FAMILY:
ALLIGATORIDAE

A. mississippiensis
A. sinensis
C. crocodilus
C. c. apaporiensis
C. c. fuscus
C. latirostris
C. yacare
M. niger
P. palpebrosus
P. trigonatus

FAMILY:
CROCODYLIDAE

C. acutus
C. intermedius
C. johnstoni
C. mindorensis
C. moreletii
C. niloticus
C. novaeguineae
C. palustris
C. porosus
C. rhombifer
C. siamensis
M. cataphractus
O. tetraspis
T. schlegelii

FAMILY:
GAVIALIDAE

G. gangeticus

DICHOTOMOUS KEY
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This photograph illustrates the rather haphazard arrangement of premaxillary teeth in this Yacare caiman, apparently a result of being held in captivity (e.g. diet, stress, space). Older animals sometimes possess lower teeth which entirely pierce the upper jaw and project above the skin.

Photograph © Adam Britton

ALL IMAGES:
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Head of adult caiman

Head-on view of caiman

Top-down view of caiman head