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Showing results for tags 'hagfish'.
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I've always loved living fossils, especially the fish. They are relics of an age long lost, offering us a glimpse of an incredible prehistoric world. Some are enigmas that survived countless extinction events since the Devonian. Others are majestic predators that swam alongside the dinosaurs. Let me present my collection of living fossil fishes from the Mesozoic and before. I will begin with one of the most famous of all - the coelacanth Coelacanth Species: Whiteia woodwardi Age: 252.3 - 251.3 mya | early Triassic Formation: Diego Basin; Middle Sakamena Formation
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- gar
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From the album: Vertebrates
Gilpichthys greenei (Bardack & Richardson 1977) Uppermost Carboniferous Mazon Creek Illinois USA -
Synchrotron radiation shows 100 million year old slime and helps redraw fish family tree https://phys.org/news/2019-01-fossilized-slime-million-year-old-hagfish-vertebrate.amp
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The coelacanth, lamprey and hagfish all share the status of being relicts having survived nearly unchanged for 400 million years. why are these organisms still present on earth when many of their relatives when extinct? What aspects of their biology or ecology allowed for this? Do these fish add support of controversy to the theory of evolution by natural selection? EDIT: The author is going to reword this inquiry; as there have been responses, we will wait and merge/delete as necessary.
