Proclitus tuberculatus, Watanabe, 2023

Watanabe, Kyohei, 2023, Taxonomic and Zoogeographic Notes on Japanese Orthocentrinae (Hymenoptera, Ichneumonidae), with Descriptions of Four New Species, Bulletin of the Kanagawa Prefectural Museum (Natural Science) 52, pp. 7-44 : 38-40

Proclitus tuberculatus sp. nov.

[New SJN: Munakobu-onaga-hae-himebachi]

( Figs. 21A–G , 23B, D, E )

Type series. Holotype: JAPAN: KPM-NK 81149 , F, Kagoshima Pref., Tokunoshima Is., Kedoku, 21. V. 2008, K. Watanabe leg. Paratypes: JAPAN: KPM-NK 81185 , F, Kanagawa Pref., Odawara City, Iriuda , 15. II. 2013, K. Watanabe leg. ; TMNH, F, Aichi Pref., Toyohashi City, Unoya Town, Nabeyamashita , 3. X. 2017, S. Morishita leg. ; TMNH, F, ditto, 1. XI. 2017 ; TMNH, 1 F & 1 M, ditto, 20. IV. 2018 ; NARO, F, Kagoshima Pref., Amamioshima Is., Yuwan, 3. V. 1953, T. Shiraki leg. ; KPM-NK 81150 , F, Kagoshima Pref., Amamioshima Is., Sumiyou, Santaro-toge, 12–14. IV. 2007, T. Ishizaki leg. ; KPM-NK 81151 , F, Kagoshima Pref., Amamioshima Is., Sumiyou, Gusuku, 29. VI. 2013, S. Yoshizawa leg. ; KPM-NK 81154–81162 , 4 F & 5 M, same locality and collector of holotype, 20. V. 2008 ; OMNH, 1 F & 1 M, ditto; TMNH, 1 F & 1 M, ditto ; KPM-NK 81152 , 81153 , 2 M, same data of holotype ; KPM-NK 81163 , M, Kagoshima Pref., Tokunoshima Is., San, Mt. Amagi-dake, Tete-rindo , 31. V. 2007, M. Gunji leg. ; KPM-NK 81164–81168 , 1 F & 4 M, Kagoshima Pref., Tokunoshima Is., San, Mt. Amagi-dake , 18. V. 2008, K. Watanabe leg. ; KPM-NK 81169 , M, Kagoshima Pref., Tokunoshima Is., Isen Town, Nakayama , 21. V. 2008, K. Watanabe leg. ; KPM-NK 81174 , 81175 , 2 F, Kagoshima Pref., Tokunoshima Is., Amagi Town , Mt. Yamatogusukuyama , 30. V. 2007, K. Watanabe leg. ; KPM-NK 81170–81173 , 2 F & 2 M, ditto, 31. V. 2007 ; KPM-NK 81176–81181 , 4 F & 2 M, Kagoshima Pref., Tokunoshima Is., Amagi Town, Amagi , 25. V. 2007, K. Watanabe leg. ; NARO, 25 F & 9 M, Okinawa Pref., Okinawajima Is., Kunigami Vil., 30. III. – 3. IV. 1999, K. Konishi leg. (yellow pan trap) ; KPM-NK 81182 , M, Okinawa Pref., Okinawajima Is., Kunigami Vil., Yona, 21. V. 2007, K. Watanabe leg. ; NARO, F, Okinawa Pref., Iriomotejima Is., Shirahama, Ushikunomori, 3. XI. 1963, H. Hasegawa leg. ; KPM-NK 81183 , M, Riverside of Urauchigawa , 14. V. 2008, K. Watanabe leg.

Diagnosis. Anterior tentorial pit invisible. Antenna with 18 flagellomeres. Mesoscutum with a pair of strong tubercles near the anterior ends of each notaulus. Coxae yellow to yellowish brown. T I 2.85–3.4 (female) or 3.2–3.8 (male) times as long as apical width. Ovipositor sheath 1.5–1.85 times as long as hind tibia.

Description. Female (n = 49). Body length 3.2–4.8 ( HT: 4.3) mm, polished, smooth and covered with silver setae.

Head 0.7–0.75 ( HT: 0.7) times as long as wide. Clypeus 1.9–2.0 ( HT: 1.9) times as broad as high, weakly convex in lateral view, its anterior margin simply arched. Anterior tentorial pit invisible. Face 1.0–1.05 ( HT: 1.0) times as broad as high, flat, with a pair of longitudinal shallow concavities. Malar space 0.9–1.3 ( HT: 0.9) times as long as basal mandibular width. POL 0.9–1.3 ( HT: 1.0) times as long as OD. OOL 0.8–1.2 ( HT: 0.8) times as long as OD. Inner eye orbit almost parallel. Occipital carina complete. Mandible not twisted, flat basally, upper tooth longer than lower tooth. Flagellum with 18 segments, all segments longer than its maximum depth in lateral view. FL I 5.0–5.7 ( HT: 5.7) times as long as maximum depth in lateral view and 1.2–1.3 ( HT: 1.2) times as long as FL II.

