Shell Family of Taiwan
Unionidae 蚌科 contain18 species in Taiwan，show16 - 18
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Unionidae 蚌科：The naiad shell has two parts, a right and left valve held together by a dorsal ligament. Variations in the color of shell outer covering range from light yellow to green or brown or black; shells of many species are patterned with irregilar-shaped markings or rays.
Senitfic Name
Chinese Name
omenclator
photo
 Unio douglasiae   (Griffith et Pidgeon, 1834)  
 Unio douglasiae sinuolatus   (v. Martens, 1905)  
 Unio douglasiae taiwanicus 石蚌  (Pilsbry, 1905)