Table 1.

Tooth sizes, von Ebner incremental line widths, tooth formation, and replacement rate estimates for fossil archosaurs

Taxon	Sample size, n	Mean crown volume, ml	Increment size range, μm	Mean increment width, μm	Mean tooth formation rate, days	Tooth replacement rate, days
Crocodilian†	1	0.90	8–19	13.0	246	NA
Leidyosuchus†	1	1.20	13–22	19.0	283	NA
Adult Edmontonia‡	1	0.20	9–17	13.5	279	NA
Adult Triceratops§	2	2.65	13–26	15.8	381	83
Infant Lambeosaurinae¶	5	0.12	11	11.0	147	60
Adult Prosaurolophus¶	3	2.0	15–28	16.0	323	81
Infant Maiasaura¶	1	0.10	11–19	12.0	132	46
Adult Maiasaura¶	1	1.90	13	13.0	281	58
Juvenile Edmontosaurus¶	3	0.43	12–21	14.0	225	NA
Adult Edmontosaurus¶	2	2.0	11–25	19.8	339	50
Adult Deinonychus**	1	0.20	6–12	10.1	413	290*
Adult Troodon‡‡	2	0.04	7–15	11.0	363	NA
Juvenile Albertosaur††	1	1.80	12–17	14.5	339	296*
Adult Albertosaur††	1	18.0	12–24	14.0	519	454*
Juvenile Tyrannosaurus††	1	1.80	12–17	14.0	264	NA
Sub. Ad. Tyrannosaurus††	1	15.5	8–17	14.0	314	NA
Adult Tyrannosaurus††	1	138	7–22	17.0	933	777*

NA, not applicable. 

*Replacement rate estimated via computed tomography (see Materials and Methods). 

^†Neosuchia (13). 

^‡Nodosauridae (14). 

^§Ceratopsidae (15). 

^¶Hadrosauridae (16). 

^**Dromomaeosauridae (Theropoda) (17). 

^‡‡Troodontidae (Theropoda) (17). 

^††Tyrannosauridae (Theropoda) (17).