推荐回答（5个）
地图龟
地图龟是比较常见的龟类品种，其中一些种类的地图龟在国内市场很常见，但是一些品种也是相对稀少，也就是说，地图龟有很多的亚种，这些亚种的外观变化范围很大，鉴别起来比较麻烦。
它们是淡水龟，分布在美国东部及加拿大南部。它们的外表很像其他泽龟科龟类，如伪龟属及彩龟属，但较为细小及在龟壳中央有一道鳞棱。它们的龟壳纹像地图，故得此名。它们的寿命可达15~20岁。地图龟具有许多独特的特征，使它不同于在同一地区出没的其他水龟。它们是变化多端的一群龟类，每一类都有着不同的习性，食谱和栖息环境。
界：动物界Animalia
门：脊索动物门 Chordata
纲：爬行纲 Reptilia
目：龟鳖目 Testudines
科：泽龟科 Emydidae
地图龟现有的物种有：
Barbour’s Map Turtle (Graptemys barbouri) 巴氏地图龟
Cagle’s Map Turtle(Graptemys caglei) 卡氏地图龟
Escambia Map Turtle (Graptemys ernsti) 恩氏地图龟
Yellow-blotched Map Turtle (Graptemys flavimaculata) 黄斑地图龟
Northern Map Turtle (Graptemys geographica) 北部地图龟
Pascagoula Map Turtle (Graptemys gibbonsi) 吉氏地图龟
Delta Map Turtle (Graptemys nigrinoda delticola) 三角洲地图龟
Black-knobbed Map Turtle (Graptemys nigrinoda nigrinoda) 黑瘤地图龟
Ringed Map Turtle (Graptemys oculifera) 环纹地图龟
Ouachita Map Turtle (Graptemys ouachitensis ouachitensis) 沃希托地图龟
Sabine Map Turtle (Graptemys ouachitensis sabinensis) 萨比娜地图龟
Pearl River Map Turtle (Graptemys pearlensis) 珍珠河地图
Mississippi Map Turtle (Graptemys pseudogeographica kohnii) 密西西比地图龟
False Map Turtle (Graptemys pseudogeographica pseudogeographica) 拟地图龟
Alabama Map Turtle (Graptemys pulchra) 阿拉巴马地图龟
Texas Map Turtle (Graptemys versa) 德克萨斯地图龟
我们在市场上常见的应该是密西西比地图龟和拟地图龟。
我确定，这是“乌龟”，又叫“泥龟”和“草龟”。看看这里吧：http://baike.baidu.com/view/18484.html?wtp=tt
http://zhidao.baidu.com/question/170467768.html
这个是巴西龟..我家也养有。养了10年了..很大个 - -！
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