Research Article |
Corresponding author: Zejian Li ( lizejian2006@163.com ) Corresponding author: Meicai Wei ( weimc@126.com ) Academic editor: Andreas Müller
© 2020 Mengmeng Liu, Zejian Li, Meicai Wei.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Liu M, Li Z, Wei M (2020) Key to the Macrophya zhaoae group (Hymenoptera, Tenthredinidae) with description of a new species from China. Alpine Entomology 4: 65-72. https://doi.org/10.3897/alpento.4.48232
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The Macrophya zhaoae group is reviewed and five species are recognized in China, including a newly described species, M. lishuii Li, Liu & Wei sp. nov. from Zhejiang Province, and four previously known species, M. hainanensis Wei & Nie, 2002, M. minutitheca Wei & Nie, 2002, M. nigrospuralina Wei, 2005 and M. zhaoae Wei, 1997. A key to all Chinese species and a distribution map of the M. zhaoae group in China are provided.
Hymenoptera, Macrophya zhaoae group, sawflies, taxonomy, Tenthredinoidea
Macrophya Dahlbom, 1835 is the third largest genus in the subfamily Tenthredininae (Hymenoptera, Tenthredinidae). It contains 309 species worldwide, of which 170 have been recorded in China up to December 2019 (
The Macrophya zhaoae group is a small species group in Macrophya, with four extant species worldwide, all of which are present in China. Among them, M. hainanensis Wei & Nie, 2002 from Hainan Province (
The specimens of the newly described species were obtained by sweeping in forest fringe zones in Zhejiang Province at Mt. Jiulong (Eastern China) in May 2019. The Mt. Jiulong (28°23.640'N, 118°50.700'E) reaching 1724 meters above sea level is the fourth highest mountain in Zhejiang Province and belongs to the Wuyi mountain system. Three specimens of the new species and seven specimens of other species of the Macrophya zhaoae group were examined and studied for this work. The specimens were examined with a Motic-SMZ-171 stereomicroscope. Images of the imagines were taken with a Nikon D700 digital camera and a Leica Z16APO. The genitalia were examined with a Motic BA410E microscope and photographed with Motic Moticam Pro 285A. Images were focus-stacked using Helicon Focus (HeliconSoft, Kharkiv, Ukraine) and further processed with Adobe Photoshop CS 11.0.
The terminology of genitalia follows
The specimens of four known species examined in this study are deposited in the Insect Collection of Central South University of Forestry and Technology, Changsha, Hunan, China (CSCS). The holotype is deposited in the Scientific Research and Management Center of East China Pharmaceutical Botanical Garden, Lishui, Zhejiang, China (formerly Lishui Academy of Forestry, LSAF).
OOCL The distance between a lateral ocellus and the occipital carina, or the hind margin of the head where this carina would be if it was developed (Benson, 1954).
OOL The shortest distance between an eye and a lateral ocellus.
POL The distance between the mesal margins of the two lateral ocelli.
The Macrophya zhaoae group is a small species group, well defined by morphological characters within Macrophya. A diagnosis of the M. zhaoae group including body length, body color, morphological characters of body parts and external genitalia was provided by
Body mainly black. The following parts are always yellowish-white: palps mostly, center of mandibles, labrum, clypeus, postocellar area, antennomeres 7–9 at least, posterior margin and large maculae on lateral corners of pronotum, apical margin of tegula at least, double triangular maculae on bottom of prescutum, lateral round maculae on mesoscutellum, post tergite mostly, cenchrus, narrow macula on posterior margin of anepimeron, a large macula of katepimeron and a row of lateral maculae on abdominal terga 1–7 (8). Legs mostly orange-brown, parts black. Body hairs dense and short, mostly silver; setae on ovipositor sheath curved and long, blackish-brown. Wings hyaline, most veins and pterostigma blackish-brown. Vertex more or less shiny. Labrum elevated medially, anterior margin slightly truncate; clypeus roundly elevated, base clearly broader than distance between lower corners of eyes, lateral sides distinctly convergent apically, anterior margin shallowly incised to approximately 1/4–1/3 of its length, lateral corners somewhat short and broad, apical margins of lobe obtuse; malar space linear, approximately 0.5× breadth of diameter of middle ocellus; frontal area and face clearly depressed, lower than top of upper margin of compound eye in lateral view; head narrowed behind eyes in dorsal view, occipital carina complete. Antenna slender, middle antennomeres more or less inflated. Mesoscutellum elevated, higher than top of mesonotum in lateral view; posterodorsal platform of mesepimeron as broad as diameter of middle ocellus; metepimeronal appendage with a small platform-shaped area; distance between cenchri 2.5×–3.0× breadth of a cenchrus. Inner tibial spur of hind leg approximately 0.6× length of metabasitarsus, claw with inner tooth slightly longer and clearly broader than outer tooth. Ovipositor sheath shorter than metabasitarsus, setae on ovipositor sheath curved and long in dorsal view, apical margin roundish in lateral view. Fore wing with cross-vein cu-a joining cell 1M in basal 1/3–2/5, petiole of anal cell slightly shorter than cross-vein 1r-m; petiole of anal cell in hind wing 1/4–2/5 length of cross-vein cu-a.
