Dachibangus hui Zhang, Yao & Pang, 2021

Zhang, Xiao & Chen 1, Yunzhi YaoDong Ren 2, Hong Pang 1, Huayan, 2021, New mimarachnids (Hemiptera, Fulgoromorpha, Fulgoroidea) in mid-Cretaceous Burmese amber, ZooKeys 1057, pp. 37-48 : 37

Dachibangus hui Zhang, Yao & Pang sp. nov.

Figures 3 , 4

Etymology.

The new specific name is dedicated to Mr Zhengkun Hu for his donation of the Burmese amber containing the holotype.

Type material.

Holotype, CNU-HOM-MA2021002, adult male, wings well preserved, but legs missing.

Locality and horizon.

Hukawng Valley, Kachin State, Myanmar; mid-Cretaceous, lowermost Cenomanian.

Diagnosis.

Median carinae of mesonotum straight, subparallel to each other, lateral carinae posterior portion nearly straight (median carinae slightly sinuate, lateral carinae posterior portion arcuate in D. trimaculatus ); tegmen without spots (with spots in D. trimaculatus and D. formosus ); common stem ScP + R as long as basal cell (ScP + R longer than basal cell in D. formosus , ScP + R about 1/2 of basal cell in D. trimaculatus ); MP with five terminals (six terminals in D. trimaculatus ); the bifurcation of MP1+2 slightly proximad of the bifurcation of MP3+4 (the bifurcation of MP1+2 slightly apicad of the bifurcation of MP3+4 in D. formosus ); CuA1 almost straight (arcuate in D. trimaculatus ); CuA2 slightly curved mediad at level of tornus (more curved in D. formosus , strongly curved in D. trimaculatus ); CuP almost straight (sinuate in D. trimaculatus and D. formosus ); free stem of Pcu nearly as long as common stem of Pcu + A1 (Pcu longer than Pcu + A1 in D. trimaculatus ); CuP and Pcu + A1 not close to each other (close to each other in D. trimaculatus ); hind wing CuA forked at wing midlength (forked near wing base in D. trimaculatus ).

Description.

Total length of the preserved holotype about 14.21 mm, wings well-preserved.

Thorax: mesonotum wider than long in midline, densely punctate, median carinae paired, diverging laterad on scutellum, lateral carinae distinct, not reaching anterior margin, diverging posteriad, scutellum transversely wrinkled. Tegula large.

Wings: membranous. Tegmen 13.59 mm long, 5.06 mm wide, about 2.7 times as long as wide, with distinct venation and irregular network veinlets, and also with irregular colour bands from base to apex, costal margin weakly arched at base, apical margin round, posterior margin almost straight, tornus distinct. Costal area narrow and long, with transverse veinlets, narrowing toward tegmen apex, basal cell weak, arculus weak, Pc + CP parallel to costal margin, apical portion weakened, common stem ScP + R + M approximately as long as common stem ScP + R, ScP + RA not forked, posterior portion curved upward, then downward to apical margin, apical portion weakened, RP single, apical portion weakened, stem MP almost straight, forked in wing apical half, with five terminals, the bifurcation of MP1+2 slightly proximad of the bifurcation of MP3+4, MP1+2 reaching margin with three terminals, MP3+4 with two terminals, CuA forked near wing basal one-third, with two terminals, CuP present throughout wing, nearly straight, clavus open, Pcu and A1 fused apicad of CuA forking, narrow marginal membrane absent, wing-coupling fore fold present.

Hind wing membranous, about 10.57 mm long, 5.63 mm wide, slightly shorter than tegmen, without distinct coloration, irregular network veinlets present. Anteroapical angle round, stem ScP + R straight, forked late, with two terminals, ScP + RA apical portion curved, MP single, CuA forked at wing midlength, with two terminals, CuP almost straight, apical portion absent, Pcu weakly sinuous, A1 forked, giving off two branches.

Abdomen: male terminalia poorly preserved, with two symmetrical lobes, pygofer lobes carinate, anal tube elongate, anal styles protruding and ligulate.

Remarks.

The new species is attributed to the genus Dachibangus due to mesonotum median carinae diverging laterad on scutellum, lateral carinae strongly diverging posteriad, tegmen with irregular colour bands, costal area narrow, ScP + RA curved downward in apical portion, MP at least with five terminals, CuA2 curved mediad at level of tornus, tornus distinct.

Figures

Figure 3. Holotype of Dachibangus hui sp. nov. A habitus in dorsal view B distal part of forewing C basal part of forewing D mesonotum E sensory pits on mesonotum F male terminalia in ventral view. Scale bars: 5 mm (A); 1 mm (B, C, D, F); 0.5 mm (E).

Figure 4. Line drawings of Dachibangus hui sp. nov. A mesonotum B male terminalia C forewing D hind wing. Scale bars: 1 mm (A-D).