Fig. 8. Growing recognition of sauropod diversity through history. Only genera now considered valid are included. (a) Broken down by clade. The vertical thickness of the lines is proportional to the number of genera; the earliest valid genus in each clade is marked by a circle. Terminal clades have simple counts; for non-terminal clades, parentheses enclose the number of basal genera, that is, not members of depicted subclades, and are followed by total counts that include those of all subclades. (b) Total recognized diversity.