Neohybrizon mutus Hisasue & Konishi, 2019

Hisasue, Yu & Konishi, Kazuhiko, 2019, A new genus of the subfamily Hybrizontinae (Hymenoptera: Ichneumonidae) from Japan, Zootaxa 4664 (2), pp. 241-250 : 243-246

Neohybrizon mutus Hisasue & Konishi , sp. nov.

Gen. sp. Komatsu & Konishi, 2010: 575.

Material examined. Holotype, ♀, Hitsujigaoka (43.00°N / 141.24°E), Sapporo, Hokkaido, Japan, 6–13.viii.2003 (K. Konishi), MT, EUMJ .

Paratypes: [Hokkaido] 1♀ (9–22. viii. 2002), 4♀ (6–13. viii. 2003), 14♀ (13–20. viii. 2003), 1♀ (27. viii–3.ix. 2003), 1♀ (19–26.vii.2007), 3♀ (26.vii–2.viii.2007), 7♀ (2–9.viii.2007)& 4♀ (9–16.viii.2007), 43°00’N / 141.24°E, Hitsujigaoka , Sapporo (K. Konishi), MT, EUMJ, ZI ; 5♀ (7–14. viii. 2009), 5♀ (14–21. viii. 2009), 3♀ (21–28. viii. 2009), 1♀ (28. viii–4. ix. 2009) & 1♀ (11–18. ix. 2009), 43°00’09”N / 141°24’56”E, Hitsujigaoka , Sapporo (K. Konishi), MT, EUMJ ; 2♀ (1–8. viii. 2012), 1♀ (15–22. viii. 2012), 2♀ (25. vii–1. viii. 2012), 3♀ (8–15. viii.2012) & 1♀ (22–29. viii. 2012), 43°00’24”N / 141°24’52”E, Hitsujigaoka , Sapporo (K. Konishi), MT, EUMJ ; 8♀ (18–26. viii. 1998, K. Mizota et al.) & 3♀ (4–18. viii. 2001, 42°58’N / 141°12’E, T. Yoshida), Hyakumatsu-zawa, Sapporo, MT, BMNH, SEHU ; 6♀ (24. viii–7. ix. 1993, N. Kuhara, EUMJ), 2♀ (1–8. viii. 2000, K. Uesugi, SEHU), 12♀ (1–8. viii. 2000, K. Uesugi, SEHU) & 8♀ (7. viii–13. ix. 2002, stream side, 42°58’N / 141°15’E, T. Yoshida, SEHU), MT, Kannon-zawa, Sapporo ; 8♀, Misumai (small stream), Sapporo , 27. vii–13. viii. 1994 (N. Kuhara, MT), EUMJ ; 1♀ (24–31. viii. 2001, H. Sugaya, FIT) & 1♀ (7. vii. 2002, 42°57’N / 141°14’E, T. Yoshida), Mt. Hakken-zan , Sapporo, SEHU ; 9♀ (7. viii. 1999), 11♀ (14. viii. 1999), 1♀ (21. viii. 1999) & 1♀ (28. viii. 1999), Mt. Maruyama (50 m), Sapporo (K. Mizota et al.), MT, SEHU ; 1♀, Mt. Okuteine-yama (43°04’N / 141°08’E), Sapporo , 3–17. vii. 2011 (R. Takayanagi, MT), SEHU ; 3♀ (27. vii–21. viii. 2007, Natural forest, 42°54’N / 141°16’E) , 11♀ (27. vii–21. viii. 2007, Selectively cut forest, 42°54’N / 141°16’E) & 3♀ (27. vii–21. viii. 2007, Natural forest, 42°56’N / 141°16’E), Mt. Soranuma-dake , Sapporo (A. Ueda), MT, AEI, EUMJ ; 1♀, Nakayama-toge, Sapporo , 4. ix. 2003 (T. Yoshida), SEHU ; 1♀ (9. viii. 2001, T. Yoshida, SEHU) & 3♀ (18–31. viii. 1993, N. Kuhara, MT, EUMJ), Nopporo, Ebetsu ; 8♀ (3–17. viii. 2007, 180 m, 43°00’N / 142°04’E) , 2♀ (17–31. viii. 2007, 180 m, 43°00’N / 142°04’E) & 3♀ (16. vii–6. viii. 2008, 263 m, 43°01’N / 142°05’E), Ohyubari (Natural forest), Yubari (A. Ueda), MT, EUMJ ; 11♀ (13–21. viii. 2001), 20♀ 3♂ (21. viii–3. ix. 2001) & 1♀ (3–21. ix. 2001), Moizari River, Eniwa (T. Ohkawara & T. Ito), MT, EUMJ ; 10♀, Kusabue-rindo (42.7154°N / 141.2143°E), Chitose , 17. viii–1. ix. 2012 (N. Kuhara, MT), BM, EUMJ ; 1♀, Lake Shikotsu, Chitose , 28. vii–11. viii.2000 (K. Uesugi, MT), SEHU ; 1♀, Oohonai River, Makkari , 18–28. viii. 1998 (M. Nakajima, MT), NIAES ; 3♀ (11–29. viii. 2002, 42°29’22”N / 141°03’34”E) & 2♀ (29. viii–23. ix. 2002, 42°29’N / 141°03’E), Mt. Raiba-dake , Noboribetsu (T. Yoshida), MT, SEHU ; 1♀, Ohnuma, Nanae , 24. viii. 1994 (R. Matsumoto), OMNH . [Honshu] Aomori Pref.: 1♀, Kawaratai (40°31’N / 140°10’E), Nishimeya , 15–25. vii. 2013 (T. Nakamura, MT), EUMJ . Tochigi Pref.: 5♀ (24. vii–17. viii. 2014) & 9♀ (1-25. viii. 2013), Dodaira, Enna-skyline, Nasushiobara (T. Nakayama), MT, EUMJ ; 6♀, Nikko-zawa–Kinunuma, Nikko , 14. viii. 2004 (H. Makihara, MT), EUMJ ; 1♀, Sukkan-sawa, Kita-one (1000 m), Nasushiobara , 13–21. viii. 2008 (T. Matsumura, MT), TPM . Gunma Pref.: 1♀, Mt. Hotakasan , 29. viii. 2006 (H. Katahira), KPMNH . Niigata Pref.: 1♂, Sasagamine (1230–1290 m) (36°51'N / 138°04'E), Myoko , 17. viii. 2013 (S. Shimizu), Sweeping , EUMJ . Nagano Pref.: 1♀, Utsukushi-matsu (1350 m) (36.135°N / 138.234°E), Nagawa , 23. viii. 2012 (S. Fujie), EUMJ ; 1♀, Abo-toge, Matsumoto , 5. ix. 2009 (T. Komatsu), EUMJ ; 1♂, Mt. Ontake-san–Mt. Hakkai-san (1660–1700 m) (35°51'47"N / 137°31'37"E), Ohtaki , 8. viii. 2010 (K. Watanabe), KPMNH . Gifu Pref.: 1♀ (24. vii-3. viii. 2010) & 2♀ (9–16. viii. 2010), Shima (800 m), Shirakawa (R. Sugiura & H. Sumi, MT), OMNH ; 1♀, Hidarimata, Kamitakara , 1. ix. 1996 (M. Sueyoshi), OMNH . Osaka Pref.: 1♀ (23. vii–2.viii. 2002), 14♀ (2–10. viii. 2002) & 1♀ (10–20. viii. 2002), Mt. Izumi-Katsuragisan , Kishiwada (R. Matsumoto, MT), OMNH . Nara Pref.: 1♀, Nikaidake–Kinomiyazuka (34.3507°N / 136.0661°E), Mt. Azami-dake, Kawakami , 6–23. viii. 2010 (R. Matsumoto, MT), OMNH. [Shikoku] Ehime Pref.: 1♀, Hontani, Odamiyama , 26–30. ix. 2008 (E. Yamamoto, MT), EUMJ ; 1♀, Omogokei, Kumakogen , 20. ix. 1958 (K. Kamijo), SEHU .

