Three new species of Tenthredo Linnaeus, 1758 (Hymenoptera: Tenthredinidae) from Jiangxi and Zhejiang Provinces, China Author Liu, Mengmeng College of Ecology, Lishui University, Lishui, Zhejiang, 323000, China Author Li, Zejian Postdoctoral Work Station, Scientific Research and Management Center of East China Pharmaceutical Botanical Garden, Lishui Ecological Forestry Development Center, Lishui, Zhejiang, 323000, China Author Wei, Meicai College of Life Science, Jiangxi Normal University, Nanchang, Jiangxi, 330022, China Corresponding authors, E-mails: lizejian 2006 @ 163. com; weimc @ 126. com text Zoological Systematics 2021 46 3 225 233 https://www.mendeley.com/catalogue/1ef7ead9-55a1-30b6-8f85-9954395bb434/ journal article 10.11865/zs.2021304 2095-6827 7176134 A3352844-0C1E-4475-8670-73FE1752D8E4 Tenthredo carinacestanella sp. nov. ( Figure 1A–P ) Diagnosis. This new species belongs to Tenthredo cestanella group. It is quite similar to T. nigrofrontalinia Wei, 1998 ( Wei & Nie, 1998 ) but differs from the latter by the following: the anterior parts of the supraantennal tubercles distinctly elevated, median fovea deep; in dorsal view the female head behind eyes dilated in anterior half; the black macula on dorsum of head large and almost touching eyes; the mesepisternum with a short but distinct middle oblique carina; the female serrulae flat; harpes of male longer than broad and the valviceps of penis valve narrow and curved. In T. nigrofrontalinia Wei , the anterior of the supraantennal tubercles very low and faintly elevated, median fovea shallow; in dorsal view the female head behind eyes not dilated in anterior half; the black macula on dorsum of head remote from eyes; the mesepisternum with a small middle peak but without oblique carina; the female serrulae quite oblique; harpes of male broader than long and the penis valve with a long apical filament. Description. Female. Holotype . Body length 14.0 mm; body mostly yellowish brown, head and thorax with faint greenish tinge, dorsum of abdominal tergites 2–8 brown; dorsum of head with a large black macula covering frons, ocelli, most of upper inner orbit, inner triangle of temple and postocellar furrow; antenna black with scape yellow; anterior lobes of mesonotum with a long and broad stripe, lateral lobes of mesonotum with a long triangular macula, a large and a small macula on dorsum of lateral lobe, bottom of parapsis, narrow posterior margin of metapostnotum, anterior margin and a small lateral spot of abdominal tergum 1, narrow basal stripe on tergum 2 black ( Fig. 1A ). Legs yellowish brown. Wings hyaline, forewing with veins C, Sc, base of M+Cu, base of vein 1A, pterostigma, hindwing with veins C, base of M+Cu, bases of 1A and 2A yellowish brown, other veins mostly blackish brown. Body hairs pale yellowish brown, but hairs on dorsum of head and thorax, and flagellomeres black ( Fig. 1A ). Head and thorax slightly shiny, without clear puncture ( Fig. 1C ); labrum and clypeus shiny, without puncture or microsculpture ( Fig. 1D ); dorsum of head and thorax, and mesopleuron with very weak microsculptures; mesonotum, mesopleuron and abdominal terga with oil lustre; malar space with clear microsculptures; abdominal terga slightly