taxonID	type	description	language	source
038187F1FFC0E43E9EE391A4FD82E6AC.taxon	diagnosis	Diagnosis. A combination of these characters: crossvein sc-r absent; Sc reaching anterior margin at the level of rm; R 2 + 3, strongly sigmoidly curved, reaching anterior margin very close to the position of R 1 apex; R 2 + 3 about half of R 4 + 5; dRs more than half of R 2 + 3; bRs 1.1 – 1.5 times as long as dRs; and dM 1 + 2 shorter than r-m; legs relatively thin and slender; femur slightly thicker than tibia.	en	Lin, Xiuqin, Shih, Chungkun, Ren, Dong (2014): Two new species of Mesoplecia (Insecta: Diptera: Protopleciidae) from the late Middle Jurassic of China. Zootaxa 3838 (5): 545-556, DOI: 10.11646/zootaxa.3838.5.3
038187F1FFC0E43E9EE391A4FD82E6AC.taxon	etymology	Etymology. The specific name is derived from Latin adjective “ plenus ”, indicating the abdomen segments III – V are plump.	en	Lin, Xiuqin, Shih, Chungkun, Ren, Dong (2014): Two new species of Mesoplecia (Insecta: Diptera: Protopleciidae) from the late Middle Jurassic of China. Zootaxa 3838 (5): 545-556, DOI: 10.11646/zootaxa.3838.5.3
038187F1FFC0E43E9EE391A4FD82E6AC.taxon	description	Description. Head: Oviform, in dorsal view, with compound eyes, big and oval. Antennae filiform, more than twice of head length. Maxillary palpi barely visible. Thorax: Prothorax barely visible; anterior part of scutum in mesothorax arched convex in lateral view and large and oval in dorsal view; and metathorax slightly depressed in lateral view. Legs: Forelegs relatively thin and slender. Femur slightly expanded, covered with dense setae, tibia long and slender, longer than femur; 1 st tarsomere slightly shorter than tibia; 2 nd to 4 th tarsomere gradually thinned; the claws small. Mid legs similar to forelegs, slightly longer than forelegs, tibia longer than femur; femur thicker than tibia; tibial spur well developed; with two pretarsal claws. Hind legs: femur slightly expanded; tibia longer than femur, first tarsomere distinctly longer than first tarsomeres of fore and mid legs, with two claws at apex of pretarsi. Wings: Wings long and narrow; wing length 6 – 7.5 mm, width 2.6 – 2.8 mm. Apex of wings covering the abdominal terminalia (Figs. 3 A and 3 B) or not covering the abdominal terminalia (Figs. 2 A, 4 A and 5 A); humeral vein h well developed, straight and short; R 2 + 3 strongly sigmoidly curved; pterostigma close to oval; Rs arising from basal one – third wing length, furcated slightly distad of the level of M 1 + 2 forking; stem of Rs longer than R 2 + 3; R 4 + 5 weakly curved upward medially and twice the length of R 2 + 3, ending below apex of wing; bRs 2.6 – 3.1 times as long as r-m; M 2 6.3 – 7.5 times as long as dM 1 + 2; M 1, longer than M 2, almost equal to M 3 + 4; crossvein r-m about the length of m-cu, almost at level of Sc ending; ratio of bM 1 + 2 / dM 1 + 2 about 2.2; CuA strongly curved, ending at posterior margin of wing proximad of mid wing. Abdomen: In female, the 1 st tergite much narrower than the 2 nd tergite; the 3 rd to 5 th tergite widest, 6 th to 8 th tergite gradually thinned; the 9 th sternite combined with genitalia, undivided, with cerci apically (Figs. 2 – 3). In male, abdomen cylindrical; genitalia slightly narrower than abdomen; with gonocoxites projecting, almost fused with 9 th segment; gonostylus depressed, small and slightly cylindrical (Fig. 4).	en	Lin, Xiuqin, Shih, Chungkun, Ren, Dong (2014): Two new species of Mesoplecia (Insecta: Diptera: Protopleciidae) from the late Middle Jurassic of China. Zootaxa 3838 (5): 545-556, DOI: 10.11646/zootaxa.3838.5.3
