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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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Crocodylus johnstoni

The long, slender head of a sub-adult Johnston's crocodile. This species usually possesses at least one or two more pairs of maxillary teeth than other members of this genus, suggested by some to be a more 'primitive' evolutionary state. This crocodile was named after Robert A. Johnston who collected the first animal to be properly studied. However, due to an error the species was originally named C. johnsoni, although the name is now frequently spelt with the missing 't'. According to the rules of nomenclature, however, the original spelling should still be used.

Photograph courtesy of The National Zoo, Washington D.C.

ALL IMAGES:
[click on image for enlargement]

Click Adult freshwater crocodile Click Head of sub-adult Click Adult female gaping





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