Beleses nigrifemoratus Togashi, 1999

Ryoo, Seung-Woo, Min, Jin-Young, Son, Seok-Yoon, Choi, Baek-Yong, Choi, Juho & Min, Kyoung-Bok, 2022, Taxonomic Notes and New Distribution and Host Plant Records for Sawflies and Woodwasps (Hymenoptera, Symphyta) of Japan VII, Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (4), pp. 193-213 : 198-201

publication ID	https://doi.org/ 10.50826/bnmnszool.48.4_193
persistent identifier	https://treatment.plazi.org/id/6E482241-FFD0-5861-69DF-FB7A21513929
treatment provided by	Felipe
scientific name	Beleses nigrifemoratus Togashi, 1999
status

Treatment

New Japanese name: Akaobi-sarunashi-habachi

( Figs. 4 View Fig , 5 View Fig )

Beleses nigrifemoratus Togashi, 1999: 569 ; Togashi,

2004: 53; Taeger et al., 2010: 268; Naito, 2019: 51. Beleses eikoae Togashi, 2004: 53 . Syn. nov.

Additional description, female. Fig. 4A–D View Fig . Length 8.0–8.5 mm. Antenna black, yellow white on wide apex of flagellomere 3 and flagellomeres 4 or 4–5, sometimes also on ventrolateral parts of scape and flagellomeres 1–2 and 6–7. Abdomen dorsally black, red yellow to brown from wide posterior part of tergum 1 to tergum 5 except for anterior margin of tergum 2 or only on tergum 3 and wide part of tergum 4; laterotergites 2–6 or 3–6 yellow. Legs yellow white; coxae basally dark brown; fore and middle femora or middle femur yellow brown to dark brown except for bases and apices; hind femur black except for narrow base including trochantellus; hind tibia black, sometimes slightly pale at middle; hind tarsomere 1 black but yellowish on very narrow apex and sometimes also on very narrow ventral part.

Postocellar area with median ridge indistinct or anteriorly distinct ( Fig. 4J–K View Fig ). OOL: POL: OOCL=1.3–1.5: 1.0: 1.2–1.5. Tarsal claws with inner tooth long or short. Mesoscutellar appendage with punctures indistinct or very small and shallow. Hind leg with tarsomere 1 as long as tar- someres 2–5 combined. Ovipositor Fig. 5A, B View Fig ; lancet with about 21–22 serrulae; middle ctenidia each about half as long as its corresponding annulus, with many setaceous teeth.

Male. Fig. 4E, F View Fig . Differing from female as follows except for usual sexual differences.

Length 7.0–8.0 mm. Antenna black, ventrolat- erally white to brownish white from scape or pedicel to flagellomere 3 or 4. Narrow posterior part of mesoscutellum and mesoscutellar appendage often brown. Hind tarsus yellow white, black from tarsomere 1 to tarsomere 2 except for narrow apex or to basal half of tarsomere 3. Laterotergites 3–4 or 3–5 yellow Hind wing with mar- ginal vein. Genitalia as in Fig. 5C–F View Fig ; parapenis apically widely rounded; penis valve with one small apical spine.

Larva. Length 14–16 mm in final feeding (semifinal) and final instars. In middle to final feeding instar, head pale brown or grayish brown, trunk pale gray covered with white wax bloom and thoracic legs pale gray ( Fig. 5I–J View Fig ). In final instar, head and thoracic legs pale brown and trunk pale yellow ( Fig. 5K View Fig ). Abdominal terga 1–8 each with 6 annulets. Prolegs present on segments 2–8; anal proleg absent.

Material examined. Holotype of Beleses nigrifemoratus Togashi, 1999 : $, l 1300–1500 m, Mt. Hakusan, Ishikawa Pref., 5. V. 1998, I. Togashiz, lNSMT-HYM 62262z, lHolotype Beleses nigrifemoratus sp. nov. z ( Fig. 4A, B, G, J View Fig ). Holotype of Beleses eikoae Togashi, 2004 : $, lMt. Rokuman, Siramine-mura, Ishikawa Pref., 3. VI. 2003, I. Togashiz, lNSMT-HYM 62247z, lHolotype, Beleses eikoae n. sp. z ( Fig. 4C, D, H, K View Fig ). Paratype of B. eikoae : 1 Ə, lMt. Rokuman, Siramine-mura, Ishikawa Pref., 3. VI. 2003, I. Togashiz, lNSMT-HYM 62248z, lParatype, Beleses eikoae n. sp. z ( Fig. 4E, F, I View Fig ).

