2.snails

(1) Pronunciation: luó sī and

(2) Definition: scientific name Margarya melanioides. A general term for the genus Gastropoda snails in mollusca. Genus endemic to China.

(3) Extracurricular expansion: distributed in lakes in Yunnan and Jiangsu. The shell is large, with a height of more than 70 mm, and the shape is conical or pyramidal; There are spinous or papillary protrusions on the surface of the shell, or only smooth spiral edges. This is a horny paper. It is hermaphrodite, viviparous and can reproduce all year round. Snails crawl with wide feet at the bottom of the lake. The meat is delicious, and snail yellow (male gonad) is a favorite food.

(4) Snail fossils were found in Cenozoic strata in Yunnan, Guizhou and Guangxi.

(5) Adult snails are about 7 cm long and weigh about 55 grams ... Their meat and male snail gonads (commonly known as "snail yellow") are delicious.

(6) High economic value. Due to serious pollution and overfishing, the lake is on the verge of extinction.