Trychosis breviterebratus Watanabe 2020, sp. nov.
Creators: name: Watanabe, Kyohei
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Trychosis
Trychosis breviterebratus

description: Trychosis breviterebratus sp. nov.
(Figs 1 L-P, 2N, 3O, 14A-F)
(Standard Japanese name: Higejiro-marumune-togarihimebachi)
Type series. Holotype. KPM-NK 75748, F, JAPAN, Yamanashi Pref., Koushu City, Katsunuma-cho, Nr. Ootaki-fudou, 9. VII. 2007, K. Watanabe leg. Paratypes: JAPAN, NIAES, F, Iwate Pref., Mt. Hayachine, 2–8. VIII. 1989, M. Sharkey & H. Makihara leg. (MsT); NIAES, F, ditto, 8–15. VIII. 1989; KPM-NK 75766, F, Yamagata Pref., Mamurogawa-machi, 14. VII. 2012, Y. Matsubara & K. Fukuda leg. (MsT); KPM-NK 75767, 75768, 2 F, Fukushima Pref., Tajima Town, Tonyu, 3–7. VIII. 2003, A. Shimizu leg.; KPM-NK 75754, F, Tochigi Pref., Nasushiobara City, Ohsabigawa, 13. VIII. 2010, E. Katayama leg.; KPM-NK 75755, F, Tochigi Pref., Ohtawara City, Shimoishigami, 28. V. 2002, E. Katayama leg.; KPM-NK 75756, F, Tochigi Pref., Ohtawara City, Handa, 2. VI. 1999, E. Katayama leg.; KPM-NK 75753, F, Tochigi Pref., Kuroiso City, Shigiuchi, 25. VIII. 2001, E. Katayama leg.; KPM-NK 75758, F, Tochigi Pref., Kuroiso City, Momura, 4. VIII. 2000, E. Katayama leg.; KPM-NK 75762, F, Tochigi Pref., Ohtawara City, Ryujoh Park, 31. V. 2001, E. Katayama leg.; KPM-NK 75763, F, Tochigi Pref., Ohtawara City, Shimoishigami, 21. V. 2001, E. Katayama leg.; KPM-NK 75749, F, Kanagawa Pref., Yokosuka City, Ookusuyama, 18. VII. 2000, H. Nagase leg.; KPM-NK 75750, 75764, 2 F, Yamanashi Pref., Koushu City, Katsunuma-cho, Nr. Ootaki-fudou, 9. VII. 2007, T. Zakoji & K. Watanabe leg.; KPM-NK 75752, F, ditto, 4. VIII. 2008, K. Watanabe leg.; KPM-NK 75760, F, Niigata Pref., Nagaoka City, Suyoshi Town, Mt. Nokogiri-yama, 21. VIII. 2014, S. Shimizu & R. Shimizu leg.; KPM-NK 75751, F, Nagano Pref., Outaki Vil., Ontake-san, Hakkaisan, 7. VIII. 2010, K. Watanabe leg.; KPM-NK 75761, F, Nagano Pref., Ueda City, Sugadaira-kogen. Tsukuba Univ., 22. VII. – 8. VIII. 2014, S. Shimizu leg. (MsT); KPM-NK 75769, F, Nagano Pref., Karuizawa, 9. VIII. 1955, R. Ishikawa leg.; KPM-NK 75770, F, Toyama Pref., Toyama City, Kamegai, 28. VII. – 4. VIII. 2009, M. Watanabe et al. leg. (MsT); KPM-NK 75757, F, Fukui Pref., Natasho Vil., Mushi-dani, 7. VIII. 1981, T. Murota leg.; KPM-NK 75759, F, Fukui Pref., Uchitomihanto, 13. VII. 1980, H. Kurokawa leg.; KPM-NK 75765, F, Fukui Pref., Arashi, 22. VI. 1980, T. Tano leg.; NIAES, F, Ishikawa Pref., Tsurugi Town, Yahata, 11. VIII. 1992, I. Togashi leg.; NIAES, F, Oita Pref., Mt. Sobo, 14-20. VII. 1979, K. Konishi leg.; NIAES, F, Miyazaki Pref., Mt. Takachihonomine, 4. VIII. 1982, M. Takanashi leg.
Description. Female (n=28). Body polished, covered with brownish silver setae, length 8.0–11.5 (HT: 10.0) mm.
