Table S9.1. Molluskan taxa recognized in the field

Molluskan taxa recognized in the field (under column headed 'Field taxa'), species later identified within each field taxon ('Species'), pooled taxa used in quantitative analyses ('Taxon used in analyses'), and the total number of shells ('Total shells') within each field taxon counted for the excavation units used in the analyses of species composition. Note that each number may refer to several of the species listed in the 'species' column, and that a few of the listed species were identified from one or two individuals found in excavation units which were not used in quantitative analyses.