Tag: freshwater evolution
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Tiny fossil fish rewrite freshwater evolution after 70 million years hidden
A tiny fish with a big impact Researchers have unearthed a 4-centimeter-long skeleton from the Late Cretaceous that is rewriting our understanding of freshwater evolution. Named Acronichthys maccognoi, this diminutive fossil fish spent tens of millions of years hidden in rock before emerging to illuminate the deep history of otophysans, a major supergroup of bony…
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Tiny fossil fish rewrites freshwater evolution after 70 million-year mystery
New fossil sheds light on early freshwater fish evolution A remarkably small 4 cm fossil fish, hidden for 70 million years, is reshaping the story of how freshwater ecosystems evolved. Discovered in modern Canada and detailed in the reputable journal Science, the specimen has been named Acronichthys maccognoi. The fossil, dating to the Late Cretaceous…
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Fossilized ear bones rewrite the history of freshwater fish
A new timeline for the origin of otophysan fish Scientists have long noted that two‑thirds of all freshwater fishes possess a sophisticated hearing system known as the Weberian apparatus, a set of middle-ear bones that lets these fish hear much higher frequencies than most ocean species. In a stunning revision of this history, UC Berkeley…