Cilicydnus robustispinus Yao, Cai & Ren

Yao, Yunzhi, Cai, Wanzhi & Ren, Dong, 2007, The first fossil Cydnidae (Hemiptera: Pentatomoidea) from the Late Mesozoic of China, Zootaxa 1388, pp. 59-68 : 61-62

Cilicydnus robustispinus Yao, Cai & Ren , sp. nov. ( Figs. 1–5 )

Description: Body 1.6 times as long as wide. Head distinctly shorter than pronotum, 1.9 times as wide as long; antenna 2.4 times as long as head, second segment about 2 times as long as first, 1.1 times as long as third; eyes somewhat prominent, interocular space 2.8 times as wide as diameter of eyes in dorsal view. Pronotum 2.9 times as wide as long, anterior margin very concave, lateral margins convex, posterior margin straight, anterior angles rounded, posterior angles nearly rectangular; scutellum 2 times as wide as long, apex obtuse; all femora stout, more than 2 times as thick as corresponding tibiae, tibial spines nearly as long as diameter of tibia, fore leg shorter than mid, fore femur thicker than mid, fore tarsus 0.4 times as long as corresponding tibia, third tarsomere longest, almost 2 times as long as second and 4 times as long as first; mid tarsus 0.45 times as long as corresponding tibia, third tarsomere longest, 1.5 times as long as second and 4.5 times as long as first; hind tibia almost 1.5 times as long as hind femur, hind tarsus similar to fore and mid tarsi, third tarsomere longest, 1.4 times as long as second and 3.5 times as long as first. Fore wing 2.2 times as long as wide, extending beyond tip of abdomen by one­tenth of total length of hemelytron, costal margin slightly convex, median fracture 0.4 times of hemelytron in length; clavus nearly 4 times as long as wide, almost 0.5 times hemelytron in length.

Measurements (in mm): Body length 5.94 (ɗ), 6.09 (Ψ); maximal width of abdomen 3.38 (ɗ), 3.53 (Ψ); length head 0.76 (ɗ), 0.65 (Ψ), width 1.38 (ɗ), 1.09 (Ψ); length antennal segments I–IV: 0.24, 0.56, 0.44, 0.44 (ɗ); length rostrum segments I–IV:?,?, 0.56, 0.56 (ɗ); length pronotum 1.09 (ɗ), 0.9 (Ψ), width 3.18 (ɗ), 3.03 (Ψ); length scutellum 1.0 (ɗ), width 2.08 (ɗ); length hemelytron 4.94 (ɗ), width 2.2 (ɗ), length clavus 2.47 (ɗ), width 0.59 (ɗ); length fore leg: femur 1.09 (ɗ), tibia 1.0 (ɗ), tarsomeres I–III: 0.06, 0.12, 0.24 (ɗ); length mid leg: femur 1.26 (ɗ), 1.18 (Ψ), tibia 1.23 (ɗ), tarsomeres I–III: 0.06, 0.18, 0.26 (ɗ); length hind leg: femur 1.53 (ɗ), 1.47(Ψ), tibia 2.35 (ɗ), tarsomeres I–III: 0.08, 0.18, 0.26 (ɗ).

Material: Holotype, ɗ, CNU­HE­NN2006297­298 (part and counterpart); paratypes, 1 Ψ, CNU­HE­ NN2006299 (dorsoventrally compressed).

Locality and horizon: Huangbanjigou, Chaomidian Village, Beipiao City, Liaoning Province, China. Late Jurassic to Early Cretaceous, Yixian Formation.

Etymology: The name is derived from the Latin robustispinus , because of its tibiae with stout spines.

Figures

FIGURES 1 – 2. Cilicydnus robustispinus gen. & sp. nov. Holotype, outline. ♂. CNU­HE­LB 2006297 ­ 298. 1. dorsal view; 2. ventral view. Scale bar = 1 mm.

FIGURES 3 – 4. Cilicydnus robustispinus gen. & sp. nov., photograph. 3 – 4. Holotype, ♂. CNU­HE­LB 2006297 ­ 298, part and counterpart. Scale bar = 2 mm.

FIGURE 5. Cilicydnus robustispinus gen. & sp. nov. Paratype, Ψ, CNU­HE­LB 2006299. Scale bar = 1 mm.