Fagineura fulvistriata Hara 2022, sp. nov.
Creators: name: Hara, Hideho
name: Ibuki, Shinichi
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Tenthredinidae
Fagineura
Fagineura fulvistriata

description: Fagineura fulvistriata Hara, sp. nov.
(Figs 4A–E, L, M, 6H, 8J, R, Y, 9D, L, 10F, 12C)
Description: female. Length 7.5–9.0 mm (holotype 9.0 mm). Black (Figs 4A–E). Head capsule yellow to yellow brown, except for medial area of frons, ocellar area and its adjacent areas and occiput; postocellar area sometimes with dark narrow median and lateral lines (Fig. 6H). Labrum yellow, sometimes ventrally brown. Mandible yellow, apically red brown to black. Palpi yellow, apically darkened. Thorax yellow or brown yellow on pronotum, tegula, medial part of lateral mesoscutal lobe, mesoscutellar appendage, metanotum except for anterolateral part, postspiracular sclerite, epicnemium, mesepimeron, metepimeron and posterodorsal part of metepisternum; metascutellum often darkened centrally. Legs yellow on apices of coxae, most of trochanters and trochantelli, fore and middle tibiae except for dorsoapical areas, hind tibia except for wide apex, wide bases of fore and middle tarsi and narrow base of hind tarsus; tibial spurs and claws brown. Wings nearly colorless transparent; veins black; vein C brown, basally yellowish; vein A basally yellowish; stigma dark yellow, marginally dark brown. Abdomen with basal and middle terga yellow on narrow posteromedial margins; laterotergites brown yellow.
Head in dorsal view with length behind eye 0.4–0.5 × eye length (Fig. 6H); length behind lateral ocellus 3.1–3.4 × length of lateral ocellus. OOL:POL:OOCL 0.9:1.0:1.3–1.4. Frontal area with weak lateral ridge and well developed anterior ridge; frontal field with long lateral convexity. Distance between eyes at anterior tentorial pit 1.2–1.3 × major axis of eye (Fig. 4A). Inner edges of eyes nearly parallel. Malar space 0.5–0.6 × as long as median ocellus width. Antenna 2.3–2.4 × as long as head width (Fig. 4B); flagellum tapered; flagellomere 1 0.6–0.7 × as long as major axis of eye; flagellomere 2 1.1 × as long as flagellomere 1. Mesepisternum slightly expanded beside postspiracular sclerite (Fig. 8J). Hind tibia with posterior spur 1.1 × as long as apical breadth of tibia in lateral view. Fore wing without crossvein 2r-rs.
Valvula 3 in dorsal view about twice as wide as cercus, barely concave near pointed apex (Fig. 9D), in lateral view rounded apically, with dorsal edge slightly rounded and ventral edge gently rounded (Fig. 9L). Lance with dorsal edge slightly rounded (Fig. 10F). Lancet with radix about 0.5 × as long as lamnium (Fig. 12C); lamnium with 19 annuli; basal annuli slightly sinuous; middle and apical annuli straight and slightly oblique; annulus 1 and some apical annuli without ctenidium; ctenidia widely separated from each other, each consisting of some irregular transverse rows of setae; basal and middle ctenidia slightly expanded dorsally; basal serrulae with anterior slope shorter than posterior slope.
Head and thorax with punctures minute; interspaces between punctures generally smooth. Mesoscutum mostly covered with setiferous punctures; posterolateral hollow with rugose and granular microsculpture. Mesopostnotum with rugose and granular microsculpture, medially smooth. Metapostnotum mostly smooth. Postspiracular sclerite with many setae. Mesepisternum very narrowly glabrous beside postspiracular sclerite (Fig. 8J). Katepimeron with setae on wide or narrow dorsal area and along posteromiddle margin. Abdomen microsculptured imbricately, with punctures inconspicuous.
Male. Unknown.
Immature stages. Late instar larva: head and thoracic legs black (Fig. 4L); trunk grey dorsally, pale grey ventrally, with black supraspiracular stripe and broken black pleural stripe; thoracic segment 1 yellow; setae short. Mature final instar larva: 20 mm long; head black (Fig. 4M); thoracic legs pale grey, narrowly darkened apically and basally; trunk whitish yellow, yellow on thoracic segment 1 and most of dorsum, with black supraspiracular stripe and broken black pleural stripe; supraspiracular stripe not broken on abdominal segment 9; abdominal tergum 10 darkened; setae inconspicuous. Cocoon: 11 mm long, blackish brown, single walled.
Material examined. Holotype: ♀, “ JAPAN: Honshu, Tochigi Pref., Nakagawa, Wami, 36°46’N 140°10’E, coll. larva on Quercus acutissima 13. V. 2019, mat. 20. V., em. 28. III. 2020, S. Ibuki ”, “PHH 200330A” (Figs 4A–E, L, M, 6H, 8J, R, 9D, 12C). Paratypes: JAPAN: HONSHU: 1♀, Kyoto, 1. V. 1943, Takeuchi (Fig. 10F); 1♀, “Koganedake” (probably Mt. Koganegadake, Hyogo Pref.), 27. IV. 1961, T. Naito (Figs 8Y, 9L).
Etymology. The specific name is an adjective, meaning yellow-striped, and comes from the yellow lateral stripe of the abdomen.
Distribution. Japan (Honshu).
Life history. Host plants: Fagaceae: Quercus acutissima Carruth.
This species has univoltine life cycle and adults occur in early spring. A solitary larva was collected on middle May. It matured on late May and made a cocoon in the soil under rearing condition.
Remarks. Fagineura fulvistriata is similar to F. togashii and F. flavomaculata in color, but it is distinguished from them as stated in the key. For more differences from F. togashii, see the remarks of that species. The additional differences of F. fulvistriata from F. flavomaculata are the yellow postocellar area (Fig. 6H) and the entirely black mesepisternum except for the epicnemium (Figs 4C, 8J). The latter species has the mostly black postocellar area (Fig. 6I) and the dorsally widely pale mesepisternum (Figs 4H, N, 8K). The larva of this species is very similar to that of F. flavomaculata, but may be distinguished from the latter in having the unbroken supraspiracular stripe (Figs 4L, M) (the latter has the posteriorly broken supraspiracular stripe; Figs 4O–Q).
description: Published as part of Hara, Hideho & Ibuki, Shinichi, 2022, A study of the genus Fagineura (Hymenoptera, Tenthredinidae, Nematinae), pp. 223-252 in Zootaxa 5116 (2) on pages 236-237, DOI: 10.11646/zootaxa.5116.2.3, http://zenodo.org/record/6367255