Redescription of Gastrophysa atrocyanea (Motschulsky) and G. polygoni (Linnaeus) (Insecta: Coleoptera: Chrysomelidae: Chrysomelinae), with Notes on Their Biology

Abstract

Gastrophysa atrocyanea (Motschulsky, 1860) is a Chrysomelinae species that appears only during spring, with only one record reported from Taiwan. More specimens were collected from Kinmen islands. This species was redescribed, based on morphological characteristics, including the penis, gonocoxae, spermatheca, and abdominal ventrite VIII in females. Another widespread species, G. polygoni (Linnaeus), was compared to test the diagnostic value of these characters. Detailed biological information is provided for G. atrocyanea, including larval and adult feeding behaviors, host plants, and life cycle. G. polygoni elongata Jolivet 1951 is proposed as a junior synonym of the nominate subspecies. 蓼藍齒脛金花蟲 (Gastrophysa atrocyanea) 是只在春天才出現的金花蟲；除了雄性生殖器，還針對觸角、雌蟲生殖突基節、雌蟲受精囊及雌蟲的第八腹節腹板加以描繪；並藉由跟另外一個廣泛分佈種萹蓄齒脛金花蟲 (G. polygoni) 相互比對，來測試這些特徵是否有診斷價值；並對此種生物學包括幼蟲及成蟲的取食行為、寄主植物及生活史提供更詳細的資料。