1.4× as long as lower tooth ( Fig. 78b ). Frons and vertex smooth ( Fig. 78c ). Gena moderately shiny, with dense, fine setae ( Fig. 78d ). Posterior ocellus close to eye ( Fig. 78c ). Occipital carina complete, ventral end meeting hypostomal carina at about 1.0 × basal mandible width from base of mandible. Antenna broken, with 31 remaining flagellomeres; F1 2.0 × as long as F2; F20 2.2× as long as wide.

MESOSOMA. Moderately shiny ( Fig. 78e ). Pronotum coriaceous ( Fig. 78e ). Mesoscutum 1.4× as long as maximum width, evenly rounded in profile. Notauli absent. Scutellum moderately convex, finely punctate, lateral longitudinal carinae present along entire length of scutellum. Epicnemium densely punctate ( Fig. 78e ). Epicnemial carina moderately strong, present on ventral 0.7 of mesopleuron, dorsal end bent to reach anterior margin of mesopleuron ( Fig. 78e ). Mesopleuron moderately shiny, densely striate ( Fig. 78e ). Submetapleural carina broadened anteriorly ( Fig. 78e ). Metapleuron matt, with irregular wrinkles ( Fig. 78e ). Propodeum evenly rounded in profile; anterior transverse carina complete; anterior area coriaceous, with several rugae; spiracular area smooth; posterior area rugose; propodeal spiracle elliptical and joining pleural carina by weak ridge ( Fig. 78e ).

WINGS ( Fig. 78f ). Fore wing with AI = 1.6, CI = 0.23, DI = 0.49, ICI = 0.31, SDI = 0.7, SI = 0.2, SRI = 0.49; vein 1m-cu&M evenly arcuate; vein 2r&RS thick and strongly sinuous proximally, abruptly narrowed and straight distally; vein RS strongly curved; fenestra and sclerites of discosubmarginal cell as in Fig. 78f ; proximal sclerite strong, more or less crescentic, distal sclerite thick, linear, distal end close to angulation at distal 0.3 of vein 2r&RS; proximal corner of marginal cell evenly setose; posterodistal corner of second discal cell ca 75° and that of subbasal cell ca 45°; vein 1cu-a interstitial to M&RS. Hind wing with NI = 2.4; vein RS weakly curved; vein RA with 5 uniform hamuli on right wing and with 6 hamuli on left wing.

LEGS. Hind leg with coxa in profile 1.7× as long as high; basitarsus 1.7× as long as second tarsomere; fourth tarsomere 2.0× as long as wide; tarsal claws with distal pecten projecting beyond apical tooth.

METASOMA. With DMI = 1.3, PI = 3.6, THI = 4.2; thyridium oval; S4–7 with long stout erect setae on posterior margins.

COLOUR ( Fig. 78a ). Reddish brown with black markings as follow: apex of mandible, face and frons medially, interocellar area, mesosoma (except prothorax), metasoma from T4 onwards (except anterior 0.5 of T4 dorsally). Wings hyaline with an darkened area at proximal corner of marginal cell, sclerites dark brown, veins brown to dark brown, pterostigma black.

Female

Similar to male except following: antenna (unbroken) with 59 flagellomeres; fore wing length 11.2 mm, AI = 1.2, CI = 0.32, ICI = 0.31, SI = 0.15; metasoma with DMI = 1.4, ovipositor sheath not longer than posterior height of metasoma.

Distribution

Currently known only from Lam Dong Province (the Central Highland of Vietnam) and Dong Nai Province (South Vietnam).

Figures

Fig. 78. Enicospilus trui 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.