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Scientists in Argentina have discovered excellently preserved fossil remains of the oldest-known tadpole, the larval stage of a large frog species that lived alongside dinosaurs about 161 million ...
In 2024, a tadpole specimen of N. degiustoi (MPM-PV 23540) was reported from the La Matilde Formation of Argentina, representing the oldest known tadpole and the first stem-anuran larva in the fossil record. Tadpoles of this species reached lengths of 15.9 centimetres (6.3 in), among the largest recorded in frogs living or extinct. [5]
Tadpoles of N. degiustoi constitute the oldest tadpoles found as of 2024, dating back to 168–161 million years ago. These tadpoles also showed adaptations for filter-feeding, implying residence in temporary pools by filter-feeding larvae was already commonplace. [37] The evolution of modern Anura likely was complete by the Jurassic period.
A tadpole or polliwog (also spelled pollywog) is the larval stage in the biological life cycle of an amphibian. Most tadpoles are fully aquatic, though some species of amphibians have tadpoles that are terrestrial. Tadpoles have some fish-like features that may not be found in adult amphibians, such as a lateral line, gills and swimming tails.
A 68-million-year-old skull fossil found in Antarctica has revealed the oldest known modern bird, which was likely related to the waterfowl that live by lakes and oceans today, according to new ...
Triops is a genus of small crustaceans in the order Notostraca (tadpole shrimp). The long-lasting resting eggs of several species of Triops are commonly sold in kits as pets. The animals hatch upon contact with fresh water. Most adult-stage Triops have a life expectancy of up to 90 days and can tolerate a pH range of 6 to 10. In nature, they ...
Triadobatrachus is an extinct genus of salientian frog-like amphibians, including only one known species, Triadobatrachus massinoti.It is the oldest member of the frog lineage known, and an excellent example of a transitional fossil.
Pneumodesmus newmani is a species of myriapod.It is originally considered that it lived during the late Wenlock epoch of the Silurian period around 1] [2] [3] However, a 2017 study dates its occurrence based on zircon data analysis as the Early Devonian (). [4]