Enicospilus sakaguchii (Matsumura & Uchida, 1926)

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 sakaguchii (Matsumura & Uchida, 1926) Figure 41

Henicospilus sakaguchii Matsumura and Uchida, 1926: 73; HT ♂ from Ryûkyûs, SEHU, examined.

Enicospilus iracundus Chiu, 1954: 17; HT ♂ from Ryûkyûs, TARI, examined; syn. nov.

Specimens examined.

Total of 141 specimens (94♀♀29♂♂ and 18 unsexed): Japan (45♀♀13♂♂), Taiwan (49♀♀16♂♂ and 18 unsexed).

Type series: HT ♂ of Henicospilus sakaguchii Matsumura & Uchida, 1926, Okinawa, Ryûkyûs, JAPAN, S. Sakaguchi leg. (SEHU); HT ♂ of Enicospilus iracundus Chiu, 1954, Okinawa, Ryûkyûs, JAPAN, 1922, J. Sonan (TARI).

Distribution.

Eastern Palaearctic and Oriental regions ( Yu et al. 2016); this is a predominantly Oriental species.

Newly recorded from Indonesia.

JAPAN: [ Tôhoku] Aomori*; [ Kantô-Kôshin] Tochigi* and Kanagawa*; [ Tôkai] Shizuoka*; [ Kyûshû] Kagoshima ( Nagatomi et al. 1972); [ Ryûkyûs] Kagoshima ( Kusigemati 1972; Nagatomi et al. 1972; present study) and Okinawa ( Matsumura and Uchida 1926; Uchida 1928; Chiu 1954; present study). *New records.

Bionomics.

Reared from two species of Noctuidae in Japan: Sesamia turpis (Butler) ( Kusigemati 1972; Nagatomi et al. 1972) and S. inferens (Walker) (e.g., Uchida 1928, 1930; Sonan 1944; Nagatomi et al. 1972; Momoi and Watanabe 1975). This species is frequently collected in sugar cane fields where it is a parasitoid of Sesamia Guenée species ( Moutia 1934; Nagatomi et al. 1972).

Differential diagnosis.

This species is very easily distinguished from all other species of Enicospilus by the shape of the clypeus (flat and projecting, with a distinct gap between clypeus and mandibles in profile, as in Fig. 41B, D ), mandible (short and stout, as in Fig. 41B, D ), and fore wing sclerites (Fig. 41F ).

Remarks.

We could find no morphological differences between E. sakaguchii and E. iracundus syn. nov., except the faint presence or absence of the central sclerite. Hence, E. iracundus syn. nov. is newly synonymised with E. sakaguchii .

Figures

Figure 41. Enicospilus sakaguchii (Matsumura & Uchida, 1926) ♀ 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.