Morphological data of early Jurassic ammonoids

The following table provides the list of the 164 species used as representative of the 164 Pliensbachian-Toarcian genera, their stratigraphic occurrences, their values for Raup’s (1966, 1967) parameters WR (whorl expansion) and DR (distance of the generating curve to the coiling axis), their relative warp coordinates (RW1, RW2) and their scores on the two principal components of the allometric space (PC1, PC2). Chronostratigraphic abbreviations are as follows: 1, Jamesoni; 2, Ibex; 3, Davoei; 4, Margaritatus; 5, Spinatum; 6, Tenuicostatum; 7, Falciferum; 8, Bifrons; 9, Variabilis; 10, Thouarsense; 11, Dispansum; 12, Pseudoradiosa; 13, Aalensis.