Vetusala maculata, Fu & Huang, 2023

Fu, Yan-Zhe & Huang, Di-Ying, 2023, New Triassic Hylicellidae from northern China (Hemiptera, Cicadomorpha), Zootaxa 5396 (1), pp. 10-15 : 11

Vetusala maculata sp. nov.

Fig. 1

Material. Holotype, NIGP203460 , an isolated forewing without clavus; deposited in the Nanjing Institute of Geology and Palaeontology , Chinese Academy of Sciences, Nanjing, China.

Etymology. The specific epithet is derived from the Latin word ‘ macula ’, indicating its holotype with a distinctive marking on the forewing.

Diagnosis. As for the genus (monospecific) with additional characters: tegmen covered with dark markings at costal area, basal and terminal parts of postcostal cell, cell C5, and apical portion of tegmen; several elliptical or irregular dark-coloured patches present.

Type locality and horizon. Near Hejiafang Village , Jinsuoguan Township , Yintai District , Tongchuan City, Shaanxi Province, China; lower part of the Yanchang Formation; late Middle Triassic .

Description. Tegmen length 13.5 mm; costal margin arched; apical margin rounded; bScP smoothly arched; Pc relatively short, extending to RA 2 terminals; MP+CuA stalk relatively long; stem R curved at base, forked at basal 0.46 of tegmen length; RA forking into RA 1 and RA 2 basad of MP forking; RA 1 oblique, long, only slightly shorter than stem RA; RA 2 pectinately forked, with five terminal branches; RP sinuous, unbranched; stem MP almost straight, forked slightly basad of CuA forking, at basal 0.63 of tegmen length, with five terminal branches; stem CuA curved at base; 2nd section CuA 1 about 2.4 times as long as 1st section of CuA 1, 1st section of CuA 1 about 1.7 times as long as crossvein mp-cua; mp-cua longer than ir, rp-mp, and im; cua-cup obscure, presumably connecting fusion of MP and CuA at a single point or slightly before it; basal cell unclear; postcostal cell broad, much wider than median cell and radial cell. Tegmen covered with a distinctive colour pattern: dark markings at costal area, basal and terminal parts of postcostal cell, along Pc, and at apical 3/4 of tegmen; several elliptical or irregular dark-coloured patches present at radial cell, median cell, cubital cell, and cell C1; and cell C5 darkened. Distinctive tiny punctures evenly distribute in basal half of postcostal cell, basal radial and median cells, cubital cell, and along basal half of RP and MP.

Figures

FIGURE 1. Vetusala maculata gen. et sp. nov., holotype (NIGP203460). A, Photograph under vertical light. B, Photograph under lateral light. C, Line drawing. Scale bars = 2 mm.