本文首次報導普氏膨顎蛛(Oedignatha platnicki Song et Zhu 1998)在台灣北部地區之發現。普氏膨顎蛛與台灣南部之點刻膨顎蛛(O. scrobiculata Thorell 1881) 之主要區別在於背甲較光滑，腹部背面沒有成對的藍灰色斑紋；而雄蛛觸肢之脛節突背支具有二枚小齒及雌蛛具有蕈狀之內部生殖構造，可與本屬其他種類相區別。本文根據台灣之普氏膨顎蛛標本重新進行描述、拍照及繪圖。雌蛛為首次被記錄及描述。

The corinnid spider, Oedignatha platnicki Song et Zhu 1998 is newly recorded from northern Taiwan. It differs from O. scrobiculata Thorell 1881 from southern Taiwan by having a relatively smooth carapace and lacking any paired light spots on the abdomen, and from all the other congeners by the male having two minute teeth on the dorsal branch of tibial apophysis, and the female having a mushroom-shaped vulva. Both sexes of O. platnicki are described or redescribed, photographed and figured based on materials from Taiwan. The female of O. platnicki is described for the first time.