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Review of the Macrophya Regia Group (Hymenoptera: Tenthredinidae

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Review of the Macrophya Regia Group (Hymenoptera: Tenthredinidae Entomological Research 48 (2018) 405–415 RESEARCH PAPER Review of the Macrophya regia group (Hymenoptera: Tenthredinidae) from China with the descriptions of two new species Ze-Jian LI1,3 , Meng-Meng LIU2 , Mei-Cai WEI2 and Chao-Dong ZHU1 1 Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing, China 2 Lab of Insect Systematics and Evolutionary Biology, Central South University of Forestry and Technology, Changsha, China 3 Postdoctoral Work Station, Lishui Academy of Forestry, Lishui, China Correspondence Abstract Chaodong Zhu, Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, The Macrophya regia group is reviewed and five species are recognized from China, Chinese Academy of Sciences, Beijing 100101, among them two new species, M. acutiserrula Li, Liu & Wei sp. nov. and M. China. frontalis Li, Liu & Zhu sp. nov., and three known species, M. regia Forsius 1930, Email: [email protected] M. maculoclypeatina Wei et al. 2003, and M. xiaoi Wei et al. 2003. A key to the Chinese species of the Macrophya regia group are provided. Received 26 December 2017; accepted26April2018. Key words: key, sawflies, Symphyta, taxonomy, Tenthredinoidea. doi: 10.1111/1748-5967.12309 Introduction malaisei-group; planata-group; regia-group; sanguinolenta- group; sheni-group; sibirica-group; vittata-group and Macrophya Dahlbom, 1835 (Hymenoptera, Tenthredinidae, zhaoae-group. Tenthredininae, Macrophini) is the third largest genus in In the regia group of Macrophya, three species were Tenthredininae and the fourth largest of Tenthredinidae. reported from China to date, i.e., M. regia Forsius 1930, M. The genus is chiefly distributed in the north of the Oriental, maculoclypeatina Wei et al. 2003, and M. xiaoi Wei et al. Nearctic, and Palaearctic regions. At present, 289 species 2003. In the present paper two new species of the regia group have been described by the end of 2017 (Taeger et al. of Macrophya are described and illustrated from China: M. 2010; Zhao et al. 2010a, 2010b; Zhao & Wei 2011; Li acutiserrula Li, Liu & Wei sp. nov. and M. frontalis Li, Liu et al.2012;Wuet al.2012;Zhuet al.2012;Weiet al. &Zhusp. nov.TheMacrophya regia group is proposed and 2006, 2013; Li & Wei 2012, 2013; Li et al. 2013a, defined for Chinese species, and a key to the five known 2013b, 2013c, 2014a, 2014b, 2016a, 2016b, 2017a, species of regia-group of Macrophya is provided. 2017b, 2018; Liu et al. 2015a, 2015b, 2016a, 2016b, 2017a, 2017b; Shinohara 2015; Shinohara & Li 2015; Shinohara & Yoshida 2015). In China, 150 species of Materials and methods Macrophya have been recorded. Macrophya includes 27 species groups worldwide (Li The specimens were examined with a Motic-SMZ-168 et al. 2014a, 2014b, 2018). In China, it includes 20 species dissection microscope. Adult images were taken with a groups: the annulitibia-group; apicalis-group; bland-group; Nikon D700 digital camera and a series of images coxalis-group; crassuliformis-group; duodecimpunctata- montaged using Helicon Focus (HeliconSoft, Kharkiv, group; flavomaculata-group; formosana-group; histrio- Ukraine). All images were further processed with Adobe group; imitator-group; ligustri-group; maculitibia-group; Photoshop CS 11.0. © 2018 The Entomological Society of Korea and John Wiley & Sons Australia, Ltd Z.-J. Li et al. Morphological descriptions of new species are based on the In China, the Macrophya regia species group includes three holotype. The terminology of genitalia follows Ross (1945) known species and two new species described here. They can and that of general morphology follows Viitasaari (2002). be separated using the following key. For a few terms (e.g. middle fovea and lateral fovea), we follow Takeuchi (1952). Holotypes and most paratypes of the new species are Key to species of Macrophya regia group from China deposited in the insect collection of Central South University 1 Antennomeres 5–9 strongly dilated and reduced, of Forestry and Technology, Changsha (CSCS), China. One antennomere 8 approximately 1.5 times as long as broad; paratype of M. acutiserrula Li, Liu & Wei sp. nov. is stored middle serrulae of lancet with 16–18 distal denticles usually, in the Department of Zoology, National Museum of Nature subbasal teeth small; harpe of gonoforceps broad and short, and Science, Amakubo, Tsukuba, Ibaraki (NMS), Japan. long equal to broad, inner side on base distinctly extruded roundish; ergot of penis valve long, distinctly separated from petiole of valviceps....................................................... Results ...........................................................M. regia Forsius, 1930 - Antennae slender, antennomeres 5–9 not dilated and Macrophya regia species group reduced, antennomere 8 not less than 2 times longer than broad; middle serrulae of lancet with 3–6distalteeth Diagnosis usually, subbasal teeth large; harpe of gonoforceps narrow Body mainly blue, with strongly metallic lustre, without red and long, approx. 