Fagineura flavomaculata 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 flavomaculata

description: Fagineura flavomaculata Hara, sp. nov.
(Figs 4F–H, N–Q, 6I, 7G, M, 8B, K, S, 9E, M, 10G, 12D, E)
Description: female. Length 7.0– 8.5 mm (holotype 8.5 mm). Black (Figs 4F–H). Head capsule brown yellow except for medial areas of frons and vertex and occiput (Fig. 6I); postocellar area dark brown except for wide medial area and narrow lateral margin. Mandible pale yellow, with wide apex dark red brown. Palpi pale yellow. Thorax pale yellow on pronotum and tegula; mesoscutum yellow to yellow brown on anterolateral area of median lobe and usually on narrow medial area of lateral lobe; mesoscutellum usually with pair of yellow to brown spots; mesoscutellar appendage yellow except for narrow apex; metanotum yellow except for anterolateral area and medial area of metascutellum; postspiracular sclerite pale yellow grey (Fig. 8K); epicnemium dark brown, often posteriorly pale yellow; mesepisternum dorsally yellow to yellow brown and narrowly pale yellow grey beside postspiracular sclerite; katepimeron, metepimeron and dorsal area of metepisternum yellow. Legs with trochanters, trochantelli and their adjacent areas pale yellow (Fig. 4H); fore and middle femora dorsally yellow; fore and middle tibiae basally and ventrally pale yellow; hind femur dorsally yellow on basal two-thirds; hind tibia pale yellow on wide basal area; fore and middle tarsi pale yellow, sometimes dorsally darkened. Wings colorless transparent (Fig. 4G); veins brown to black, with vein C and basal part of vein A yellow; stigma yellow brown, marginally darkened. Abdomen with tergum 1 yellow on lateral and posterior areas; wide lateral areas of terga 1–8 pale yellow; narrow posteromedial parts of terga 2 or 2–4 yellow; tergum 9 brown to black, posteroventrally narrowly yellow; sterna 4–6 or 5–6 centrally yellow brown; sternum 7 with pair of yellow brown spots; valvifer 2 often dark brown.
Head in dorsal view with length behind eye 0.4–0.5 × eye length (Fig. 6I); length behind lateral ocellus 2.6–3.5 × length of lateral ocellus. OOL:POL:OOCL 0.7–0.8:1.0:1.1–1.3. Frontal area with lateral ridge distinct, sometimes very slight; frontal field with distinct or indistinct long lateral convexity. Distance between eyes at anterior tentorial pit 1.2–1.3 × major axis of eye (Fig. 4F). Inner edges of eyes nearly parallel. Malar space 0.3–0.4 × as long as median ocellus width. Antenna 2.4 × as long as head width (Fig. 4G); flagellum tapered; flagellomere 1 0.7 × as long as major axis of eye; flagellomere 2 1.1 × as long as flagellomere 1. Mesepisternum distinctly expanded beside postspiracular sclerite (Fig. 8K). Hind tibia with posterior spur 0.8–1.0 × 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, slightly or hardly concave near pointed apex (Fig. 9E), in lateral view rounded or nearly angulated apically, with dorsal edge straight and ventral edge rounded (Fig. 9M). Lance with dorsal edge slightly rounded (Fig. 10G). Lancet with radix 0.5–0.6 × as long as lamnium (Figs 12D, E); lamnium with 19–20 annuli; basal annuli slightly sinuous; middle annuli straight and erect; 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 and slightly expanded dorsally; basal serrulae with anterior slope about as long as posterior slope.
Head and thorax with punctures minute; interspaces between punctures generally smooth. Mesoscutum mostly covered with setiferous punctures (Fig. 8B); posterolateral hollow with rugose and granular microsculpture. Mesopostnotum with rugose and granular microsculpture, medially smooth. Metapostnotum mostly smooth. Postspiracular sclerite with many setae. Mesepisternum widely or narrowly glabrous beside postspiracular sclerite (Fig. 8K). Katepimeron widely covered with setae. Abdomen microsculptured imbricately, with punctures inconspicuous.
Male. Unknown.
Immature stages. Late instar larva: head black (Fig. 4O); thoracic legs pale grey, apically and basally darkened; trunk pale grey, yellow on thoracic segment 1, with black supraspiracular and pleural stripes; supraspiracular stripe broken posteriorly; pleural stripe broken throughout; setae short. Final instar larva: 20 mm long; color as in late instar, but thoracic legs mostly pale grey and abdominal segment 10 yellow; abdominal tergum 10 not darkened; setae inconspicuous; when mature, trunk yellow (Fig. 4Q).
Material examined. Holotype: ♀, “ JAPAN: Honshu, Tochigi Pref., Nakagawa, Koisago, 36°46’N 140°8’E, coll. larva on Quercus acutissima 2. V. 2018, mat. 9. V., em. 17. IV. 2019, S. Ibuki ” (Figs 4F –H, N–Q, 6I, 7G, M, 8B, K, S, 9E, 10G, 12D). Paratypes: JAPAN: HONSHU: 4♀, Okayama Pref., Soja, Minagi, coll. larvae on Quercus sp., Q. serrata, Q. acutissima 3. V. 1973, em. 4. IV. 1974, T. Kondo (Fig. 9M) ― KOREA: 1♀, Gyeonggi-do, Suwon, 25. IV. 1927, K, Sato; 1♀, same data but 5. V. 1931 (Fig. 12E).
Etymology. The specific name is an adjective, meaning yellow spotted, and comes from the yellow markings on the body.
Distribution. Japan (Honshu), Korea.
Life history. Host plants: Fagaceae: Quercus acutissima Carruth., Q. serrata Murray.
This species has one generation a year. S. Ibuki collected a solitary larva on early May. It matured a week later and made a cocoon in the soil under rearing condition. A female emerged on middle April in the next year and oviposited in a young shoot in a cage (Fig. 4N).
Remarks. Fagineura flavomaculata is similar to F. fulvistriata and F. togashii in color, but they are distinguished as stated in the key. For more their differences, see the remarks of the latter two species.
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 239-240, DOI: 10.11646/zootaxa.5116.2.3, http://zenodo.org/record/6367255