Mesosoma 1.3–1.4 ( HT: 1.3) times as long as maximum depth in lateral view. Epomia present but short. Mesoscutum with a median longitudinal shallow groove, with a pair of tubercles on each anterior end of notaulus. Scutellum with lateral carinae at base. Epicnemial carina present laterally and ventrally. Propodeum with posterior transverse carina, posterior section of lateral longitudinal carina and pleural carina. Base of both the anterior sections of lateromedian longitudinal carina and lateral longitudinal carina usually present as short carinae. Fore wing length 2.9–4.5 ( HT: 4.2) mm. Vein 1cu-a of fore wing interstitial. Pterostigma received vein 2r&RS slightly anterior to the middle. Hind wing with nervellus not intercepted, reclivous. Hind femur 4.4–5.3 ( HT: 4.8) times as long as maximum depth in lateral view, club-shaped. Hind TS I 2.0–2.1 ( HT: 2.1) times as long as TS II. Hind TS II 3.3–5.0 ( HT: 5.0) times as long as maximum depth in lateral view. Tarsal claws simple.

Metasoma. T I 2.85–3.4 ( HT: 3.3) times as long as maximum width, with a pair of longitudinal ridges posteriorly. T II 1.0–1.2 ( HT: 1.0) times as long as maximum width, with tyridium and a few punctures. T II to T VII with a few punctures. Ovipositor sheath 1.5– 1.85 ( HT: 1.7) times as long as hind tibia and 0.5–0.6 ( HT: 0.6) times as long as fore wing. Apex of ovipositor with a conspiciuous nodus.

Coloration ( Figs. 21A–D ). Body (excluding wings and legs) black to blackish brown. Mandible except for apex, basal segments of antenna, palpi, and membranous part of metasomal sternum whitish yellow. Clypeus, prpnotum, propleuron, mesoscutum except for three longitudinal blackish stripes, upper part of mesopleuron, scutellum, axillae, postscutellum, posterior part of T II, T III, and apex of metasoma yellowish brown to reddish brown. T III usually more or less tinged with blackish brown to brown. T IV and T V usually paler than T I. Wings hyaline. Veins and pterostigma blackish brown to brown. Legs reddish yellow to yellowish brown. Fore and mid coxae and trochanters whitish yellow. Hind coxa and trochantellus partly and narrowly darkened. Base and apex of hind femur and tibia darkened.

Male (n = 31). Similar to female. Body length 2.8–5.0 mm. Malar space 0.6–0.8 × as long as basal mandibular width. Flagellum without tyloid. FL I 4.4–5.0 times as long as maximum depth in lateral view. Hind TS II 2.85–3.3 times as long as maximum depth in lateral view. T I 3.2–3.8 × as long as maximum width. T II 1.25–1.5 × as long as maximum width.

Distribution. Japan (Honshu, Amamioshima Is., Tokunoshima Is., Okinawajima Is. and Iriomotejima Is.).

Etymology. The specific name is from the Latin tuberculum (tubercle). This species has a pair of distinct tubercles on the mesoscutum.

Bionomics. Host is unknown. In Japan, adults are collected in broadleaf forests and can be collected in winter.

Remarks. In the Oriental part of the Ryukyu Islands, only Pr. tuberculatus sp. nov. and Pr. ganicus have been found. Proclitus tuberculatus and Pr. wuyiensis Sheng & Sun, 2013 (male unknown) can be grouped together in one group in the mesoscutum with a pair of strong tubercles near the anterior ends of each notaulus. This species can be easily distinguished from Pr. wuyiensis by the length of ovipositor sheath 1.5–1.85 times as long as hind tibia (2.6 times as long as hind tibia in Pr. wuyiensis ).

Figures

Fig. 21. Proclitus tuberculatus sp. nov. (A–C: KPM-NK 81149, holotype; D: KPM-NK 81181, paratype, female; E–G: KPM-NK 81153, paratype, male) ― A, E: lateral habitus; B, F: head, frontal view; C, G: head, mesosoma, and metasoma, dorsolateral view; D: hind leg, lateral view.

Fig. 23.A, C: Proclitus ganicus Sheng & Sun, 2013 (KPM-NK 81123, female); B, D, E: Pr. tuberculatus sp. nov. (KPM-NK 81149, holotype, female); F, I, J: Megastylus (Dicolus) impressor Schiødte, 1838 (EUM, female); G, H: M. (Dic.) excubitor (Förster, 1871) (KPM-NK 89786, female); K: M. (Dic.) pectoralis (Förster, 1871) (KPM-NK 89793, female) ― A, B: pronotum and mesoscutum, lateral view; C, D: mesoscutum and scutellum, dorsal view; E: mesoscutum, anterior view; F: propodeum, dorsal view; G, I: fore tibia and tarsus, lateral view; H: base of fore TS I, lateral view; J, K: hind tibia, lateral view.