Small class of bilaterally symmetrical marine forms comprising the tooth shells. pig-sized tailless South American amphibious rodent with partly webbed feet; largest living rodent. 由两边对称的海洋掘足纲软体动物组成的一个小纲。南美洲无尾的两栖类啮齿动物,体型大小如猪,部分蹼足;最大的现存啮齿动物。
Pig-sized tailless South American amphibious rodent with partly webbed feet; largest living rodent. 南美洲无尾的两栖类啮齿动物,体型大小如猪,部分蹼足;最大的现存啮齿动物。