Craniofacial ontogeny in Tyrannosauridae (Dinosauria, Coelurosauria) Author Carr, T. D. text Journal of Vertebrate Paleontology 1999 1999-09-30 19 3 497 520 journal article 25986 10.1080/02724634.1999.10011161 c2c78f5e-a257-4126-98ba-42e9d944da50 3372241

TABLE 2. Maxillary tooth counts of maxillary alveoli, growth stage, and skull lengths of Albertosaurus libratus specimens showing a tendency for more mature specimens to have fewer tooth positions. () = estimated.

Specimen	Stage	# Maxillary alveoli	Skull length (mm)
AMNH 5664	1	15 (Bakker et al., 1988)	678 (Russell, 1970)
ROM 1247	1	14 (pers. obs.)	(750) (pers. obs.)
USNM 12814	1	13 (Bakker et al., 1988)	(795) (Russell, 1970)
TMP 83.36.100	1	15 (pers. obs.)	—
CMN 2270	1	15 (pers. obs.)	—
CMN 12063	1	14 (pers. obs.)	—
AMNH 5336	2	13 (Bakker et al., 1988)	(962) (Bakker et al., 1988)
UA 10	3	13 (Currie, pers. comm.)	(900) (Currie, pers. comm.)
AMNH 5458	3	14 (pers. obs.)	990 (Russell, 1970)
CMN 2120	3	13 (pers. obs.)	1,000 (pers. obs.)