Figure 6. Known species diversity (white bars) for clawed lobsters of the family Nephropidae and diversity normalized for epicontinental sea coverage (black bars) using the sea-level curve of Vail et al. (1978) for geological ages (Valanginian–Pliocene) as per Tshudy (2003). This figure updates that of Tshudy (2003).
exposure area, albeit interchangeably with rock volume. In neither paper did they acknowledge the attempt by Tshudy (2003; “Vail Curve method”) at normalizing/correcting for
exposure area. Also, Schweitzer and Feldmann (2014, p. 823, fig. 1A) used “number of maps with outcrops of a given age” as a proxy for rock volume; neither is necessarily correlated with