When Yang Ping-shih, who has recorded close to 20 water beetle species, was preparing to study Taiwan's endemic butterfly species Sasakia charonda formosana, he first collected previous related literature, but discovered that the species was mentioned by name in only three reports, all from the Japanese period.
記錄、發表近二十種水生甲蟲的楊平世，在研究台灣特有種大紫蛺蝶之前收集相關文獻，發現只有三篇日據時代報告提到大紫蛺蝶之名，其餘生活史不詳，還有待學界開啟其身世之謎。