Angulyagra polyzonata is a species of a freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Viviparidae.
Distribution This species is found in southern and southeastern China and in northern Vietnam.Madsen H. & Hung N. M. (2015). "Reprint of "An overview of freshwater snails in Asia with main focus on Vietnam"". Acta Tropica 141(Part B): 372–384. . It is non-indigenous in Taiwan. 蔡政達(Cheng-Da Tasi), 蘇俊育(Chun-Yu Su) & 邱郁文(Yuh-Wen Chiu) (2009). "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. A Morphological Description and Reproductive Biology of Angulyagra polyzonata (Frauenfeld, 1862) (Gastropoda: Viviparidae) as a Snail Newly Recorded Specice to Taiwan". Bulletin of Malacology 33(1): 1-14. abstract.
Description The width of the shell is 11.2–21.4 mm. The height of the shell is 13.8–32.5 mm.
Similar species is Bellamya heudei.Shea, M. (1994). The Chinese viviparid snail Bellamya heudei guangdungensis (Kobelt, 1906) in Australia (Prosobranchia: Viviparidae). Molluscan Research, 15(1), 3-11. .
Ecology Habitat Angulyagra polyzonata lakes, rivers, creeks and drains. It is a common species in aquaculture ponds.
Parasites and predators Angulyagra polyzonata is a host of a trematode Multicotyle purvisi.
Predators of Angulyagra polyzonata include the black carp Mylopharyngodon piceus.Hung, N. M., Stauffer, J. R., & Madsen, H. (2013). Prey species and size choice of the molluscivorous fish, black carp (Mylopharyngodon piceus). Journal of freshwater ecology, 28(4), 547-560. .
Human use This species is eaten by people and it is used as fish, poultry and livestock raising. It is usually collected from the aquaculture pond when the pond is empty.
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