The genus Ismarus Haliday (Hymenoptera, Ismaridae) from China Zhang, Xiao Chen, Hua-yan Liu, Jing-xian Luo, Shi-xiao Journal of Hymenoptera Research 2021 2021-04-29 82 139 160 http://zoobank.org/286a8f58-8922-42a1-a4f7-d23d3ff3a0e9 Chen Chen 2021 Insecta Diapriidae Ismarus CoL Animalia Ismarus paradorsiger Hymenoptera 0 139 Arthropoda species paradorsiger sp. nov.   Figures 12 , 13 , 14  Diagnosis. This species is most similar to the widely distributed  I. dorsigerand  I. kakamegensisin size and color patterns. It can be easily separated from  I. dorsigerby the presence of a mesoscutal suprahumeral sulcus, and from  I. kakamegensisby A1, which is distinctly longer than the length of A3 and A4.   Figure 12.  Ismarus paradorsigerChen, sp. nov., holotype, female (SCAU 3042199) Alateral habitus Bhead, anterior view, arrow indicates facial transverse carina convex ventrally Chead and mesosoma, dorsal view Dhead and mesosoma, lateral view Epropodeum and basal metasoma, dorsal view Fapical metasoma, dorsal view, arrow indicates suture between T2 and T3 obsolete.  Description.  Female.Body length 1.95-2.3 mm.   Colour.Body mostly pale yellowish, except mesoscutum, scutellum, metanotum, dorsal T1 and basal T2 variably dark brown; legs pale yellow, except hind tibia and basal tarsus somewhat brown; A1-A2 brown, remainder of antenna dark brown; wings hyaline or slightly infuscate medially, veins blackish brown.   Figure 13.  Ismarus paradorsigerChen, sp. nov., holotype, female (SCAU 3042199) Awings Bantenna Chind tibia.   Head.Head in dorsal view 2.0 xas wide as long; vertex abruptly sloping behind ocelli; POL as long as OOL; frons with ventrolateral areas densely setose, area below anterior ocellus with scattered setae; facial transverse carina slightly convex ventrally; A3 slightly shorter than A4; A4 1.2 xlength of A5; A6-A14 with each segment approximately 2.0 xlonger than wide; A15 approximately 3.0 xlonger than wide.   Mesosoma.Dorsal pronotal area rugose-punctate and setose; lateral pronotal area rugose-punctate ventrally, smooth dorsally; mesoscutum smooth and bare, convex; mesoscutal suprahumeral sulcus present as six small pits; humeral sulcus deep and finely crenulate, slightly shorter than length of tegula; mesoscutellum smooth and slightly convex, posterior rim rounded; anterior mesoscutellar pit small, 0.25 xlength of the mesoscutellar disc, distinctly crenulate at bottom, median keel strong; mesopleuron smooth and bare; metapleuron rugose and covered with dense whitish long setae.   Figure 14.  Ismarus paradorsigerChen, sp. nov., paratype, female (201000305) Lateral habitus.   Wings.Radial cell completely closed, moderately large, 3.6 xas long as wide and as long as marginal vein.   Legs.Fore and mid legs slender; hind tibia abruptly incrassate, its maximum width slightly wider than hind femur.   Metasoma.Petiole distinctly transverse, with irregular longitudinal costae dorsally; base of T2 with five short costae, median furrow short, 0.1 xlength of T2, remainder of T2 smooth with scattered fine punctures; T3-T8 smooth with scattered fine punctures; suture between T2 and T3 obsolete but the following sutures between tergites distinctly impressed.  Male.Unknown.  Etymology. The name refers to the high degree of similarity with  I. dorsigerand is intended to be used as a noun in apposition.  Material examined.     Holotype,female:  China: Guangdong, Maoming, Yunkaishan National Nature Reserve, LSX704, MT-GD33, 22°17'40.72"N, 111°12'37.97"E,  1480 m, 4-30.vii.2020, Long-long Chen, SCAU 3042199 (deposited in SYSBM).   Paratypes: ( 8 females)  China: 1 female,  Guangdong, Maoming, Yunkaishan National Nature Reserve, LSX591, MT-GD32, 22°16'38.37"N, 111°11'45.23"E, 30.iv-29.v.2020, Longlong Chen, SCAU 3049370 (SYSBM); 7 females,  Yunnan, Yongshan County, Huanghua Town, 28.00°N, 103.51°E,  1500 m, 8.x.2010, Wei Dong, [misidentified as  Ismarus dorsiger( Haliday)] Nos.201000305, 201000308, 201000311, 201000312, 201000314, 201000316, 201000317 (SCAU).  Distribution. China (Guangdong, Yunnan).  Comments.  Liu et al. (2011)reported additional distribution records of  Ismarus dorsiger(Haliday, 1831) from Yunnan Province of China. However, when we examined the 9 females identified as  Ismarus dorsiger(Haliday, 1831) (deposited in SCAU), it turns out that these specimens have mesoscutal suprahumeral sulci, which are absent in  I. dorsigeras was documented by Kolyada and Chemyreva (2016)and Kim et al. (2018a, b). Based on additional material collected from Guangdong, we describe them here as a new species. Therefore,  I. dorsigeris still unknown from China. 2020-07-04 2020-07-30 2020-07-04 China 1480 22.294643 Yunkaishan National Nature Reserve 1 111.21054 Maoming 1 Guangdong Holotype 2021-01-01 2021-12-31 2021-01-01 China China 8 8 Paratypes 2020-04-30 2020-05-29 2020-04-30 Longlong Chen China 22.277325 Yunkaishan National Nature Reserve 1 111.1959 Maoming 1 Guangdong paratype 2010-10-08 Wei Dong, Haliday, Nos. China Yongshan County 1500 28.0 Huanghua Town 740 103.51 1 Yunnan paratype