Enicospilus matsumurai 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 matsumurai Shimizu sp. nov. Figure 27

Etymology.

The specific name is derived from one of the greatest Japanese entomologists, Shônen Matsumura.

Type series.

Total of 12 specimens (8♀♀4♂♂): Japan (8♀♀4♂♂).

HT: ♀, Mt. Hikosan, Fukuoka Pref., Kyûshû, JAPAN, 22.IX.1983, M.T. Chûjô leg. (LT) (NIAES).

PT: 1♀, Tarumi, Matsuyama, Ehime Pref., Shikoku, JAPAN, 18.IX.1948, M. Miyatake leg. (EUM); 3♀♀, Matsuyama, Ehime Pref., Shikoku, JAPAN, 18.X.1954 (1♀), 19.X.1954 (1♀), 26.XI.1954 (1♀), S. Ueda leg. (EUM); 1♂, Matsuyama, Ehime Pref., Shikoku, JAPAN, 13.I.1952, T. Ishikawa leg. (EUM); 1♀, Teragawa, Hongawa, Kôchi Pref., Shikoku, JAPAN, 22.VII.1989, I. Yamashita leg. (LT) (NIAES); 1♀, Jigokudani, Kôchi City, Kôchi Pref., Shikoku, JAPAN, 7.VIII.1992, I. Yamashita leg. (LT) (NIAES);1♀, Kôchi Pref., Shikoku, JAPAN (MNHA); 1♂, Mt. Hikosan, Fukuoka Pref., Kyûshû, JAPAN, 11.X.1980, K. Konishi leg. (LT) (NIAES); 1♂, Nagasaki Pref., Kyûshû, JAPAN, V.1935 (NIAES-TIC); 1♂, Mt. Kurodake, Mts. Kujû, Ōita Pref., Kyûshû, JAPAN, 3.X.1983, N. Koda & R. Noda leg. (LT) (NIAES).

Distribution.

Eastern Palaearctic region.

JAPAN: [Shikoku] Ehime and Kôchi; [ Kyûshû] Fukuoka, Nagasaki and Ōita.

Bionomics.

Unknown.

Differential diagnosis.

This species is similar to E. flavicaput and some of the type series were misidentified as that species, but E. matsumurai sp. nov. is distinguishable from E. flavicaput by the shape and position of the central sclerite of the fore wing fenestra (Fig. 27F ), sculpture of the mesosoma (Fig. 27E ), and wing venation (Fig. 27F ). This species also resembles E. kunigamiensis sp. nov. but is distinguishable by several characters (cf. 'Differential diagnosis’ under E. kunigamiensis sp. nov.). In addition, the large size of this species is also a useful diagnostic character.

Description.

Female (n = 8). Body length 28.0-30.5 (HT: ca. 30.5) mm.

Head with GOI = 2.5-2.9 (HT: 2.8) (Fig. 27D ). Lower face 0.7 × as wide as high, strongly shiny, finely punctate with setae (Fig. 27B ). Clypeus 1.3-1.5 × (HT: 1.5) as wide as high, sparsely finely punctate with setae, very weakly convex but almost flat in profile, and ventral margin subacute (Fig. 27B, D ). Malar space 0.2 × as long as basal mandibular width (Fig. 27B, D ). Mandible moderately twisted by 50-55° (HT: ca. 50°), moderately long, evenly narrowed, outer surface smooth (Fig. 27B, D ). Upper tooth of mandible 1.3-1.4 × (HT: 1.4) as long as lower (Fig. 27B ). Frons, vertex and gena strongly shiny with fine setae. Posterior ocellus touching eye (Fig. 27B-D ). Ventral end of occipital carina joining oral carina. Antennae with 59-60 (HT: 60) flagellomeres; first flagellomere 2.0 × as long as second; 20th flagellomere 1.7-1.8 × (HT: 1.7) as long as wide.

Mesosoma entirely weakly to moderately shiny with setae (Fig. 27E ). Pronotum diagonally striate (Fig. 27E ). Mesoscutum 1.4 × as long as maximum width, moderately shiny and finely punctate to smooth with setae, and evenly rounded in profile (Fig. 27E ). Notauli absent (Fig. 27E ). Scutellum moderately convex, smooth, with lateral longitudinal carinae along anterior 0.8-1.0 of scutellum. Epicnemium densely punctate with setae. Epicnemial carina strong, straight, strongly inclined to anterior, dorsal end not reaching anterior margin of mesopleuron (Fig. 27E ). Mesopleuron entirely longitudinally striate (Fig. 27E ). Submetapleural carina broadened anteriorly (Fig. 27E ). Metapleuron densely punctate with rather coarse diagonal striae (Fig. 27E ). Propodeum evenly rounded in profile; anterior transverse carina complete; anterior area longitudinally striate; spiracular area smooth; posterior area coarsely rugose; propodeal spiracle elliptical and not joining pleural carina by ridge (Fig. 27E ).

Wings (Fig. 27F ). Fore wing length 19.5-21.5 (HT: ca. 21.0) mm with AI = 0.7-0.8 (HT: 0.8), CI = 0.2-0.3 (HT: 0.2), DI = 0.3, ICI = 0.7-0.8 (HT: 0.8), SDI = 1.2-1.3 (HT: 1.3), SI = 0.1, SRI = 0.2; vein 1m-cu&M slightly sinuous; vein 2r&RS slightly sinuous and angulate; vein RS evenly curved; fenestra and sclerites of discosubmarginal cell as in Fig. 27F ; proximal sclerite subquadrate, not confluent with distal sclerite, strongly pigmented; central sclerite linear and rather weakly pigmented, subparallel to 2r&RS, positioned in anterodistal part of fenestra; distal sclerite vestigial or absent; proximal corner of marginal cell evenly setose; posterodistal corner of second discal cell 100-110° (HT: ca. 110°) and of subbasal cell 80-85° (HT: ca. 85°); vein 1cu-a antefurcal to M&RS by 0.2 × length of 1cu-a. Hind wing with NI = 2.6-2.9 (HT: 2.6); vein RS basally slightly bowed and slightly evenly curved; vein RA with 8-9 (HT: 9) uniform hamuli.

Legs. Hind leg with coxa in profile 1.7-1.8 × (HT: 1.7) as long as deep; basitarsus 1.8-1.9 × (HT: 1.9) as long as second tarsomere; fourth tarsomere 2.8-3.3 × (HT: 2.8) as long as wide; tarsal claw simply pectinate.

Metasoma with DMI = 1.3-1.4 (HT: 1.4), PI = 3.1-3.5 (HT: 3.1), THI = 4.3-4.7 (HT: 4.7); thyridium oval, rather small, not strongly impressed; ovipositor sheath not longer than posterior depth of metasoma (Fig. 27A ).

Colour (Fig. 27 ). Entirely red-brown except for apex of mandible black. Wings weakly infuscate; sclerites pigmented and amber; veins red-brown.

Male (n = 4). Very similar to female except body length 22.0-30.5 mm; antennae with 55-63 flagellomeres.

Figures

Figure 27. Enicospilus matsumurai 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.