In China, the Macrophya zhaoae group includes a new species from Zhejiang Province described here (the collection site of the new species at Mt. Jiulong is shown in Figure
1 | Body length 10–11 mm; mesoscutellum with sparse large punctures, center with complete and long black stripe in longitudinal direction; hind femur and apex of hind tibia with black maculae; below pterostigma in apical 1/3 of fore wing with smoky macula; middle serrulae with minute teeth. China (Hubei, Zhejiang) | M. zhaoae Wei, 1997 |
– | Body length 13–15 mm; other characters not different from the former | 2 |
2 | Hind femur mostly orange-brown, apex with distinct black maculae | 3 |
– | Hind femur entirely orange-brown | 4 |
3 | Center of mesepisternum with large white macula; basal half of hind coxa black, apical half yellowish-brown; anal petiole in fore wing shrinked as long spot-shaped; ovipositor sheath as long as metabasitarsus. China (Hainan) | M. hainanensis Wei & Nie, 2002 |
– | Mesepisternum entirely black; basal margin of metabasitarsus black, otherwise pale yellowish-brown; anal petiole in fore wing long; ovipositor sheath as long as 0.5× length of metabasitarsus. China (Guizhou) | M. minutitheca Wei & Nie, 2002 |
4 | Apical antennomeres 7–9 of antenna entirely yellowish-white; center of mesoscutellum with complete and long black stripe in longitudinal direction; hind femur mostly orange-brown, apex on dorsal surface with small macula; apex of fore coxa, apical 2/5 of middle coxa and apex of hind coxa with yellowish-white maculae; posterior margins of all abdominal terga with weak maculae, but not yellowish-white; lancet with 18 serrulae, roundishly protruding, subbasal teeth minute, without proximal or distal teeth. China (Guizhou, Hubei) | M. nigrospuralina Wei, 2005 |
– | Apical antennomeres 6–9 of antenna entirely yellowish-white (Figure |
M. lishuii Li, Liu & Wei, sp. nov. |
Macrophya hainanensis Wei & Nie, 2002. Forest Insects of Hainan, 837. Type locality: China: Hainan.
The species is morphologically similar to M. minutitheca, i.e. the center of mesepisternum with large white macula; basal half of hind coxa black, apical half yellowish-brown; anal petiole in fore wing shrinked as long spot-shaped; sheath as long as metabasitarsus.
Holotype. ♀, China, Hainan Province, Mt. Jianfengling, Meicai Wei & Haiyan Nie leg.
Unknown.
China (Hainan).
China: Zhejiang.
Holotype. ♀ (LSAF19027), China, Zhejiang Province, Lishui City, Suichang County, Mt. Jiulong, Jiulong Hotel, 28°23.640'N, 118°50.700'E, alt. 482 m, 24.V.2019, Zejian Li leg., ethylacetate; Paratypes. 2♀, same date as holotype.
The new species is similar to M. nigrospuralina in external morphological characters, i.e. the apical antennomeres 6–9 of antenna entirely yellowish-white; hind femur entirely orange-brown; apical parts of fore and middle coxae and apical 1/3 of hind coxa with yellowish-white maculae; posterior margins of abdominal terga 1–8 with long maculae, distinct yellowish-white; lancet with 20 serrulae, sub-triangularly protruding, middle serrulae with 1 proximal and 3–6 distal teeth.
Macrophya lishuii sp. nov., ♀, holotype. a. Female adult, dorsal view; b. Female adult, lateral view; c. Head of female, dorsal view; d. Head of female, frontal view; e. Mesopleuron and metapleuron of female; f. Antenna of female, lateral view; g. Ovipositor sheath, lateral view; h. Abdomen, lateral view; i. Hind tarsus and claw of female, lateral view; j. Lancet; k. The 7th–9th serrulae. Scale bars: 2 mm (a); 200 µm (j); 50 µm (k).
Female. Body length 15 mm. Body mostly black. The following parts are yellowish-white: palp mostly, center of mandibles, labrum, clypeus, postocellar area, narrow macula on outer margin of eyes, antennomeres 6–9 except base of antennomere 6 with some black macula, posterior margin and large maculae on lateral corners of pronotum, apical half of tegula, double triangular maculae on bottom of prescutum, lateral round maculae on mesoscutellum, post tergite mostly, metascutellum except a black macula, cenchrus, narrow macula on posterior margin of anepimeron, a large macula of katepimeron, narrow macula on posterior margin and a small macula on posterior corner of metepimeron, a row of lateral maculae on abdominal terga 1–8 (the widest macula of abdominal tergum 1, the narrowest macula of abdominal tergum 8), posterior margins of abdominal terga 1–8 with long maculae (macula full between posterior margins and lateral maculae of abdominal terga 1–2, the narrowest macula with long macula of abdominal tergum 8), long triangular macula on posterior margin of abdominal tergum 10. Legs mostly orange-brown; fore and middle coxae except bases with black maculae, apical 1/3 and outer surface with an oval macula of hind coxa and all trochanters yellowish-white; apical dorsum of hind femur, apical parts of hind tibia (black macula on inner surface 1/4 length of hind tibia) and claw of hind tibia black. Body hairs dense and short, mostly silver; setae on ovipositor sheath curved and long, blackish-brown. Wings hyaline, apical 1/3 of fore wing smoky roundishly below pterostigma, most veins and pterostigma blackish-brown. (Figure
Vertex less shiny than in M. nigrospuralina; frontal area shallowly and sparsely punctured, smooth interspaces distinct and smooth, microsculpture weak (Figure
Labrum elevated medially, anterior margin slightly truncate; clypeus roundishly elevated, base clearly broader than distance between lower corners of eyes, lateral sides distinctly convergent apically, anterior margin shallowly incised to approximately 1/4 of its length, lateral corners somewhat short and broad, margins of lobe obtuse (Figure
Male. Unknown.
