Agrioglypta fulguralis Rosfiansyah, Yagi & Hirowatari sp. nov. (Crambidae) is described from the Ryukyus, Japan, based on morphological characteristics and DNA barcoding. Although this new species is similar to A. itysalis, it can be distinguished by the following characters: its smaller size, a lightning marking on the discoidal part of the hindwing, lack of a pair of scale tufts on male seventh abdominal segment, shorter uncus, wider tegumen, wider valva in the male genitalia, and fewer spines in the signum in the female genitalia. DNA barcoding also supports the distinction of this new species from A. itysalis found in China, Java, Papua New Guinea, and Australia. Images of the adults and male and female genitalia are provided herein.
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