These files comprise lists of neogastropod species from the Early Cenozoic of Seymour Island, Antarctica and tropical counterparts in both the US Gulf Coast and Paris Basin. They comprise a key part of the raw data analysed in the paper Crame et al. (2018). For each of these three localities species are listed in taxonomic order, following conventional taxonomic notation. Faunas are listed for the Paleocene, Early Eocene and Middle Eocene time intervals for the two tropical localities, but only for the Paleocene and Middle Eocene of Antarctica. The accurate location of all the localities is given in a series of published papers. The Seymour Island samples were collected across three field seasons; 1999, 2006 and 2010. The US Gulf Coast and Paris Basin data were constructed from existing literature. Funding was provided by the NERC grants NE/I005803/1 and NE/C506399/1.

Polar - tropical biodiversity comparisons are becoming essential in order to investigate fully the origin and maintenance of the larger scale patterns of life on Earth. Although many polar data are now readily to hand it is often more difficult to locate accurate and up to date tropical datasets to use in direct comparisons. This dataset represents an attempt to rectify this imbalance using two of the largest clades in shallow tropical seas at the present day. The data were obtained from primary published literature which is fully referenced below and in the companion research paper to this dataset. They relate to nine regional localities which stretch across the tropical realm from the Indo-West Pacific to the Americas. For each locality there is a full species list, with each species being assigned to both a genus and family. The latest taxonomic references have been used to ensure that all these lists are based on current biological nomenclature. Funding: Partly from NERC grant NE/I005803/1 Partly from BAS core funds