038187F1FFC0E43E9EE391A4FD82E6AC.taxon	discussion	Remarks. The morphological differences among the species of Mesoplecia, based mostly on characters of wing venation, are summarized in Table 1. The new species is similar to M. stigma Rohdendorf, 1962 but differs in having crossvein sc-r absent (vs. present); bM 1 + 2 about 2.2 times as long as dM 1 + 2 (vs. 1.36); and dM 1 + 2 shorter than r-m (vs. longer). The new species differs from M. jurassica Rohdendorf, 1938 and M. sinica Zhang, 2007 in having R 2 + 3, strongly sigmoidly curved, reaching anterior margin very close to the position of R 1 reaching anterior margin (vs. R 2 + 3, sigmoidly curved, reaching anterior margin distad of the position of R 1 apex); R 2 + 3 shorter than bRs and dRs combined (vs. R 2 + 3 as long as bRs and dRs combined); and bRs 1.1 – 1.5 times as long as dRs (vs. 2.45 in M. jurassica and 2 in M. sinica). Comparisons with other species are listed in the Table 1.	en	Lin, Xiuqin, Shih, Chungkun, Ren, Dong (2014): Two new species of Mesoplecia (Insecta: Diptera: Protopleciidae) from the late Middle Jurassic of China. Zootaxa 3838 (5): 545-556, DOI: 10.11646/zootaxa.3838.5.3
038187F1FFC0E43E9EE391A4FD82E6AC.taxon	materials_examined	Type materials. Holotype, ♀, No. CNU-DIP-NN 2013048 (Fig. 2), almost complete fossil of a female in dorsal view, with well-preserved body, but only the right forewing venation clearly discernible. Paratypes: ♀, No. CNU-DIP-NN 2013052 p / c (Fig. 3); ♂, No. CNU-DIP-NN 2013050 (Fig. 4) and ♀, No. CNU-DIP-NN 2013098 (Fig. 5). All type specimens are deposited in the Key Laboratory of Insect Evolution and Environmental Changes, Capital Normal University.	en	Lin, Xiuqin, Shih, Chungkun, Ren, Dong (2014): Two new species of Mesoplecia (Insecta: Diptera: Protopleciidae) from the late Middle Jurassic of China. Zootaxa 3838 (5): 545-556, DOI: 10.11646/zootaxa.3838.5.3
038187F1FFC0E43E9EE391A4FD82E6AC.taxon	description	Measurements (in mm). Holotype: ♀, CNU-DIP-NN 2013048 [data for the holotype in brackets]. Body length (including head) 8.4 – 10.7 [10.7], maximal width of body 1.37 – 1.9 [1.9]; antenna length 1.5 as preserved for segments 1 – 11 in CNU-DIP-NN 2013050, 2.4 as preserved for segments 1 – 15 in CNU-DIP-NN 2013098 [2.2 as preserved for segments 1 – 12]. Foreleg: 1.5 – 1.8 [0.5 as preserved]; tibia 2 – 2.6 [2.5]. Mid leg: femur 1.5 – 2 [1.1 as preserved]; tibia 2.6 – 3.5 [2.6]. Hind leg: femur 2 – 2.8 (2 as preserved); tibia 3.5 – 4.7 [3.7]. Wing: length 6 – 7.5 [7.1], width 2.6 – 2.8 [2.8]; R 1 2.5 – 3.4 [3.1]; R 2 + 3 1.1 – 1.5 [1.4]; bRs 0.95 – 1.1 [1.1]; dRs 0.65 – 1.1 [0.94]; R 4 + 5 2.3 – 3 [2.7]; r-m 0.32 – 0.44 [0.4]; m-cu 0.26 – 0.45 [0.32]; bM 1 + 2 0.6 – 0.8 [0.78]; dM 1 + 2 0.28 – 0.4 [0.35]; M 1 2.4 – 3.4 [2.9], M 2 2.1 – 2.5 [2.3]; pterostigma: length 0.55 – 0.9 [0.9], width 0.35 – 0.5 [0.5]. Horizon and locality. All specimens were collected from the Jiulongshan Formation, late Middle Jurassic age (Bathonian – Callovian boundary interval) from Daohugou Village, Ningcheng County, Inner Mongolia Autonomous Region in China. Note 1: Data of M. anfracta are from the right wing of holotype in Figs 1 and 5 of Hao and Ren, 2009. Note 2: Abbreviations: 1. YES = Present; 2. NO = Not present; 3. SL = Sc reaching anterior margin at or near the same level with r-m; 4. PX = Sc reaching anterior margin proximad of r-m; 5. NA = Not available; 6. DS = R 2 + 3 reaching anterior margin distad of R 1 apex; 7. S-N = R 2 + 3 reaching anterior margin very close to the position of R 1 apex; 8. WL = Wing length (mm); 9. L / W = The ratio of wing length to width.	en	Lin, Xiuqin, Shih, Chungkun, Ren, Dong (2014): Two new species of Mesoplecia (Insecta: Diptera: Protopleciidae) from the late Middle Jurassic of China. Zootaxa 3838 (5): 545-556, DOI: 10.11646/zootaxa.3838.5.3
038187F1FFC5E4309EE392F2FA3FE737.taxon	diagnosis	Diagnosis. A combination of these characters: crossvein sc-r present; Sc reaching anterior margin at the level of rm; R 2 + 3, sigmoidly curved, reaching anterior margin distad of the position of R 1 apex; bRs 1.2 times as long as dRs; and dM 1 + 2 longer than r-m.	en	Lin, Xiuqin, Shih, Chungkun, Ren, Dong (2014): Two new species of Mesoplecia (Insecta: Diptera: Protopleciidae) from the late Middle Jurassic of China. Zootaxa 3838 (5): 545-556, DOI: 10.11646/zootaxa.3838.5.3
038187F1FFC5E4309EE392F2FA3FE737.taxon	etymology	Etymology. The specific name is derived from Latin word “ fastigatus ”, indicating the forelegs of the specimen with upraised posture.	en	Lin, Xiuqin, Shih, Chungkun, Ren, Dong (2014): Two new species of Mesoplecia (Insecta: Diptera: Protopleciidae) from the late Middle Jurassic of China. Zootaxa 3838 (5): 545-556, DOI: 10.11646/zootaxa.3838.5.3