Description. FEMALE (n=20) ( Fig. 4 ). Body 4.5–5.6 mm long. Fore wing 3.4–4.7 mm long. Head wider than high, 0.6–0.9 × as long as wide in frontal view ( Fig. 1 ); head length 0.4–0.5 × as long as wide ( Fig. 2 ); face with median longitudinal convexity and with a short longitudinal ridge on dorso-median portion; face smooth except on median longitudinal convexity granulate; POL 0.8–1.2 × as OD; OOL 0.7–1.3 × as long as OD; LOL 0.3–1.0 × as long as OD; FI 0.2–0.3; occiput and interocular area polished; minimum interocular distance 1.2–1.9 × as long as compound eye width of same line; inner margins of eyes convergent toward ventrally, not emarginated at antennal socket; gena to vertex along the outer orbit of eye with sparse hairs; GOI 2.4–5.3; occiput higher than wide ( Fig. 6 ); occipital carina strong ( Fig. 6 ); anterior tentorial pit large and deep; clypeus very narrow, apical portion of clypeus 0.2–0.4 × as wide as minimum interocular distance, with some longitudinal striae, apical margin rounded; malar space concaved into a crescentic, apical margins depressed, with carina; mouth parts much reduced; mandible absent; area of surrounded by hypostomal carina elliptic; maxillary palpus reduced to 1 segment; labial palpus disappeared; antenna with 11 flagellomeres ( Fig. 8 ); scape about as long as pedicel or somewhat short, F1 relatively slender, 7.3–11.7 × as long as wide; relative proportion of length of all flagellomeres, F1: F2: F3: F4: F5: F6: F7: F8: F9: F10: F11= 3.3: 2.4: 2.3: 2.3: 2.2: 2.2: 2.1: 2.0: 1.9: 1.7: 2.2.

