Margarinotus taiwanus

The type series was collected from Tatachia in Nantou in central Taiwan. Additional specimens were obtained from Hsinpaiyang (=Xinbaiyang) in Hualien on the east coast of Taiwan.^[1]

The body is elongate-oval, convex, black, and shiny. The dorsal side is finely and rarely punctulate, although the elytra are sometimes more coarsely punctate. The legs are paler than the body, pitch-brown and a little expanded. It can be distinguished from all other members of the subgenus Grammostethus by the foretibia not being multidentate.^[1]

Total length is 5–6 mm (0.20–0.24 in) and width is 3.2–3.6 mm (0.13–0.14 in).^[1]