Supplementary datasets to: Molecular species delimitation and morphometry in the Melampus bidentatus (Panpulmonata, Ellobiidae) cryptic species complex

The coffee bean snail Melampus bidentatus occurs in coastal salt marshes along the North American Atlantic and Gulf coasts and in the Caribbean. It was recently found that this large geographical span is actually occupied by a complex of three apparently cryptic species (preliminarily called “North”, “South”, and “Gulf”) with partially overlapping distributions. Until now, it was not clear whether there are any morphological differences between the three species or which of the available names can be applied to each of the cryptic species. We used the already-known distribution patterns of the cryptic species as well as new barcode sequences to assign available names to the three cryptic species. We then compared morphological characters from 264 specimens using two approaches: an analysis based on 11 landmark points on the shell and another based on the entire shell outline. We were able to assign a nominal name to each of the three cryptic species: Melampus bidentatus for “North”, Mel..., ,