于氏宽缘龙，节肢动物门-昆虫纲-鞘翅目-龙虱科。Body regularly oval,distinctly convex,black with a bronze lustre, ferruginous brown on head, on sides of pronotum and on underside, with testaceous markings on elytra. Head black with a bronze lustre, with two dark ferruginous spots on vertex and labrum. Antennae testaceous. Reticulation consisting of well-impressed polygonal meshes, irregular in size, with 1-4 small punctures within them and mesium punctures at some of the intersections; several large and irregularly-distributed punctures present on disc. Row alongside eyes and clypeal grooves consisting of mesiu-sized and confluent punctures. Antennae testaceous, short, joint slender, the fifth 2.3 times longger than broad. Pronotum black with a bronze lustre, dark ferruginous at sides. Reticulation consisting of well-impressed polygonal meshes, irregular tin size; meshes with 1 to 3 minute punctures complete at sides and consisting of large and confluent punctures, narrowly interrupted midway; punctures more