A 161 million-year-old fossil, linked to a line of extinct frog-like amphibians, is the oldest tadpole ever found. By Asher Elbein The metamorphosis of a frog from baby to adult is one of nature’s ...

All tadpoles grow into frogs, but not all frogs start out as tadpoles, reveals a new study on 720 species of frogs. The new study uncovers the surprising evolution of life cycles in frogs. All ...

The discovery in Patagonia shows that frogs have had a tadpole stage for at least 160 million years. Here’s how the ancient frogs compare to those of today. Tadpoles and adults of the extinct frog ...

An artist depicts the tadpole and frog individuals of the Notobatrachus degiustoi species. The oldest known tadpole fossil, which belongs to this species, was found in the Patagonia region of ...

Nectophrynoides comprise only about one percent of all frogs and toads, but that number is officially increasing. In a study published in the journal Vertebrate Zoology, biologists describe an ...

Have you ever wondered how city life affects animals like frogs? A new study reveals that urban Túngara frog tadpoles develop faster—but end up being smaller—than tadpoles from forests, probably ...

This is a preview. Log in through your library . Abstract Istock (1967) argued on theoretical grounds that "complex life cycles are inherently unstable over evolutionary time," yet the vast majority ...

The life cycle of Gorgoderina attenuata Stafford, 1902, is described and figured. Adult flukes live in the bladder of various species of Rana and in Triturus v. viridescens. Miracidia hatch in the ...