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Showing results for tags 'hagfish'.
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Now you guys can criticize me all you want with this theory, it’s just something I have thought of for a while. My theory is that hagfish (weird jawless fish with a primitive skull and no backbone) are in fact late surviving conodonts ( proto vertebrates from the Cambrian to late Triassic). First their Anatomy is very similar, a long eel like body, jawless appendages, and weird proto skulls. Another thing that’s supports my theory is that conodonts could have swam to deep water to escape environmental extinctions. So living in pitch dark water they lost their eyes but developed better olfactory senses to detect dead body’s and scavenge on them. It also explains why the conodonts in the deep sea are still alive because generally deep sea organisms are better at surviving mass extinctions. Another point is that hagfish are known from the Carboniferous, which is when conodonts were around, which could suggest that hagfish are just a family of conodonts. So yeah consider my theory, and write in the comments if you have any criticisms. Remember this is a theory I have had for a while.
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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 Locality: Ambilobe, Madagascar First appearance: Eoachtinistia foreyi was found 360 million years ago in Australia Paddlefish Species: Protopsephurus liui Age: 125.5 - 112.5 mya | early Cretaceous Formation: Yixian Formation Locality: Lingyuan City, Liaoning First appearance: This is the oldest known species Sturgeon Species: Peipiaosteus fengningensis Age: 125.5 - 120 mya | early Cretaceous Formation: Jehol Biota Locality: Chifeng, Nei Mongol First appearance: Multiple species e.g. Yanosteus longidorsalis found since 125 million years ago in China Pipefish Species: Hipposygnathus sp. Age: 28.1 - 13.8 mya | Oliogocene - Miocene Formation: Monterey Formation Locality: Santa Ynez Valley, California, USA First appearance: Solenostomidae species were found 55.8 million years ago in Italy Note: Although most of this collection only includes fishes that existed since the Mesozoic or later, I made an exception for the pipefish as their order, syngnathiform, existed since the late Cretaceous
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From the album: Vertebrates
Gilpichthys greenei (Bardack & Richardson 1977) Uppermost Carboniferous Mazon Creek Illinois USA-
- carboniferous
- gilpichthys
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(and 2 more)
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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.