Updates are available Correction dated 2019-09-14

Article History

First Online: 19 August 2019

Change Date: 14 September 2019

Change Type: Correction

Change Details: Credit for the <Emphasis Type="Italic">Basilosaurus</Emphasis> tooth photograph in Figure 9a: Aaron Miller, Ancient Earth Trading Company LLC. Also, please note that individual teeth shown in both Figure 2 and Figure 9 were not the specific sources of accompanying enamel photomicrographs.

Compliance with Ethical Standards

: All specimens were obtained according to relevant regulations.

: The authors declare that they have no conflict of interest.