Mesosoma polished ( Fig. 10 ); anterior margin of pronotum with transverse groove, and with ventral margin rounded; pronotal collar short ( Fig. 14 ); mesoscutum 1.1–1.4 × as long as wide except marginal ring, highly elevated and narrowed toward anteriorly; marginal rim of mesoscutum lamellate; anterior half of mesoscutum scattered punctures with hairs except median part; posterocentral area of mesoscutum depressed; scutellum basically impunctate, with lateral carina extending anterior half; post scutellum strongly convex; epicnemial carina absent ( Fig. 12 ); mesopleural fovea elongate to median portion of mesopleuron and rugose; mesopleural suture distinct; anterior portion of mesopleuron rounded, with hairs and fine wrinkles ( Fig. 12 ); sternalus absent; posterocentral portion of metapleuron depressed; pleural carina strongly curved; propodeum with rugose carinae, with sparse hairs; propodeal spiracle elliptic. Legs with weak and dense hairs ( Fig. 15 ); femora clavate. Fore coxa with longitudinal carina. Hind coxa 1.9–2.7 × as long as trochanter; femur 5.5–7.8 × as long as trochanter; tibia curved dorsally at apical 1/3; basitarsus 0.7–0.9 × as long as following tarsomeres combined; 1–3 tarsomeres parallel sided in lateral view; 2–5 tarsal segments weakly flattened; 4th tarsomere 1.3–1.9 × as long as 5th tarsomere; maximum width of 4th tarsomere 1.4–1.8 × as wide as maximum width of 5th tarsomere; apical width of 5th tarsomere as wide as basal width.

Fore wing entirely covered with dense hairs ( Fig. 9 ); stigma slender, over 8.9 × as long as maximum width; M+CU non-tubular except apical area; RS almost straight, apical 1/5 slightly curved; M entirely straight; AA nontubular except apical portion; 1cu-a opposite M&RS; 2r&RS short, 0.2–0.3 × as long as 1m-cu&M; 1m-cu&M 2.5–3.5 × as long as first abscissa of CU; distal abscissa of CU straight, apical 1/4 non-tubular; 2cu-a present basal half; RS+M very short, sometimes absent; M+CU present only apical portion. Hind wing slender, 4.8–5.9 × as long as wide, and with four hamuli; veins non-tubular except R; RA, RS, M+CU, M and CU colored.

Metasoma slender ( Fig. 16 ); T1–T4 depressed, smooth and hairless except apical and lateral marginal areas with sparse hairs; T1 polished, 3.3–4.3 × as long as apical width, apical width 1.4–1.8 × as wide as basal width, posterocentral area with longitudinal depression ( Fig. 16 ); T2 1.1–1.5 × as long as T1, 2.9–4.7 × as long as apical width, apical width 1.1–2.1 × as wide as basal width, with some wrinkles laterally, and dorsal contour concave in lateral view; around spiracles of T1 and T 2 triangularly raised ( Fig. 16 ); T3 1.4–3.1 × as long as apical width; dorsal contour of T2 and basal portion of T3 concave in lateral view; T5–T7 compressed, and entirely covered with dense hairs; ovipositor tapering toward apex; ovipositor sheath 0.2–0.4 × as long as hind basitarsus, lateral and dorsal area with dense hairs.

Coloration: Head blackish-brown; clypeus yellowish brown except apical 1/5 whitish yellow, antennal sockets, scapes, basal half of 1st flagellomere yellow-brown; distal half of 1st flagellomere, triangular tubercle, pedicels yellowish-brown; maxilla, labium, maxillary and labial palpi pale-yellow. Mesosoma blackish-brown; propleuron, mesoscutum, scutellum, and lower part of mesopleuron brown; anterior portion of mesoscutum brownish-brown except central part; lower part of pronotum, anterolateral margin of mesonotum, marginal ring of mesoscutum, posterolateral margin of scutellum, posterior margin of propodeum yellowish-brown; anterior margin of mesopleuron and tegula pale-yellow. Fore and middle legs brownish-yellow; fore and middle coxae and trochanters whitishyellow. Hind leg brown; hind coxa brownish-yellow. Wings hyaline; stigma and veins blackish-brown. Metasoma brown; T1 and sternite blackish-brown; anterior margins of T2–T3, and 4T brownish-yellow; ovipositor brownishyellow; T2–T4 whitish-yellow.

