Sanmai mengi Chen, Zhang, and B. Wang, 2016

Chen, Jun, Zhang, Haichun, Wang, Bo, Zheng, Yan, Wang, Xiaoli & Zheng, Xiaoting, 2016, New Jurassic tettigarctid cicadas from China with a novel example of disruptive coloration, Acta Palaeontologica Polonica 61 (4), pp. 853-862 : 857-858

Sanmai mengi Chen, Zhang, and B. Wang sp. nov.

Fig. 3 .

Etymology: In reference to the family name of Mencius (Meng Tsy), one of the sages of Confucianism.

Holotype: STMN48-1802, well-preserved adult female in lateral aspect with overlapped wings at the top of the body.

Type locality: Daohugou Village, Ningcheng County, Inner Mongolia, China.

Type horizon: Upper Middle–lower Upper Jurassic Daohugou beds.

Diagnosis. —Compound eye nearly oval in lateral view. Abdomen stout. Forewing with length/width ratio 2.5; RA 1 short and straight; RP fused with nodal line for a distance; M 1+2 long and curved near nodal line; u3 elongate, about 0.3 wing length.

Description.— Holotype STMN48-1802: Body length as preserved 23.6 mm including forewing in repose. Compound eye large, nearly oval in lateral view. Antenna with scape slightly thicker than pedicel, flagellum aristiform, with segments invisible. Postclypeus partly missing, convex. Rostrum extending beyond hind coxae, nearly to apex of hind femur. Pronotum expanded, anterior half with tiny granular protuberances and posterior area transversely rugose. Mesonotum partly exposed. Legs partly preserved; femora with tiny granules (or bases of thick setae?); tibiae densely setose, with distinct ridges. Abdomen stout, with nine segments visible. Ovipositor well-developed, ensiform, adpressed to pygofer. Forewing length about 19.6 mm, width about 7.8 mm. coloration pattern not preserved. Costal area long and narrow, with ratio of length to width about 5.1. Clavus broad and arched. Nodal line distinct. Eight apical cells. Stem ScP+R+M+CuA thick, bifurcating into ScP+R and M+CuA at basal 0.22 wing length. Stem ScP+R straight. RA with two terminations; RA 1 short and nearly straight; RA 2 geniculate at junction with crossvein ir, then subparallel to RA 1. RP fused with nodal line for a distance, slightly curved at junction with crossvein r-m, and re-curved at junction with crossvein ir. Stem M+CuA bifucating just beyond junction with crossvein cua-cup. Stem M straight, bifurcating into M 1+2 and M 3+4 at basal 0.42 wing length. u3 about 0.3 wing length. Vein M 1+2 long and sinuous beyond nodal line. Vein M 3+4 simple, connected with M 2 by crossvein im. Stem CuA long and sinuous. CuP long and straight. A 1 sinuous. A 2 short and strongly curved.

Remarks. —The new species is similar to S. kongi Chen, Zhang, and B. Wang sp. nov., but differs from the latter in possessing short and straight RA 1; long and curved (near nodal line) M 1+2; elongate u3, about 0.3 wing length for tegmen.

Stratigraphic and geographic range. —Upper Middle–lower Upper Jurassic; Daohugou Village, Ningcheng County, Inner Mongolia, China.

Figures

Fig. 3. Hairy cicada Sanmai mengi sp. nov., holotype (STMN48-1802) from the upper Middle–lower Upper Jurassic Daohugou beds. Photograph (A), explan- atory drawing (B).