Unknown.
China (Zhejiang).
The specific name “lishuii” is derived from Lishui City belonging to Zhejiang Province where the holotype specimen was collected.
Macrophya minutitheca Wei & Nie, 2002. Insects from Maolan Landscape, 479. Type locality: China: Guizhou.
This species is morphologically similar to M. hainanensis, i.e. the mesepisternum entirely black; basal margin of metabasitarsus black, otherwise pale yellowish-brown; anal petiole in fore wing long; sheath 0.5× length of metabasitarsus.
Holotype. ♀, China, Guizhou, Mt. Maolan, alt. 750 m, 10.V.1999, Meicai Wei leg.; Paratypes. 6♀2♂, China, Guizhou, Mt. Maolan, alt. 750 m, 10–11.V.1999, Meicai Wei leg.; 2♀, China, Guizhou, Mt. Sanchahe, alt. 750 m, 11.V.1999, Meicai Wei leg.
Unknown.
China (Guizhou).
Macrophya nigrispuralina Wei, 2005. Insects from Xishui Landscape, 480. Type locality: China: Guizhou.
This species is morphologically similar to M. lishuii, i.e. the apical antennomeres 7–9 of antenna entirely yellowish-white; center mesoscutellum with complete and long black stripe in longitudinal direction; hind femur mostly orange-brown, apex on dorsal surface with small macula; apex of fore coxa, apical 2/5 of middle coxa and apex of hind coxa with yellowish-white maculae; posterior margins of all abdominal terga with weak maculae, but not yellowish-white; lancet with 18 serrulae, roundishly protruding, subbasal teeth minute, without proximal or distal teeth.
Holotype. ♀, China, Guizhou, Xishui County, Mt. Pingjiang-Linjiang, alt. 1500–1800 m, 2.VI.2000, Wei Xiao leg.; Paratypes. 3♀, same date as holotype.
1♀, China, Hubei, Mt. Shennongjia, Mt. Guanmen, 31°26.781'N, 110°23.373'E, alt. 1241 m,13.VII.2008,Fu Zhao leg.
Unknown.
Unknown.
China (Guizhou, Hubei).
Macrophya zhaoae Wei, 1997. Entomotaxonomia, 19, Suppl., 81. Type locality: China: Zhejiang.
This species is smaller than the other species in general morphological characters, i.e. the body length 10–11 mm; mesoscutellum with sparse large punctures, center with complete and long black stripe in longitudinal direction; hind femur and apex of hind tibia with black maculae; below pterostigma in apical 1/3 of fore wing with smoky macula; middle serrulae with minute teeth.
Holotype. ♀, China, Zhejiang, Mt. Tianmu, VI.1985, Hong Wu leg.; Paratype. 1♂, China, Zhejiang, Mt. Tianmu, Xianrending, 2.VI.1990.
1♀, China, Hubei, Yichang City, Dalaoling Forest Farm, 26.VII.2010, Hongquan Chen leg.
Unknown.
China (Hubei, Zhejiang).
The Macrophya zhaoae group is the second smallest among the defined species groups of Macrophya Dahlbom, 1835 in terms of number of species. At present, five Chinese species belong to this group, including a new species described in this study from Zhejiang Province: M. hainanensis Wei & Nie, 2002, M. lishuii Li, Liu & Wei sp. nov., M. minutitheca Wei & Nie, 2002, M. nigrospuralina Wei, 2005 and M. zhaoae Wei, 1997. The included key and the distribution map of the M. zhaoae group (Figure
As we know, the host plants of Macrophya species add up to six families and nine genera, and belong to Begoniaceae (Begonia), Caprifoliaceae (Lonicera, Sambucus), Euphorbiaceae (Euphorbia), Geraniaceae (Geranium, Pelargonium), Oleaceae (Fraxinus, Ligustrum) and Verbenaceae (Clerodendrum) (
The authors are deeply grateful to the anonymous referees for valuable comments and suggestions. This research was partly supported by the Zhejiang Provincial Natural Science Foundation of China (grant No. LY18C040001) and the National Natural Science Foundation of China (grant No. 31672344).