Stomach contents of the archaeocete Basilosaurus isis: Apex predator in oceans of the late Eocene
Fig 5
Permanent teeth of adult Basilosaurus isis WH 10001.
The position of each tooth in the WH 10001 B. isis excavation is shown in Fig 4, identified by the last three digits of its CGM number. A, CGM 60552, left M1 or M2. B, CGM 60570, anterior half of right P4 or posterior half of left P4. C, CGM 60568, right I1. D, CGM 60558, right M2. E, CGM 60554, posterior half of right P4. F, CGM 60579, left C1. G, CGM 60561, right I2. H, CGM 60565, right I1. Note heavy wear, especially on premolars, consistent with predation on large animals and relative maturity of the WH 10001 B. isis itself. Abbreviations: C1, first lower canine; I1, first upper incisor; I1-2, lower incisor 1–2; M2, lower molar 2; M1-2, upper molar 1–2; P4, lower premolar 4; P4, upper premolar 4.