shiny, with weak microsculptures. Clypeus large and flat, anterior margin shallowly incised to 1/8 length of clypeus ( Fig. 1D ); malar space 1.5× as broad as diameter of median ocellus; supraantennal tubercles clearly elevated and confluent with frontal ridges; inner margin of eyes distinctly convergent downwards, shortest distance between them 1.1× as broad as longest axis of eyes (10: 9.7); median fovea broad and deep, bottom flat, lateral foveae shallow; interocellar and postocellar furrows clear, POL: OOL: OOCL = 1.6: 7: 5; postocellar area weakly elevated, 1.3× as broad as long (6.5: 5), lateral furrows deep, faintly curved; in dorsal view head behind eyes roundly curved, dilated at anterior half, posterior half distinctly narrowed ( Fig. 1C ). Antenna 1.1× length of head and thorax together (9: 8.4), 0.8× length of abdomen (9: 11), antennomere 3 1.3× length of antennomere 4 (9.6: 7.2), ratio of antennomeres 5–9 as 5.5: 4.5: 3.5: 3: 2.5 ( Fig. 1E ). Mesoscutellum strongly elevated, with an acute apex ( Fig. 1F ), mesoscutellar appendage smooth, with weak middle carina; median of mesepisternum strongly elevated with a short but distinct oblique carina, ventral thorn distinct ( Fig. 1G ); distance between cenchri 2× breadth of a cenchrus. Hind tibia 0.9× length of hind tarsus (35: 38), inner spur of hind tibia 0.5× length of metabasitarsus (18: 35); metabasitarsus slender, 0.7× length of following 4 tarsomeres together (15: 23); claw with inner tooth broader and longer than outer tooth. Ovipositor sheath slightly longer than metabasitarsus, valvula 3 clearly longer than valvifer 2 (11.8: 8); dorsal apical corner of valvula 3 distinct in lateral view ( Fig. 1H ), lateral setae short and straight in dorsal view ( Fig. 1I ). Forewing with vein cu-a joining cell 1M at basal 1/4, vein 2r joining cell 2Rs at apical 2/5, cell 2Rs slightly length of cell 1R 1 and cell 1Rs together; hindwing with anal cell sessile ( Fig. 1A ). Lancet narrow with 21 serrulae ( Fig. 1J ), serrulae almost flat, middle serrulae each with 1– 2 proximal and 16–18 distal minute teeth, 5th–8th serrulae from base as Fig. 1K . Male. Body length 12.0 mm ( Fig. 1B ); posterior of middle and hind femora with broad black stripe; postocellar area 1.7× as broad as long (6: 3.6), dorsal view of head distinctly narrowed behind eyes ( Fig. 1L ); lateral view of antenna as shown in Fig. 1M ; apical margin of subgenital plate subtruncate ( Fig. 1N ); penis valve long and narrow, valviceps narrow and strongly curved ( Fig. 1O ); gonoforceps as Fig. 1P , harpe longer than broad, apical margin round. Figure 1. Tenthredo carinacestanella sp. nov. A. Female, dorsal view; B. Male, dorsal view; C. Head of female, dorsal view; D. Head of female, anterior view; E. Antenna of female, lateral view; F. Mesoscutellum of female, lateral view; G. Mesopleuron and metapleuron of female; H. Ovipositor sheath, lateral view; I. Ovipositor sheath, dorsal view; J. Lancet; K. The 5th–8th serrulae; L. Head of male, dorsal view; M. Antenna of male, lateral view; N. Subgenital plate of male, ventral side; O. Penis valve; P. Gonoforceps. A, C–K. Holotype; B, L–P. Paratype. Scale bars: A–B = 2.0 mm; J, O–P =200 µm; K =100 µm. Material examined. Holotype . ♀ , LSAF17034 , China , Zhejiang , Lin’an District , Mt. Tianmu , Kaishanlaodian ( 30.343°N , 119.433°E , elev. 1106 m ), 14 April 2017 , leg. Mengmeng Liu , Kaiwen Gao & Tingting Ji. Paratypes . 