Enicospilus bulbipennis, 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 : 34-37

Enicospilus bulbipennis sp. nov.

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Fig. 15

Diagnosis

Interocellar area reddish brown; clypeus convex, ventral margin blunt; mandible twisted ca 30°, outer surface without a diagonal setose groove; fore wing fenestra with proximal, central and distal sclerites present, central sclerite close to distal sclerite, elongate oval, basal, discosubmarginal and marginal cells with short and sparse setae, vein 2r&RS with posterior bulb; mesoscutum with three black stripes.

Differential diagnosis

The new species can be distinguished from E. rhetus Gauld & Mitchell, 1981 by its mesoscutum with three black stripes, central sclerite elongate oval, close and parallel to distal sclerite.

Etymology

The specific epithet ‘ bulbipennis ʼ means ‘with a bulb on the wingʼ, referring to the posterior bulb on the fore wing vein 2r&RS.

Material examined

Holotype

VIETNAM • ♀; Quang Nam Province, Bac Tra My, Tra Doc ; 15°25′47″ N, 108°6′52″ E; 250 m a.s.l.; 16 Mar. 2020; Pham V.P. leg.; light trap; IEBR.

Description

Female (holotype)

MEASUREMENTS. Body length 16.7 mm, fore wing length 11.5 mm.

Head with FI = 0.7, GOI = 4.2 ( Fig. 15d ). Lower face 0.7× as wide as high, shiny ( Fig. 15b ). Clypeus 1.6 × as wide as high, similarly sculptured as face, convex in profile, ventral margin blunt ( Fig. 15b ). Malar space 0.2 × as long as basal mandibular width ( Fig. 15b ). Mandible twisted by ca 30°, moderately short, evenly narrowed, outer surface without diagonal setose groove ( Fig. 15b ). Upper tooth of mandible depressed, about 1.4 × as long as lower tooth ( Fig. 15b ). Frons and vertex shiny, vertex with sparse setae ( Fig. 15c ). Gena moderately shiny, with dense fine setae ( Fig. 15d ). Posterior ocellus close to eye ( Fig. 15c ). Occipital carina complete, ventral end meeting hypostomal carina at about 0.7× basal mandible width from base of mandible. Antenna with 48 flagellomeres; F1 1.6× as long as F2; F20 2.0× as long as wide.

MESOSOMA. Moderately shiny ( Fig. 15e ). Pronotum coriaceous ( Fig. 15e ). Mesoscutum 1.4× as long as maximum width, evenly rounded in profile. Notaulus absent. Scutellum moderately convex, punctate anteriorly, with fine rugae posteriorly, lateral longitudinal carinae present along entire length of scutellum. Epicnemium densely punctate ( Fig. 15e ). Epicnemial carina moderately weak, present on ventral half of mesopleuron, dorsal end bent towards anterior margin of mesopleuron ( Fig. 15e ). Mesopleuron densely punctate, ventrally puncto-striate ( Fig. 15e ). Submetapleural carina broadened anteriorly ( Fig. 15e ). Metapleuron densely striate ( Fig. 15e ). Propodeum evenly rounded in profile; anterior transverse carina complete; anterior area coriaceous; spiracular area smooth; posterior area concentrically striate; propodeal spiracle elliptical and joining pleural carina by ridge.

WINGS ( Fig. 15f ). Fore wing with AI = 0.96, CI = 0.26, DI = 0.27, ICI = 0.39, SDI = 1.26, SI = 0.16, SRI = 0.21; vein 1m-cu&M evenly arcuate; vein 2r&RS relatively straight, with posterior bulb at about distal 0.4; vein RS strongly curved; fenestra and sclerites of discosubmarginal cell as in Fig. 15f ; proximal sclerite strong, triangle, distal sclerite thick, moderately strong, connection between proximal and distal sclerites narrow and weakly pigmented; central sclerite strongly pigmented, more or less elongate, positioned closer to distal sclerite than to vein 2r&RS; proximal corner of marginal cell with sparse setae; posterodistal corner of second discal cell and that of subbasal cell ca 70°; vein 1cu-a sub-interstitial to M&RS. Hind wing with NI = 3.9; vein RS weakly curved; vein RA with 6 uniform hamuli.

LEGS. Hind leg with coxa in profile 1.7× as long as high; basitarsus 1.6× as long as second tarsomere; fourth tarsomere 2.7× as long as wide; tarsal claws simply pectinate.

METASOMA. With DMI = 1.4, PI = 2.5, THI = 3.4; thyridium oval; ovipositor sheath not longer than posterior height of metasoma.

Colour ( Fig. 15a ). Reddish brown except for apex of mandible, three longitudinal stripes on mesoscutum and a black spot in front of scutellar groove, metasoma from T5 onwards black. Wings hyaline; sclerites light brown to amber; veins reddish brown to dark brown, pterostigma reddish brown.

Variation in female

Unknown.

Male

Unknown.

Distribution

Currently known only from Quang Nam Province, Central Vietnam.

Figures

Fig. 15. Enicospilus bulbipennis 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.