臺灣新紀錄外來種：多稜角螺Angulyagra polyzonata (Frauenfeld, 1862)（腹足綱：田螺科）之形態描述與生殖生物學初探
摘要
An exotic species, Angulyagra polvzonata (Frauenfeld, 1862) (Gastropoda: Prosobranchia: Mesogastropoda: Viviparidae) was reported as a species of freshwater snail newly recorded to Taiwan. It is originally produces from the Chinese Fujian, Guangdong, Hainan Island and Yunnan, the tropics and the subtropics area. The Angulvagra polyzonata invasion into Taiwan was by people to release into the wild and the aquarium ornamentals trade. It inhabited in river, stream, channel and pond, feed on stem and leaf of hydrophytes and epiphytic algae. In this reported, we will describe its morphology characters, and to estimate minimum length of reproduction was 18 mm and average embryo number was 3.95±9.47. In addition, it is need to attentiveness that Angulyagra polyzonata whether to destroy crop and competition to habitat with originally freshwater snail.