REPTILE FOSSILS

The origin of the reptiles lies about 310–320 million years ago, in the steaming swamps of the late Carboniferous period, when the first reptiles evolved from advanced reptiliomorphs.  The oldest known animal that may have been an amniote is Casineria (though it may have been a temnospondyl). A series of footprints from the fossil strata of Nova Scotia dated to 315 Mya show typical reptilian toes and imprints of scales. These tracks are attributed to Hylonomus, the oldest unquestionable reptile known. It was a small, lizard-like animal, about 20 to 30 centimetres (7.9 to 11.8 in) long, with numerous sharp teeth indicating an insectivorous diet. Other examples include Westlothiana (for the moment considered a reptiliomorph rather than a true amniote) and Paleothyris, both of similar build and presumably similar habit.

Rise of the reptiles. The earliest amniotes, including stem-reptiles (those amniotes closer to modern reptiles than to mammals), were largely overshadowed by larger stem-tetrapods, such as Cochleosaurus, and remained a small, inconspicuous part of the fauna until the Carboniferous Rainforest Collapse. This sudden collapse affected several large groups. Primitive tetrapods were particularly devastated, while stem-reptiles fared better, being ecologically adapted to the drier conditions that followed. Primitive tetrapods, like modern amphibians, need to return to water to lay eggs; in contrast, amniotes, like modern reptiles – whose eggs possess a shell that allows them to be laid on land – were better adapted to the new conditions. Amniotes acquired new niches at a faster rate than before the collapse and at a much faster rate than primitive tetrapods. They acquired new feeding strategies including herbivory and carnivory, previously only having been insectivores and piscivores. From this point forward, reptiles dominated communities and had a greater diversity than primitive tetrapods, setting the stage for the Mesozoic (known as the Age of Reptiles). One of the best known early stem-reptiles is Mesosaurus, a genus from the early Permian that had returned to water, feeding on fish.

Elosuchus cherifiensis Crocodile Teeth, Cretaceous Morocco
Crocodilian Teeth from the Gharial like, long snout Cretaceous beasty.  These are Early Cretaceous (Cenomanian), Aufous Fm, Morocco. All come boxed and labelled.  Where the tooth is too big for a label, this will come with the box.  Some of the labels are removed for photographic purposes. 

Elosuchus Crocodilian Tooth 52

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Elosuchus Crocodilian Tooth 53

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Elosuchus Crocodilian Tooth 55

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Elosuchus Crocodilian Tooth 56

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Elosuchus Crocodilian Tooth E1

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Elosuchus Crocodilian Tooth E3

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Elosuchus Crocodilian Tooth E2

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Elosuchus Crocodilian Tooth E4

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Elosuchus Crocodilian Tooth E21

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Elosuchus Crocodilian Tooth E9

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Elosuchus Crocodilian Tooth E19

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Elosuchus Crocodilian Tooth E27

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Elosuchus Crocodilian Tooth E15

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Elosuchus Crocodilian Tooth E22

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Elosuchus Crocodilian Tooth E28

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Elosuchus Crocodilian Tooth E17

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Elosuchus Crocodilian Tooth E6

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Elosuchus Crocodilian Tooth E23

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Elosuchus Crocodilian Tooth E14

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Elosuchus Crocodilian Tooth E8

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Elosuchus Crocodilian Tooth E26

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Elosuchus Crocodilian Tooth E7

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Elosuchus Crocodilian Tooth E11

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Elosuchus Crocodilian Tooth E18

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Elosuchus Crocodilian Tooth E10

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Elosuchus Crocodilian Tooth E5

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Elosuchus Crocodilian Tooth E20

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Elosuchus Crocodilian Tooth E12

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Elosuchus Crocodilian Tooth E25

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Elosuchus Crocodilian Tooth E30

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Elosuchus Crocodilian Tooth E32

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Elosuchus Crocodilian Tooth E35

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Elosuchus Crocodilian Tooth E36

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Elosuchus Crocodilian Tooth E37

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Elosuchus Crocodilian Tooth E38

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Elosuchus Crocodilian Tooth E41

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Elosuchus Crocodilian Tooth E50

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Elosuchus Crocodilian Tooth E51

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Elosuchus Crocodilian Tooth E52

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Elosuchus Crocodilian Tooth E53

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Elosuchus Crocodilian Tooth E57

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Elosuchus Crocodilian Tooth E59

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Elosuchus Crocodilian Tooth E60

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Elosuchus Crocodilian Tooth E61

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Elosuchus Crocodilian Tooth E62

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Elosuchus Crocodilian Tooth E63

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Elosuchus Crocodilian Tooth E67

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Elosuchus Crocodilian Tooth E68

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Amphibian (Salamander) fossils, USA
Eel-like Amphibian (Salamander) Vertebra from the North Florida Pleistocene clay. These are fiddly little fossils to find, and not too common.

Siren lacertina Amphibian Vertebra 028

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Alligator mississippiensis Scute & Teeth fossils, USA
Fossil dermal scutes and Teeth from Alligators. These scute fossils are identified by the ridge along the middle of the scute and pitted surface. Teeth are nearly always conical and domed shaped. All below belong to Alligator mississippiensis sp and are dated to between 1.0 and 1.5 Million years old.

Fossil Alligator mississippiensis Scute + Tooth Set 151

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Fossil Alligator mississippiensis Scute + Tooth Set 153

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Fossil Alligator mississippiensis Scute + Tooth Set 154

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Fossil Alligator mississippiensis Scute + Tooth Set 155

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Fossil Alligator mississippiensis Scute + Tooth Set 156

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Fossil Alligator mississippiensis Scute + Tooth Set 159

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Fossil Alligator mississippiensis Scute + Tooth Set 161

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Fossil Alligator mississippiensis Scute + Tooth Set 162

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Fossil Alligator mississippiensis Scute + Tooth Set 163

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Fossil Alligator mississippiensis Scute + Tooth Set 164

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Fossil Alligator mississippiensis Scute + Tooth Set 166

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Fossil Alligator mississippiensis Scute + Tooth Set 167

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Fossil Alligator mississippiensis Scute + Tooth Set 168

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Fossil Alligator mississippiensis Scute + Tooth Set 169

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Fossil Alligator mississippiensis Scute + Tooth Set 170

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Fossil Alligator mississippiensis Scute + Tooth Set 152

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