3 times longer than broad, inner side on macula; dorsum of head, pronotum, mesonotum, base not extruded; ergot of penis valve short or lacked, mesopleuron, metapleuron, mesoscutellum, mesoscutellar indistinctly separated from petiole of valviceps................ appendage, metascutellum, metepimeral appendage, most .............................................................................................2 parts of abdominal terga and sternites blue; legs largely 2 Fore and middle trochanters largely white, ventral sides blue-black; clypeus sub-quadrate, anterior margin shallowly with distinct black maculae; ventral side of hind femur with emarginated with bottom margin arcuate; malar space distinct white band..............................................................3 slightly narrower than half diameter of middle ocellus; - Fore and middle trochanters entirely blue-black, without fronts distinctly depressed usually, densely and coarsely white macula; hind femur entirely blue-black, ventral side punctured, much below top of eyes in lateral view; occipital without white band..............................................................4 carina complete; antennae slender, weakly dilated near 3 Mesoscutellar appendage with dense punctures; middle, antennomere 3 much longer than antennomere 4; metepimeral appendage broad and long, extended toward mesoscutellum rounded elevated; mesepisternum densely back, without margin, centre of metepimeral appendage punctured; metepimeron with a distinct appendage; all with minute punctures; white band on ventral side of abdominal terga less shine, lateral sides of tergum 1 with hind femur narrow (some specimen: ventral side of hind some punctures; dorsal sides of other abdominal terga with femur without white band); ovipositor sheath slightly slightly dense and small punctures, microsculpture feeble; shorter than metabasitarsus; ergot of penis valve claw inner tooth longer than outer tooth of hind leg; low lacked.............................................M. xiaoi Wei et al. 2003 part of stigma distinctly smoky in fore wing, stigma and - Mesoscutellar appendage with sparse punctures; veins black; anal cell with a short cross vein usually; petiole metepimeral appendage small and indent, with clear margin, of anal cell in hind wing; middle serrulae of lancet long and centre of metepimeral appendage with large punctures; white oblique, weakly protruding, annular pilose bands very band on ventral side of hind femur broad and long; ovipositor narrow and remote to each other; valviceps of penis valve sheath longer than metabasitarsus; ergot of penis valve short, short and broad usually. slightly separated from petiole of valviceps...................... ................................M. acutiserrula Li, Liu & Wei sp. nov. Remarks 4 Labrum and clypeus largely white, margins with blue- The specific characters to the Macrophya regia species black maculae; metabasitarsus approximately 9 times group are the mainly blue lustre body, the distinct longer than broad near middle; antennomere 8 appendage of the metepimeron and the entirely blue-black approximately 2 times longer than broad................. antennae. .................................M. maculoclypeatina Wei et al. 2003 This species group is a small lineage of Macrophya and is 5 Labrum and clypeus largely blue-black, margins or centre close to the Macrophya apicalis group. It differs from the with feeble white maculae; metabasitarsus approximately Macrophya apicalis group in antennae entirely blue-black, 7 times longer than broad near middle; antennomere 8 without white macula; body mainly blue and with strongly more than 2 times longer than broad..................... metallic lustre. .................................. M. frontalis Li, Liu & Zhu sp. nov. 406 Entomological Research 48 (2018) 405–415 © 2018 The Entomological Society of Korea and John Wiley & Sons Australia, Ltd Review of the Macrophya regia group from China Taxonomy Cenwanglaoshan, Nongyanglukou, (N 24°27.750,E 106°21.530, 1523 m), 7.V.2013, CSCS13038, Mei-Cai Wei Macrophya acutiserrula Li, Liu & Wei sp. nov. and Geng-Yun Niu leg. Figure 1 Description Holotype: ♀. Body length 15.5 mm. Body and legs blue, with Type material metallic lustre; palp largely white; following parts white: basal Holotype, ♀, (CSCS) China: Guangxi Province, Tianlin 0.6 of mandibles, most of labrum except margins, clypeus, County, Mt. Cenwanglaoshan, Qixiangzhan, (N 24°25017″, outer margin of tegula, lateral sides of abdominal terga 2–5 E106°2300″,
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