Bolson Tortoise

波尔森沙龟（Gopherus flavomarginatus）是沙龟属中体型最大的物种，俗称墨西哥巨龟或波尔森龟。种加词“flavomarginatus”意为“黄缘”，指其背甲边缘的黄色斑纹。主要分布于墨西哥北部的波尔森盆地（Bolson de Mapimí），部分种群被引入美国亚利桑那和新墨西哥州。

Lineage: Turtles and Tortoises (TESTUDINES) > Cryptodira (CRYPTODIRA) > Durocryptodira (DUROCRYPTODIRA) > Testudinoid Turtles Superfamily (TESTUDINOIDEA) > Tortoises (TESTUDINIDAE) > North American Tortoises Subfamily (XEROBATINAE) > Gopher Tortoises (Gopherus) > Bolson Tortoise (Gopherus flavomarginatus). This path helps place the taxon within its family, genus, or species-level context.