Fig. 6 in Biometric analysis of the teeth of fossil and Recent hexanchid sharks and its taxonomic implications

Fig. 6. Acrocone shape of lower teeth in Late Eocene (Early Lutetian) Hexanchus agassizi from south−western France. Bivariate plot constructed as in Fig. 4. Data for Recent Hexanchus species are indicated by symbols for H. nakamurai teeth but only by regression lines for H. griseus teeth. Holotypes, paratypes and figured teeth of the fossil species from the work of Ward (1979) are distinguished on the graph. Some H. microdon specimens (Paleocene − early Eocene) have been added for comparison.