危害栓皮栎的中国突瓣叶蜂属（膜翅目：叶蜂科）一新种

doi:10.11707/j.1001-7488.LYKX20220114

Abstract

Abstract:

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, 2^nd–15^th 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; 2^nd–13^th 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).

Key words: Nematinae, Nematini, Quercus variabilis, China

CLC Number:

S718.7

Mengmeng Liu,Guoyue Yu,Zejian Li,Kai Wang,Meicai Wei. A New Species of Nematus Panzer (Hymenoptera: Tenthredinidae), a Defoliator of Quercus variabilis in Beijing, China[J]. Scientia Silvae Sinicae, 2023, 59(2): 107-111.

Figures/Tables 5

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References 0

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种名 Species	K2P距离和标准差 K2P distance and standard deviation
斑痣突瓣叶蜂N. maculostigmatus		0.015	0.016	0.016	0.014	0.014	0.016	0.016	0.014	0.016	0.015	0.015
白榆突瓣叶蜂N. pumila	0.138		0.016	0.016	0.015	0.013	0.015	0.015	0.016	0.015	0.015	0.014
图伦突瓣叶蜂N. tulunensis	0.148	0.146		0.017	0.014	0.014	0.016	0.016	0.011	0.005	0.015	0.015
红腹突瓣叶蜂N. erythrogaster	0.152	0.134	0.158		0.016	0.015	0.013	0.016	0.017	0.016	0.014	0.016
黄环突瓣叶蜂N. princeps	0.116	0.122	0.115	0.151		0.013	0.015	0.014	0.014	0.012	0.015	0.013
红环突瓣叶蜂N. lucidus	0.119	0.106	0.118	0.127	0.106		0.015	0.015	0.012	0.013	0.015	0.014
卡氏突瓣叶蜂N. carpini	0.141	0.128	0.144	0.106	0.129	0.122		0.016	0.016	0.015	0.016	0.015
大跗突瓣叶蜂N. septentrionalis	0.145	0.127	0.145	0.153	0.117	0.129	0.140		0.016	0.015	0.011	0.005
樱桃突瓣叶蜂N. glaphyropus	0.119	0.146	0.084	0.154	0.116	0.103	0.146	0.151		0.010	0.015	0.015
沃氏突瓣叶蜂N. wahlbergi	0.136	0.132	0.023	0.153	0.100	0.104	0.126	0.138	0.068		0.014	0.015
桤木突瓣叶蜂N. alniastri	0.136	0.124	0.131	0.128	0.127	0.126	0.141	0.083	0.136	0.119		0.011
桦突瓣叶蜂N. latipes	0.138	0.122	0.142	0.151	0.112	0.124	0.129	0.019	0.145	0.138	0.080

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

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