038187F1FFC5E4309EE392F2FA3FE737.taxon	description	Description. Thorax: The boundary among prothorax, mesothorax and metathorax not distinct in ventral view (Fig. 6 A); the right halter small. Wing: Wing narrow and long (length: 7 mm, width: 2.8 mm); humeral vein h well developed, straight and short (Figs. 6 C, D); Sc well-developed, reaching anterior margin at the same level with r-m, crossvein sc-r present, located in the middle of Sc (Figs. 6 C, D); R 1 straight; Rs arising from R 1 at basal one-third of wing length, furcating slightly distad of the level of M 1 + 2 forking; pterostigma close to oval; bRs about 3.7 times as long as r-m; R 4 + 5, weakly curved upward medially, approximately 1.8 times as long as R 2 + 3, and almost equal to the basal part of Rs (bRs + dRs); M 1, longer than M 2, almost equal to M 3 + 4; M 2 about 5.3 times as long as dM 1 + 2; m-cu well developed; CuA strongly curved, ending at posterior margin proximad of mid wing in the left wing (Figs. 6 B, E). A 1 reaching the posterior margin in the left wing (Figs. 6 B, E). Legs: The coxae of forelegs and right hind leg expanded (Fig. 6 E). Forelegs: femur and tibia well-preserved, femur distinctly thicker than tibia, covered with dense setae; 1 st tarsomere shorter than tibia as preserved on the right foreleg, 2 nd to 5 th tarsomeres not preserved; Mid legs: only right tibia well-preserved, tibia long and slender, tibial spur not preserved. Right hind leg well-preserved; femur cylindrical and thick; tibia slightly less than 2 times as long as femur; two tibial spurs well-developed; 1 st to 5 th tarsomeres well developed with two pretarsal claws. Abdomen: Sternites in segments 1 – 7 clearly visible in ventral view. The 1 st sternite significantly narrower than the 2 nd; the 3 rd to 5 th sternite widest, the 8 th sternite combined with genitalia undivided, with cerci apically.	en	Lin, Xiuqin, Shih, Chungkun, Ren, Dong (2014): Two new species of Mesoplecia (Insecta: Diptera: Protopleciidae) from the late Middle Jurassic of China. Zootaxa 3838 (5): 545-556, DOI: 10.11646/zootaxa.3838.5.3
038187F1FFC5E4309EE392F2FA3FE737.taxon	discussion	Remarks. The new species is similar to M. plena sp. nov., but can be distinguished from the latter by crossvein sc-r present (vs. absent); R 2 + 3 reaching anterior margin slightly distad of R 1 apex (vs. R 2 + 3 reaching anterior margin very close to the position of R 1 apex) and dM 1 + 2 longer than r-m (vs. shorter). Comparisons with other species are listed in the Table 1.	en	Lin, Xiuqin, Shih, Chungkun, Ren, Dong (2014): Two new species of Mesoplecia (Insecta: Diptera: Protopleciidae) from the late Middle Jurassic of China. Zootaxa 3838 (5): 545-556, DOI: 10.11646/zootaxa.3838.5.3
038187F1FFC5E4309EE392F2FA3FE737.taxon	materials_examined	Type material. Holotype, ♀, No. CNU-DIP-NN 2013101 (Fig. 6), an almost completely preserved specimen of a female in ventral view, with well-preserved abdomen, the wing clearly visible as preserved. The type specimen is deposited in the Key Laboratory of Insect Evolution and Environmental Changes, Capital Normal University.	en	Lin, Xiuqin, Shih, Chungkun, Ren, Dong (2014): Two new species of Mesoplecia (Insecta: Diptera: Protopleciidae) from the late Middle Jurassic of China. Zootaxa 3838 (5): 545-556, DOI: 10.11646/zootaxa.3838.5.3
038187F1FFC5E4309EE392F2FA3FE737.taxon	description	Measurements (in mm). Holotype: ♀, CNU-DIP-NN 2013101. Body length (excluding head which is not preserved) 7.7, maximal width of body 1.5; Foreleg: femur 1.6; tibia 2.0. Mid leg: femur 0.8 (as preserved); tibia 2.3. Hind leg: femur 1.8; tibia 3.2. Wing: length 7.0, width 2.8; R 1 3.2; R 2 + 3 1.6; Rs 2.0; bRs 1.1; dRs 0.93; R 4 + 5 3; rm 0.3; m-cu 0.32; bM 1 + 2 0.6; dM 1 + 2 0.47; M 1 3.2, M 2 2.5; pterostigma: length 1, width 0.48.	en	Lin, Xiuqin, Shih, Chungkun, Ren, Dong (2014): Two new species of Mesoplecia (Insecta: Diptera: Protopleciidae) from the late Middle Jurassic of China. Zootaxa 3838 (5): 545-556, DOI: 10.11646/zootaxa.3838.5.3
