2024年12月31日 · Forests and the coiled shell-bearing marine organisms known as ammonites first appeared early in the Devonian. Late in the period the first four-legged amphibians appeared, indicating the colonization of land by vertebrates.

Devonian tetrapods include fishapods and amphibians that lived during the Devonian Period.

2014年2月22日 · The earliest known tetrapod was Tiktaalik roseae. It is considered to be the link between the lobe-finned fishes and early amphibians.

The Devonian (/ d ə ˈ v oʊ n i. ən, d ɛ-/ də-VOH-nee-ən, deh-) [9] [10] is a geologic period and system of the Paleozoic era during the Phanerozoic eon, spanning 60.3 million years from the end of the preceding Silurian period at 419.62 million years ago , to the beginning of the succeeding Carboniferous period at 358.86 Ma.

2012年10月29日 · During the Devonian a few freshwater fish began the transition to life on land. Here we see two different tetrapod protoamphibians, one Acanthostega and two Icthyostega in a pool along with three lungfish (Dipterus) and a placoderm (Bothriolepis).

The Devonian Epoch is particularly renowned for the emergence of the first amphibians, which represent a pivotal transition from aquatic to terrestrial life. This evolutionary leap was facilitated by a group of lobe-finned fishes, known as sarcopterygians, which developed adaptations that allowed them to venture onto land.

2023年4月28日 · The oldest fossils of insects and spiders date to this time. Early tetrapods, ancestors of land-dwelling vertebrates, first appeared during the Devonian. The Devonian ended with a mass extinction. Learn more about events in the Devonian

Firsts: Insects and amphibians appear in the Devonian. Lasts: Most things lived through the Devonian into the Carboniferous. Notes: It is known as 'The age of fishes', but other animals are important too - amphibians were the first vertebrates to walk on the land.

2022年11月11日 · The first major groups of amphibians developed in the Devonian period, around 370 million years ago, from lobe-finned fish which were similar to the modern coelacanth and lungfish. These ancient lobe-finned fish had evolved multi-jointed leg-like fins with digits that enabled them to crawl along the

2024年12月31日 · The Scaphopoda (tusk shells) first appeared in the Devonian Period. Another significant Devonian event was the emergence of the ammonites from their still-extant nautiloid ancestors. In the chambered shell of the ammonites, internal septa create elaborate patterns where they join the outer shell.