title: Historical faunal exchange between the Pontocaspian Basin and North America
abstract: <i>Ecrobia</i> is a genus of small brackish-water mud snails with an amphi-Atlantic distribution. Interestingly, the species occurring in the northwestern Atlantic, <i>Ecrobia truncata</i>, is more closely related to the Pontocaspian taxa, <i>Ecrobia grimmi</i> and <i>Ecrobia maritima</i>, than to the species occurring in the northeastern Atlantic and Mediterranean Sea. At least three colonization scenarios may account for this peculiar biogeographical pattern: (1) a recent human-mediated disper
journal: Ecology and Evolution