13♀ 23♂ , LSAF17034 , same data as holotype ; 5♀ 14♂ , LSAF14007 , China , Zhejiang , Lin’an District , Mt. Tianmu , Kaishanlaodian ( 30.34°N , 119.43°E , elev. 1140 m ), 9–10 April 2014 , leg. Zejian Li ; 8♀ 12♂ , LSAF15022 , LSAF15024 , China , Zhejiang , Lin’an District , Mt. Tianmu , Kaishanlaodian ( 30.343°N , 119.433°E , elev. 1106 m ), 5–11 April 2015 , leg. Zejian Li ; 6♀ , LSAF16143 , LSAF16153 , China , Zhejiang , Lin’an District , Mt. Tianmu , Kaishanlaodian ( 30.343°N , 119.433°E , elev. 1106 m ), 14 April–4 May 2016 , leg. Zejian Li , Mengmeng Liu & Zhiwei Chen ; 51♀ 57♂ , LSAF17036 , LSAF17040 , LSAF17049 , LSAF17053 , China , Zhejiang , Lin’an District , Mt. Tianmu , Kaishanlaodian ( 30.343°N , 119.433°E , elev. 1106 m ), 15–29 April 2017 , leg. Mengmeng Liu , Kaiwen Gao & Tingting Ji ; 1♀ 1♂ , LSAF18009 , LSAF18014 , China , Zhejiang , Lin’an District , Mt. Tianmu , Kaishanlaodian ( 30.343°N , 119.433°E , elev. 1106 m ), 31 March–6 April 2018 , leg. Mengmeng Liu , Kaiwen Gao & Tingting Ji ; 2♀ , LSAF19009 , China , Zhejiang , Lin’an District , Mt. Tianmu , Kaishanlaodian ( 30.343°N , 119.443°E , elev. 1106 m ), 6–7 April 2019 , leg. Zejian Li & Xiufang Li ; 3♀ , LSAF16144 , LSAF16146 , China , Zhejiang , Lin’an District , Mt. Tianmu , Chanyuan Temple ( 30.323ºN , 119.442ºE , elev. 405 m ), 15–17 April 2016 , leg. Zejian Li , Mengmeng Liu & Zhiwei Chen ; 2♀ 4♂ , LSAF17024 , LSAF17035 , LSAF17038 , LSAF17050 , China , Zhejiang , Lin’an District , Mt. Tianmu , Chanyuan Temple ( 30.323ºN , 119.442ºE , elev. 405 m ), 6–25 April 2017 , leg. Zejian Li , Mengmeng Liu & Tingting Ji ; 5♀ 36♂ , LSAF18005 – LSAF18006 , LSAF18011 – LSAF18013 , LSAF18018 , LSAF18031 , China , Zhejiang , Lin’an District , Mt. Tianmu , Chanyuan Temple ( 30.323ºN , 119.442ºE , elev. 405 m ), 29 March–20 April 2018 , leg. Zejian Li , Mengmeng Liu , Kaiwen Gao & Tingting Ji ; 1♀ , LSAF19021 , China , Zhejiang , Lin’an District , Mt. Tianmu , Chanyuan Temple ( 30.322ºN , 119.443ºE , elev. 362 m ), 4 May 2019 , leg. Zejian Li , Xiufang Li & Tingting Ji ; 1♂ , LSAF16156 , China , Zhejiang , Lin’an District , Mt. Tianmu , Xianrending ( 30.349°N , 119.424°E , elev. 1506 m ), 29 May 2016 , leg. Zejian Li & Mengmeng Liu ; 14♀ , LSAF17054 , China , Zhejiang , Lin’an District , Mt. Tianmu , Xianrending ( 30.349°N , 119.424°E , elev. 1506 m ), 28–29 April 2017 , leg. Zejian Li , Mengmeng Liu , Kaiwen Gao & Tingting Ji ; 3♂ , LSAF18036 , LSAF18046 , LSAF18048 , China , Zhejiang , Lin’an District , Mt. Tianmu , Xianrending ( 30.349°N , 119.424°E , elev. 1506 m ), 11 May–1 June 2018 , leg. Zejian Li , Mengmeng Liu & Tingting Ji ; 3♂ , LSAF19023 , China , Zhejiang , Lin’an District , Mt. Tianmu , Xianrending ( 30.350°N , 119.424°E , elev. 1506 m ), 3 May 2019 , leg. Zejian Li. Variety. Female body length 13.5–14.5 mm ; male body length 11.0–12.0 mm. Etymology. The specific epithet, a noun, is composed of “ carina- ” referring to the oblique carina on the mesepisternum and “ cestanella ”, a similar species of Tenthredo . Distribution. China ( Zhejiang ).