A New Species of Nematus Panzer (Hymenoptera: Tenthredinidae), a Defoliator of Quercus variabilis in Beijing, China

被引：0
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作者：
Liu M. [1 ,3 ]
Yu G. [2 ]
Li Z. [3 ]
Wang K. [1 ]
Wei M. [4 ]
机构：
[1] College of Ecology, Lishui University, Lishui
[2] Institute of Plant Protection, Beijing Academy of Agricultural and Forestry Sciences, Beijing
[3] Provincial Postdoctoral Research Station, Scientific Research and Management Center of East China Medicinal Botanical Garden, Lishui Forestry Bureau, Lishui
[4] College of Life Sciences, Jiangxi Normal University, Nanchang
来源：
Linye Kexue/Scientia Silvae Sinicae | 2023年 / 59卷 / 02期
关键词：
China; Nematinae; Nematini; Quercus variabilis;
D O I：
10.11707/j.1001-7488.LYKX20220114
中图分类号：
学科分类号：
摘要：
This paper describes a new species of the genus Nematus (Hymenoptera: Tenthredinidae), Nematus maculostigmatus Liu & Wei, sp. nov. The insect is collected from Pinggu District, Beijing, where its larvae feed on leaves of Quercus variabilis and even can defoliate entire tree leaves at high densities. Recurrent defoliation can cause major dieback. The new species is similar to N. princeps Zaddach, 1876, but can be distinguished from the latter by the following characters: labrum, tegula, large stripe on dorsal side of fore and middle femora, spot of hind femur, except apical 1/5 on dorsal side of fore and middle tibiae, basal 2/3 of hind tibia, whole tergum 1, and most parts of tergum 2 yellow; malar space 0.5 times as long as diameter of median ocellus; ovipositor sheath 1.3 times as long as front tibia; each middle serrula of lancet with 4–6 distal teeth; annular suture 1 oblique to apex, 2nd–15th sutures with setae bands, longest setae band about 3/5 length of annulus; radix 0.7 times as long as lamnium; valvispina of penis valve obliqued distinctly. N. princeps Zaddach, 1876 is recognized as follow: labrum and part of tegula dark brown; femora and tibiae of fore and middle legs, except apical margins of each tarsomere of fore and middle tarsi, basal 1/3 of hind femur reddish yellow; most parts of terga 3–4 yellow; malar space 1.5 times as long as diameter of median ocellus; ovipositor sheath 0.8 times as long as front tibia; each middle serrula of lancet with 9–12 distal teeth; annular suture 1 not obliqued; 2nd–13th sutures with setae bands, longest setae band about 1/3 length of annulus; radix 0.9 times as long as lamnium; valvispina of penis valve not obliqued, ventral side of apex with a protrusion. The genomic DNA of the new species was extracted by using the DNeasy Tissue Kit (Qiagen, Valencia, CA), sequence of the mitochondrial gene Cytochrome oxidase Ⅰ (COⅠ) were obtained from sequencing, with 810 bp in length; another 14 COⅠ sequences of known Nematus and Pristiphora species used in previous phylogenetic analyses were downloaded from GenBank, and formed the CO I sequence data set with the new species sequence. The results of Kimura 2-parameter model distance of the 12 Nematus COⅠ sequences showed that the K2P distance between N. maculostigmatus and N. princeps was the smallest, 0.116. Phylogenetic tree of Nematus and related genus species based on Bayesian phylogenetic analysis of COⅠ sequences was constructed, and the results showed that all the Nematus species formed a monophyletic group, including the new species. The holotype and all paratypes of the new species were deposited in the Asian Sawfly Museum, Nanchang, China (ASMN). © 2023 Chinese Society of Forestry. All rights reserved.
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页码：58 / 111
页数：53
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