Sphaeriid clams were collected from an ancient, continuously cultivated taro pond complex at Ke‘anae Peninsula, Maui. Both species are known for adaptations for temporary pond habitats and could have been initially introduced by the earliest Hawaiian settlers transported with moist taro root stock from other areas of Oceania.
University of Guam
Burky, Albert J.; Way, Carl M.; Hau, Skippy; and Benbow, M. Eric, "The Occurrence of the Freshwater Clams, Musculium partumeium (Say) and Pisidium casertanum (Poli) (Bivalvia: Sphaeriidae), in the Hawaiian Islands" (2000). Biology Faculty Publications. 306.