Land-living amphibians – Labyrinthodonts

lovethee Articles

LABYRINTHODONTS

The early amphibians are known as labyrnthodonts. This is on account of the structure of their teeth. The teeth were conical, but the enamel, the tough outer covering, was convoluted and infolded into a maze-like pattern along with the bony dentine that underlay it. In some examples there was no pulp, the interior of the tooth consisted of nothing but folded dentine This is similar to the pattern in the lobe- finned fishes, indicating that the earliest amphibians evolved from this group. (walking dinosaur costume)

 

LAND-LIVING AMPHIBIANS

The amphibians were primarily water-based animals, needing the water as a place in which to breed. The adult forms of many of the Permian amphibians, however, were well adapted to life on land, despite the fact that the reptiles were also establishing themselves as the major group of land dwellers. These terrestrial amphibians began to show a wide range of adaptation to the dry environments.(animatronic dinosaur for sale)

 

Seymouria

When Seymouria was found it was seen to be so well adapted to a land-living existence that it was regarded as one of the first reptiles. However, it is now thought to have been one of the seymouriamorphs – the main group of land-living amphibians. It was dug up near Seymour in Texas by famous fossil hunter Charles H. Sternberg in the 1880s, but not examined until 1939.

 

Features:The backbone is strongly built and the leg bones powerful with broad muscle-attachments – adaptations for walking on land, but not for running quickly. It would have moved like a modern lizard, throwing its body into sideways S-shaped undulations to increase the reach of the limbs. The structure of the ear shows a good sense of hearing.