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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The head of a juvenile slender-snouted crocodile, in which the dark blotches present on the jaw of young animals can be seen. This species is one of several crocodilian species with characteristically narrow jaws (including C. johnstoni, T. schlegelii and G. gangeticus).

Photograph © Adam Britton

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Head of juvenile crocodile

Head of adult crocodile

Post-occipital and nuchal scales