Fig. 8
Lithological section for the Besano Formation at P. 902 and distribution of several repeated preservational features. a The source level of the Saurichthys specimens used herein; b articulation values for specimens from each bed. Grey diamonds represent the complete specimens and the black squares, the fragmentary specimens; c completeness values for specimens from each bed. Grey diamonds represent the complete specimens and the black squares, the fragmentary specimens; d the occurrence of the head as an isolated unit; e the occurrence of black eye spots