: atypical mitochondrial gene order among panpulmonates (Gastropoda).

Mitochondrial (mt) sequences are frequently used for phylogenetic reconstruction and for identification of species of molluscs. This study expands the phylogenetic range of Hygrophila (Panpulmonata) for which such sequence data are available by characterizing the full mt genome of the invasive freshwater snail (Physidae). The mt genome sequences of two isolates from Stubblefield Lake, New Mexico, USA, differed in length (14,490 14,314 bp) and showed 11.