The 300 Million Year History of Amphibian Evolution - ThoughtCo
2019年8月15日 · The earliest known true frog was the tiny Vieraella of early Jurassic South America, while the first true salamander is believed to have been Karaurus, a tiny, slimy, big-headed amphibian that lived in late Jurassic central Asia.
Amphibian - Evolution, Classification, Adaptation | Britannica
2024年9月14日 · Frogs from the middle of the Jurassic Period (201.3 million to 145 million years ago) and thereafter possess the general morphology of extant frogs. This group includes one family, Discoglossidae, which has living species.
Creativity, Orgins, and Ancestors — The Nature Institute
Frog fossils can be found back into the Mesozoic era (colloquially known as the age of dinosaurs) and can be very well preserved (see Figure 3). In some cases one even finds fossils of tadpoles and partially metamorphosed frogs in one layer (see, for example, Roček and van Dijk 2006).
Frog - Wikipedia
Learn about frogs, a group of short-bodied, tailless amphibians with diverse skin patterns and vocalizations. Find out how frogs are classified, distributed, adapted, and threatened by human activities.
Comprehensive New Amphibian Family Tree Revises Frog
2023年9月3日 · Most detailed and comprehensive family tree to date of frogs created using molecular data. Researchers, including Jeff Streicher, Senior Curator in Charge, Amphibians and Reptiles at the Natural History Museum, London, have unveiled the most extensive evolutionary tree of frogs (anuran amphibians) to date.
New amphibian family tree indicates they evolved tens of millions …
2023年9月1日 · Researchers, including Jeff Streicher, Senior Curator in Charge, Amphibians and Reptiles at the Natural History Museum, London, have unveiled the most extensive evolutionary tree of frogs (anuran...
New amphibian family tree a leap forward in understanding frogs, …
2023年8月31日 · A comprehensive phylogeny of 5,242 frog species based on molecular data shows that they evolved around 180 million years ago, tens of millions of years later than previously thought. The study, led by Natural History Museum researchers, also developed new software to improve gene comparison and provides a valuable resource for future frog studies.
The radiation continuum and the evolution of frog diversity
2023年11月4日 · Here, the authors use morphological and phylogenetic data for 1226 species of frogs, finding that less than half of families resemble adaptive radiation, but that adaptive radiation contributed...
Frogs and humans are kissing cousins | Nature
2010年4月29日 · The genome of the western clawed frog, Xenopus tropicalis, has now been analysed by an international consortium of scientists from 24 institutions, and joins a list of sequenced model organisms...
Exploratorium: Frogs: The Amazing, Adaptable Frog / Page 1 of 6
Learn about the ancient and diverse history of frogs, from their prehistoric origins to their modern adaptations. Discover how frogs can survive in various climates, from deserts to Arctic, and how they can leap amazing distances.