Fagineura parva 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 parva

description: Fagineura parva Hara, sp. nov.
(Figs 2A–F, 6D, E, Q, 7E, K, 8H, P, 9B, J, 10C, 11C, 14B, G, H, M, N)
Fagineura crenativora: Shinohara et al. 2000: 115 (part). Not Vikberg & Zinovjev, 2000.
Description: female (holotype). Length 5.5 mm. Black (Figs 2A–C). Dorsal part of facial orbit, lateral part of vertex, gena and malar space dark yellow (Figs 6D, Q, 7E, K). Supraclypeal area ventrally dark brown. Clypeus and labrum yellow. Mandible yellow, apically reddish brown. Palpi yellow. Wide posterolateral part of pronotum, tegula and postspiracular sclerite yellow. Epicnemium and central part of mesepisternum dark brown. Legs yellow (Fig. 2C); coxae black laterobasally. Wings clear transparent; veins and stigma yellow brown (Fig. 2B). Abdomen ventrally brownish yellow. Cercus pale yellow (Figs 9B, J). Ovipositor sheath yellow, apically brownish.
Head in dorsal view with length behind eye 0.5 × eye length (Fig. 6D); length behind lateral ocellus 2.3 × length of lateral ocellus; OOL:POL:OOCL 1.2:1.0:0.9. Frontal area with lateral and anterior margins very slightly ridged (Fig. 6Q); frontal field very slightly convex centrally and laterally. Distance between eyes at anterior tentorial pit 1.3 × major axis of eye (Fig. 2A). Inner edges of eyes slightly converging below. Malar space 0.6 × as long as median ocellus width. Antenna 2.4 × as long as head width; flagellum barely tapered (Fig. 2C); flagellomere 1 0.8 × as long as major axis of eye; flagellomere 2 1.3 × as long as flagellomere 1. Mesepisternum slightly expanded beside postspiracular sclerite as in Fig. 8H. Hind tibia with posterior spur 1.3 × as long as apical breadth of tibia in lateral view.
Cercus about 6 × as long as wide (Figs 9B, J). Valvula 3 in dorsal view slightly wider than cercus, apically concave, in lateral view with apex rounded, dorsal edge slightly rounded and ventral edge rounded. Lance with dorsal edge slightly rounded apically (Fig. 10C). Lancet with radix 0.9 × as long as lamnium (Fig. 11C); tangium without pore; sclerotized band before lamnium poorly developed, very narrow and dorsally widely separated from olistheter; lamnium with 15 annuli; annuli arched; annulus 1 with short ctenidium; ctenidia except for those of annulus 1 and some apical annuli consisting of some irregular transverse rows of setae and markedly expanded dorsally; middle ctenidia dorsally almost in contact with neighboring ctenidia; basal and middle ctenidia ventrally widely separated from serrulae.
Head and thorax with punctures inconspicuous or minute; interspaces between punctures generally smooth. Posterolateral hollow of mesoscutum inconspicuously microsculptured, nearly smooth. Mesopostnotum with rugose and granular microsculpture, medially smooth. Metapostnotum mostly smooth. Postspiracular sclerite with many setae. Mesepisternum not glabrous beside postspiracular sclerite as in Fig. 8H. Katepimeron with group of a few setae dorsally, a few setae along posterior margin and no or one seta on ventral part. Abdomen microsculptured imbricately, with punctures inconspicuous.
Male. Length 5.0 mm. Differing from female as follows except for usual sexual differences. Facial orbit and gena entirely black (Figs 2D–F, 6E). Thorax black, only with narrow posterolateral part of pronotum and tegula dark yellow. Legs with coxae widely black basally; trochantelli and hind trochanter partly black respectively.
Head in dorsal view with length behind eye 0.3 × eye length (Fig. 6E); length behind lateral ocellus 1.4 × length of lateral ocellus; OOL:POL:OOCL 1.2:1.0:0.8. Distance between eyes at anterior tentorial pit 1.2 × major axis of eye. Malar space 0.3 × as long as median ocellus width. Antenna 2.6 × as long as head width (Fig. 2E); flagellomere 1 0.9 × as long as major axis of eye; flagellomere 2 1.2 × as long as flagellomere 1.
Subgenital plate in ventral view tapered, apically narrowly rounded. Genitalia (Figs 14G, H, M, N): parapennis pointed apically, with medial edge straight; harpe longer than wide, wider than apex of basiparamere, with medial edge distinctly convex near middle and distinctly concave near base, lateral edge gently rounded, and apex rounded; penis valve with paravalva large and expanded, without distinct spinules (Figs 14M, N); valvispina directed posteroventrally.
Material examined. Holotype: ♀, “ Ômi, Ôhara, Kyoto Pref., 15. V. 1984, R. Inagawa” “ Paratypus Fagineura crenativora ♀ Vikberg, Zinovjev ” (Figs 2A–C, 6D, Q, 7E, K, 8P, 9B, J, 10C, 11C). Paratype: 1♂, “[JAPAN: Shikoku] Nanokawagoe, 1450m, 33°45’N 133°09’E, Ishizuchiyama Mts., Ehime Pref., 9. V. 2005, A. Shinohara ” (Figs 2D–F, 6E, 8H, 14B, G, H, M, N).
Distribution. Japan (Honshu, Shikoku).
Etymology. The specific name is an adjective, meaning small, and comes from the small size.
Life history. The adults of F. parva were collected in spring. The holotype of F. parva and six female paratypes of F. crenativora were collected at the same site on the same day (see the material examined of these species). This fact may suggest that F. parva is associated with Fagus as F. crenativora.
Remarks. Fagineura parva is very similar to Chinese F. flactoserrula but distinguished from it as stated in the key above.
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 231-233, DOI: 10.11646/zootaxa.5116.2.3, http://zenodo.org/record/6367255