Head 0.5–0.53 (HT: 0.5) × as long as wide, punctate. Clypeus 0.5–0.56 (HT: 0.5) × as long as maximum wide, slightly convex in lateral view, its apical margin rounded, without a median tooth or convexity (Fig. 1L). A line drawn between the bottoms of the compound eyes at least cuts through the upper part of the clypeal bulge. Anterior tentrial pit apparently absent (Fig. 1L). Face 0.43–0.48 (HT: 0.45) × as long as maximum wide, densely punctate except for rugose below antennal sockets. Frons densely punctate except for a pair of smooth areas above antennal sockets, weakly concave above antennal sockets. Gena almost straight in dorsal view (Fig. 1M). Length of malar space 1.0–1.1 (HT: 1.0) × as long as basal mandibular width. Mandible almost flat basally, with a wide ventral flange except for apex (Figs 1L, N). Upper tooth of mandible almost as long as lower tooth. OD: POL: OOL = 1.0: 1.8– 1.9 (HT: 1.8): 1.35–1.5 (HT: 1.4). Flagellum with 28–29 (HT: 29) segments. FL I 6.0 × as long as maximum depth in lateral view and 1.3–1.43 (HT: 1.43) × as long as FL II.
Mesosoma. Lateral aspect of pronotum punctate dorsally, longitudinally strigose ventrally. Epomia present, rather strongly raised. Posterior end of notauli reached to middle of mesoscutum. Mesoscutum densely punctate. Scutellum punctate. Mesopleuron densely punctate, without a smooth area on speculum. Epicnemial carina present, its dorsal end not reaching the anterior margin of mesopleuron, its ventral part without a rounded tooth-like projection (Fig. 1P). Mesosternum with the short median portion of posterior transverse carina. Metapleuron covered with oblique rugae. Juxtacoxal carina absent except for anterior part present. Propodeum punctate and reticulate rugose. Anterior section of lateromedian longitudinal carina present. Anterior transverse carina complete. Posterior transverse carina complete except for median part absent. Pleural carina present on anterior section, absent on posterior section. Propodeal spiracle elongate. Area basalis strongly slopping and widened anteriorly. Fore wing length 6.0–7.9 (HT: 7.8) mm. Areolet pentagonal, large, vein 2rs-m and vein 3rs-m subparallel (more than 90% of specimens including holotype) (Fig. 15F) or slightly convergent anteriorly (in a few specimens with small body size). Nervellus of hind wing intercepted slightly below the middle by second abscissa of vein Cu (Fig. 15F). Fore femur normal shape (Fig. 1O), length 4.5 × as long as maximum depth in lateral view. Hind femur 5.7–6.0 (HT: 6.0) × as long as maximum depth in lateral view. Hind TS I: II: III: IV: V = 4.2–4.7 (HT: 4.7): 2.0: 1.4–1.5 (HT: 1.5): 0.9: 1.1.
Metasoma. T I 2.3–2.7 (HT: 2.4) × as long as maximum width, largely smooth, with a few, sparse punctures, without latero-median carina (Fig. 2N), without a pair of small convexities at base. Dorso-lateral carina of T I absent. T II 0.75–0.85 (HT: 0.8) × as long as maximum width, with normal sized laterotergite (Fig. 2N). Spiracle of T II nearer to lateral margin than to hind margin (Fig. 2N). T II, T III and T IV finely coriaceous and finely punctate. Ovipositor sheath 0.29–0.33 (HT: 0.29) × as long as hind tibia, shorter than T I. Apex of ovipositor as Fig. 3O.
Colouration (Figs 15 A-F). Body (excluding wings and legs) black to blackish brown, except for: FL VI or FL VII to FL IX or FL X white except for outer surface; ovipositor reddish brown. Wings hyaline. Veins and pterostigma blackish brown to brown. Legs black to blackish brown, except for: fore and mid trochantelli, femora, tibiae and tarsi more or less tinged with reddish brown to brown; base and apex of hind femur narrowly tinged with reddish brown to brown. Posterior margin of metasomal tergites usually narrowly tinged with reddish brown.
Male. Unknown.
Distribution. Japan (Honshu and Kyushu).
Etymology. The species name is from short ovipositor.
Remarks. This species resembles T. maruyamana (Uchida, 1930) in the black body and the white spot of antenna, but it can be distinguished by the ovipositor sheath 0.29–0.33 × as long as hind tibia (0.45 in T. maruyamana), the pronotum with longitudinal striae (without striae except for short striae along posterior margin in T. maruyamana), the palpi entirely blackish brown to black (second and third segments of maxillary palpus with yellow area in T. maruyamana) and the hind tarsus entirely blackish brown to black (TS II to TS IV white in T. maruyamana). This species also resembles T. ambiqua (Tschek, 1871) in body structures but it can be distinguished from the black metasoma (red to dirty orange in T. ambiqua) and the FL I 6.0 × as long as maximum depth in lateral view (4.5–5.5 in T. ambiqua).
description: Published as part of Watanabe, Kyohei, 2020, Expression of green fluorescent protein defines a specific population of lamina II excitatory interneurons in the GRP :: eGFP mouse, pp. 29-66 in Bulletin of the Kanagawa Prefectural Museum (Natural Science) 49 on pages 62-63, DOI: 10.5167/uzh-196963, http://zenodo.org/record/11266916