Did frogs evolve from fish?
Frogs in prehistoric times
It is believed that these animals possessed simple lungs. For a long time it was believed that the coelacanth, like many other prehistoric animals, was extinct. In 1938, however, animals were discovered in the Indian Ocean that are very similar to the coelacanth of prehistoric times.
For smart weavers
How do living things succeed in adapting to changed living conditions? How did life develop from primeval to modern? Who descends from whom? The theory of descent deals with these and many other questions. The founder of the theory of "The Origin of Species" is Charles Darwin. According to his theory, all living things have one thing in commonAncestors. Living beings are subject to constant change and thus develop further. Higher living beings develop from simple organisms: that is evolution.
He made the next evolutionary step on the way to the amphibian and thus also to the frog Ichthyostega in ancient times.
He is one to two meters long and looks more like a fish than an amphibian. It has four short stocky legs, a fish-like head and an elongated tail that is reminiscent of that of an eel. In the water and on land, the great-grandfather of the frogs moves in undulating movements. Its thick, scaly skin protects it from dehydration for a short time when it sets out on one of its explorations on the mainland. The development of the tadpole to the frog shows how the limbs of the first vertebrates were formed. At the beginning the frog offspring breathes with gills and has a caudal fin for locomotion. Only later do his lungs and four legs develop.The grandfather of the frogs lived about 245 million years ago. A fossil very similar to today's frog was discovered in Madagascar, and it was given the beautiful name Triadobatrachus massinoti.
The first frogs lived around 200 million years ago. Scientists only recently published the discovery of an ancient frog that must have lived 70 million years ago. It was the size of a medicine ball and probably fed on insects and lizards. The Goliath frog that lives in West Africa today is 32 centimeters tall and weighs just 3 kg.
The primeval giant frog is related to today's horned frogs, as the skeletal and skull structures are similar in both species.
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