Diplazon scutatorius Teunissen 1943

Klopfstein, Seraina, 2014, Revision of the Western Palaearctic Diplazontinae (Hymenoptera, Ichneumonidae), Zootaxa 3801 (1), pp. 1-143 : 45-46

Diplazon scutatorius Teunissen 1943

Diplazon pilosus Uchida 1957 Diplazon tetragonopsis Uchida 1957

Diagnosis. Fore wing length 3.9–5.2 mm. Antenna of both sexes with 16–17 flagellomeres. Face with punctures clearly distinct from the background sculpture. Mesopleuron smooth and polished weakly punctate largely restricted to lower half. Propodeum with a full set of carinae enclosing basal, lateral and petiolar areas. Tergite 1 0.9–1.1 times as long as wide in females, 1.0– 1.4 in males, tergite 2 0.55–0.7 in females and 0.6–0.8 in males; tergites 2 and 3 with large, distinct punctures on a smooth and polished background, on tergite 2 sometimes slightly more rugose, but punctures always with distinct margins. Transverse impressions deep on tergites 1 to 4. Metasoma dorsoventrally depressed.

Colouration of females. Antenna dark brown, sometimes paler below. Head and mesosoma black, face with yellow along inner orbits, without yellow central face patch, yellow on clypeus and mouthparts, hind corner of pronotum, tegula, subtegular ridge, shoulder mark, upper mesepimeron; scutellum largely yellow. Legs orange, fore and mid coxae entirely yellow, hind coxa orange; femora orange; hind tibia black-white-black banded, hind tarsus dark. Metasoma black, often with yellow spots on apical corners of tergites 2 and sometimes 3.

Colouration of males. As in females but with yellow ventrally on scape and pedicel and often entire antenna, entire face, propleuron, epicnemium and part of mesosternum. Hind coxa usually yellow. Metasoma often marked with yellow stripes behind transverse impressions on tergites 2 to 3 or 4.

Material examined. Holotype ♀ of Diplazon tetragonopsis Uchida : Japan, Izu-Ôshima, 25.V.1953, leg. S. Momoi, 1♀, at SPRHU.

New for Denmark: Sonderlylland, Stensbaek Plantage, leg. Worn-Hansen, 10.VII.1950. 1♀, at ZMUC . New for Hungary: Gemenci erdő, leg. Bajári, 21.V.1959. 1♀, at TMA . New for North Korea: Prov. North Pyongan, Mt. Myhyang-san, leg. Forro & Topal, 15.IX.1980. 1♀, at TMA . New for South Korea: Prov. Kanwon, Kum-gang san, environs. of Hotel Go-song, leg. S.Mahunka & H.Steinmann, 29.V.1970. 1♀, at TMA.

Denmark (1), Finland (5), France (1), Germany (2), Hungary (7), North Korea (2), Norway (1), Russia (1), Sweden (90), Switzerland (70), United Kingdom (50).

Distribution. Palaearctic.

Figures. Metasoma ♀ ( Fig. 7 A, 18B), face ♀ ( Fig. 7 G), propodeum ( Figs 9 A, 9B), habitus ( Fig. 29 E), male terminal sclerites ( Fig. 37 C).

Notes. Diplazon tetragonopsis Uchida has variously been synonymized with D. tetragonus or D. scutatorius in the past. I here confirm Diller’s (1982) interpretation of the type of D. tetragonopsis .

Figures

FIGURE 7. Macro- and microsculpture of diplazontine metasomas and faces. A – D: tergites 1 – 3 of the metasoma. A. Diplazon scutatorius, smooth and shining between the strong and dense punctures. B. Diplazon tetragonus, with partly rugulous sculputure basally on tergite 2, and coriaceous sculpture on tergite 3, both tergites bearing weak punctures on a smooth background behind the strong transverse impressions. C. Tymmophorus obscuripes, with rugose sculpture on tergites 1 and 2, becoming more coriaceous on tergite 3. D. Woldstedtius holarcticus, with coriaceous tergites and striae basally on tergite 2. E – H: faces showing sculpture and shape of clypeus. E. Sussaba flavipes, with a face that is coriaceous only on the middle elevation. F. Woldstedtius holarcticus. G. Diplazon scutatorius. H. Homotropus signatus. F. – H. all with strongly coriaceous and matt sculpture. Scale bars represent 500 µm.

FIGURE 9. Propodeum of diplazontine species. A. propodeum of Diplazon scutatorius with areas and carinae as termed by Townes (1965) marked. ba = basal area, pa = petiolar area (fused with areola, see 9 C), la 1 = first lateral area, la 2 = second lateral area, pla 12 = fused first and second pleural areas, pla 3 = third pleural area, mp = mesopleuron, 1 = transverse carina, 2 = median longitudinal carina, 3 = lateral longitudinal carina, 4 = pleural carina. B. same as A, but viewed laterally. C. Propodeum of Tymmophorus obscuripes with full carination and even an indication of the areola between the basal and petiolar areas. D. Propodeum of Homotropus signatus with carinae partly reduced but with the posterior ends of median and lateral longitudinal carinae present and transverse carina indicated by rugae. E. Propodeum of Woldstedtius holarcticus with carinae completely reduced. Scale bars represent 500 µm.

FIGURE 29. Habitus of Diplazon species. A. Diplazon laetatorius. B. Diplazon nordicus sp. nov. C. Diplazon parvus sp. nov. D. Diplazon pectoratorius. E. Diplazon scutatorius. E. Diplazon varicoxa.

FIGURE 37. Ninth sternite and ninth and tenth tergites of male Diplazontinae species. A. Daschia brevitarsis. B. Diplazon angustus. C. Diplazon scutatorius. D. Diplazon zetteli. E. Enizemum ornatum. F. Homotropus dimidiatus. G. Homotropus longiventris. H. Homotropus melanogaster. I. Homotropus nigrolineatus. J. Phthorima xanthaspis.