Other material examined: Honshu: Tochigi Pref.: 3 $1 Ə, Nakagawa, Koisago , 36°47′N 140°11′E, coll. larvae on Actinidia arguta var. arguta , 8. V. 2015, mat. 18. V., em. 4, 6, 8, 14. IV. 2016, S. Ibuki ( Fig. 5A, B, G, I, K View Fig ); 3 Ə, progeny of one of above 3 $ (em. 6. IV. 2016), eggs laid 10. IV. 2016, hatched 20. IV. 2016, mat GoogleMaps .

8. V., em. 15, 18. IV. 2017 ( Fig. 5C–F, H View Fig ) ; 2 Ə, same locality and collector, coll. 6 gregarious larvae on Actinidia arguta var. arguta , 6. V. 2016, mat. 16–17. V., em. 17. IV. 2017 .— Gunma Pref.: 1 Ə, Mt. Akagisan , 1000 m, 17–20. V. 2001, A, Shinohara. — Kanagawa Pref.: 1 $4 Ə, Zushi, Jinmu-ji , 21. IV. 1995 , H. Nagase; 1 $, Minoge , 29. IV. 1972 , T. Saito. — Yamanashi Pref.: 1 $, Sutama, Masutomi , 12. VI. 1987, S. Takeda. — Nagano Pref.: 1 $, Minamiaiki, Kuriu, Ogurayama , 25. V. 1987, T. Isozaki. — Kyoto Pref.: 3 $, Ukyo, Hozukyo , 1400 m, 35°02′N 135°38′E,ɹ 25. IV. 2014 GoogleMaps , H. Yoshida. — Osaka Pref.: 1 Ə, Kawachinagano, Takihata , 22. IV. 1981 , A. Shinohara. — Tottori Pref.: 1 Ə, Mt. Daisen, Jadani , 20. V. 1981, A. Shinohara.

Distribution. Japan: Honshu ( Togashi, 1999, 2004).

Host plant. Actinidiaceae : Actinidia arguta (Siebold et Zucc.) Planch. ex Miq. var. arguta (new record).

Life history. Young gregarious larvae were found in early May in Nakagawa, Tochigi Prefecture. There were several egg marks on the leaf which was infested by the larvae ( Fig. 5I View Fig , arrowed). The egg marks were separated from each other and apart from the midvein. The young larvae ate the insides, not outer margins, of leaves. In the rearing room, the larvae exe- cuted the extra molt and matured in middle May ( Fig. 5K View Fig ). They made cocoons in the soil and overwintered. The adults emerged in the following spring. This species has one generation per year.

Remarks. Togashi (2004) wrote for his new species, B. eikoae , lThis new species is very closely allied to B. nigrifemoratus Togashi , but it is easily distinguished from the latter by the mostly yellow 1st tergite (entirely black in nigrifemoratus ), the yellow lateral sides of the 2nd tergite (black in nigrifemoratus ), the entirely black hind basitarsus (apical portion milky white in nigrifemoratus ), the bifurcate apex of the fore inner tibial spur (rather simple in nigrifemoratus ), and having a distinct postocellar furrow (indistinct in nigrifemoratus ).z Actually, the holotype of B. nigrifemoratus has the abdominal tergum 1 widely brown ( Fig. 4A View Fig ) and the holotype of B. eikoae has the abdominal tergum 2 laterally blackish ( Fig. 4D View Fig ) and the hind tarsomere 1 apically yellowish ( Fig. 4D View Fig ). The difference of the anterior fore tibial spur between the holo- types of B. eikoae ( Fig. 4H View Fig ) and B. nigrifemoratus ( Fig. 4G View Fig ) is slight, and the anterior fore tibial spur of the paratype of B. eikoae ( Fig. 4I View Fig ) is intermediate between the spurs of these holo- types. Both the postocellar furrows of these holo- types ( Fig. 4J, K View Fig ) are sharp and distinct. Therefore, we synonymize B. eikoae with B. nigrifemoratus .

Beleses nigrifemoratus is very similar to B. zonalis Togashi, 1972 described from Kyushu, Japan. They are distinguishable at least by the hind tibia color. The former has a black hind tibia, at most slightly pale at the middle ( Fig. 4B, D View Fig ), while the latter has a yellowish white hind tibia, darkened at the apex.

The host plant and larva of B. nigrifemoratus are recorded for the first time. Beleses satonis ( Takeuchi, 1929) is also associated with Actinidia arguta ( Hara et al., 2015) View in CoL . Their larvae are very similar, but the former has a brown head while the latter has a black head. These two larvae will be distinguished from other sawfly larvae by a combination of the simple and almost semi-cylindrical body, the thin wax bloom cover- ing the body, the abdominal terga 1–8 each with 6 annulets, the proleg present on each of the abdominal segments 2–8 and absent on the anal segment, and the host plant, Actinidia View in CoL .