Coelichneumon clypeatus
Creators: name: Riedel, Matthias
name: Watanabe, Kyohei
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Coelichneumon
Coelichneumon clypeatus

description: Coelichneumon clypeatus (Uchida, 1955)
Protichneumon clypeatus Uchida, 1955: 97, ♀.
Holotype: ♀ “[Syoyozan], 1941 VI. 15 ” (Sapporo), type studied. Missing: 4 th and 5 th right mid tarsomeres, 5 th left mid tarsomere, left flagellomeres from 5 th on. Right hind leg and right antenna glued on card.
Non-type material: 1 ♀, Hokkaido, Biei Town, Chubetsu, 7.vii.1980, K. Maeto leg. (NIEAS); 1 ♀, Hokkaido, Otaru City, Mt. Kenashi, 9–10.vii.2002, A. Yamamoto leg. (Kanagawa).
Description: ♀: Body length 15 mm. Flagellum with 42 flagellomeres, moderately lanceolate, 1 st flagellomere 1.6× longer than wide; 2 nd flagellomere 1.4× longer than wide, combined length 0.49× eye length; 7 th flagellomere square, widest flagellomeres c.2.0× wider than long. Temple moderately and roundly narrowed behind eye. OED 1.25× ocellar diameter. Frons finely rugose-punctate. Face densely punctate, centrally rugose. Clypeus with dense punctures, smooth. Gena with dense punctures ventrally, 1.1× wider than eye. MI 0.7.
Mesosoma covered with brownish hairs. Mesoscutum with dense punctures, smooth between punctures. Mesopleuron punctate. Metapleuron punctate; juxtacoxal carina present. Scutellum slightly elevated, about as long as wide, with dense punctures, without lateral carina. Area superomedia heart-shaped, slightly longer than wide; anterior transversal carina absent. Area externa punctate, finely granulate. Hind coxa densely punctate, densely pilose, without scopa. Hind femur densely punctate, 3.2× longer than wide; 3 rd mid tarsomere 1.5× longer than wide. Areolet pentagonal, frontal distance between veins 2rs-m and 3rs-m 2× their width; vein 2m-cu slightly distad its middle. Vein 1cu-a postfurcal by 1× its width.
Lateral field of postpetiolus punctate, 0.35× as wide as median field, median field rugose-punctate, indistinctly striate. Gastrocoelus large, with ridges; thyridium slightly oblique, 0.8× as wide as the interval. 2 nd tergite 1.25× wider than long. 2 nd and 3 rd tergites very finely and densely rugose-punctate, area between thyridia with weak striation. 7 th tergite 1.2× wider than long. Seen from dorsal, ovipositor sheath c.0.6× as long as 7 th tergite.
Color: Black. Ivory are flagellomeres 8–12 and narrow frontal orbit. Mandible reddish centrally. 1 st tergite except narrow black base and 2 nd and 3 rd tergites red. Legs blackish; tibiae and tarsi reddish; hind tibia infuscate in apical 0.2; 4 th and 5 th hind tarsomeres ± infuscate. Wings with slightly brownish tint; pterostigma ochreous. ♂ unknown.
Remarks: This species resembles Coelichneumon haemorrhoidalis (Gravenhorst, 1820) which has also been reported from the Eastern Palaearctic region (Riedel 2012), but differs by its less strongly lanceolate flagellum, slightly slenderer basal flagellomeres, reduced striation on postpetiolus and 2 nd tergite, mainly red 1 st tergite and brownish instead of pale hairs on mesosoma. From the European Coelichneumon torsor (Thunberg, 1822), it can be differentiated by its less strongly lanceolate flagellum, black apical tergites and reduced striation on postpetiolus and 2 nd tergite. It is not impossible that Coelichneumon clypeatus represents a Japanese subspecies or form of one of these taxa. This is the first record of this species from Japan.
Distribution: Japan (Hokkaido) and Korea.
description: Published as part of Riedel, Matthias & Watanabe, Kyohei, 2021, The genus Coelichneumon Thomson in Japan (Hymenoptera, Ichneumonidae, Ichneumoninae), pp. 501-545 in Zootaxa 4948 (4) on pages 514-515, DOI: 10.11646/zootaxa.4948.4.2, http://zenodo.org/record/4629337