跟據< First report of the hermit crabs Coenobita brevimanus and Coenobita rugosus (Crustacea: Decapoda: Anomura) from the Indian coast >,「多年來藍紫陸寄居蟹(Coenobita violascens)被認為是凹足陸寄居蟹(Coenobita cavipes)的同物異名。但是Nakasone (1988) 認為凹足陸寄居蟹(Coenobita cavipes)和藍紫陸寄居蟹(Coenobita violascens)屬不同物種,這個需要對印度洋的陸寄居蟹物種作更多的研究」。
但是,跟據McLaughlin P. A (2007) < 台灣寄居蟹類誌 >,藍紫陸寄居蟹(Coenobita violascens)的彩圖是凹足陸寄居蟹(Coenobita cavipes),過去被冠為凹足陸寄居蟹(Coenobita cavipes)其實都是藍紫陸寄居蟹(Coenobita violascens),似乎McLaughlin P. A誤把凹足陸寄居蟹(Coenobita cavipes)當成藍紫陸寄居蟹(Coenobita violascens)。
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