MALE (n=5) ( Fig. 5 ). Body 4.8–5.4 mm long. Fore wing 3.7–4.2 mm long. Similar to females except as follows. Head wider than high, 0.7 × as high as wide in frontal view ( Fig. 7 ); head length 0.5–0.6 × as long as wide; POL 1.1–1.5 × as OD; OOL 1.0–1.2 × as long as OD; LOL 0.7–1.0 × as long as OD; FI 0.2; minimum interocular distance 1.8–2.2 × as long as compound eye width of same line; GOI 2.3–3.8; clypeus very narrow, apical portion of clypeus 0.2–0.3 × as wide as minimum interocular distance; malar space often strongly concaved than female; F1 7.8–13.5 × as long as wide; relative proportion of length of all flagellomeres, F1: F2: F3: F4: F5: F6: F7: F8: F9: F10: F11= 3.0: 2.3: 2.2: 2.3: 2.3: 2.3: 2.2: 2.0: 2.0: 1.9: 2.3. Mesoscutum 1.2–1.3 × as long as wide except marginal rim; scutellum more abruptly narrowed than in female. Hind coxa 1.9–2.5 × as long as trochanter; femur 5.4–7.5 × as long as trochanter; basitarsus 0.8–0.9 × as long as following tarsomeres combined; 4th tarsomere 1.3–1.6 × as long as 5th tarsomere; maximum width of 4th tarsomere 1.2–1.5 × as wide as maximum width of 5th tarsomere. Stigma, over 10 × as long as maximum width; 1m-cu&M 2.1–3.8 × as long as first abscissa of CU. Hind wing 4.9–6.1 × as long as wide. T1 3.2–3.5 × as long as apical width; T2 1.2–1.4 × as long as T1, 2.9–4.1 × as long as apical width, apical width 1.3–1.9 × as wide as basal width; T3 1.3–2.2 × as long as apical width. Subgenital plate transverse and somewhat reduced ( Fig. 17 ); apical margin emarginate medially and with a pair of hairs; basal margin without median apodeme and acute laterally ( Fig. 18-c ). Apical and antero-ventral margin of paramere with sparse hairs ( Fig. 18 ); apical margin of paramere truncated; apical part of digitus slightly expand. Aedeagus slender, penis valve slightly curved ( Fig. 19 ).

Coloration similar to females except clypeus and mesosoma, clypeus and lower part of mesopleuron whitish yellow ( Fig. 13 ), anterior portion of mesoscutum brownish-yellow except central part ( Fig. 11 ).

Distribution. Hokkaido, Honshu (Aomori, Tochigi, Gunma, Niigata, Nagano, Gifu, Osaka, Nara), Shikoku (Ehime).

Host. Myrmica kotokui Forel, 1911 ( Hymenoptera : Formicidae ) ( Komatsu & Konishi, 2010).

Etymology. Named after the Latin ‘mutus’, meaning quiet, reffering to the much reduced mouth parts.

Figures

FIGURE 9. Fore and hind wings of Neohybrizon mutus sp. nov. Scale: 1.0 mm.

FIGURES 4–8. Neohybrizon mutus sp. nov.: 4, lateral habitus of female; 5, ditto male; 6, head of female in posterior view; 7, head of male in frontal view; 8, antenna of female. Scales: 4–5, 8, 1.0 mm; 6–7, 0.5 mm.

FIGURES 1–3. Head of Neohybrizon mutus sp. nov., female, showing measurements: 1, frontal view; a, head height; b, head width; c, interocular distance; d, compound eye width in the same line; e, clypeal width; 2, dorsal view; f, head length; g, POL; h, OOL; i, OD; j, median ocellus length; k, FI; l, LOL; 3, lateral view; m, maximum breadth of eye in lateral profile; n, breadth of gena in the same line. Scales: 0.5mm.

FIGURES 10–16. Neohybrizon mutus sp. nov.: 10, 12, 14–16, female; 11, 13, male; 10–11, mesonotum in dorsal view; 12–13, mesosoma in lateral view; 14, mesosoma in anterior view; 15, hind leg in lateral view; 16, T1 & T2 in dorsal view. Scales: 10–14, 16, 0.5 mm; 15, 1.0 mm.

FIGURES 17–19. Male terminalia of Neohybrizon mutus sp. nov.: 17, subgenital plate in ventral view; 18, paramere in mesal view; 19, aedeagus in lateral view. Scales: 0.1 mm.