Jackson Wheat | The Coelacanth's Tale @JacksonWheat | Uploaded October 2023 | Updated October 2024, 13 hours ago.
A discussion of “The Coelacanth’s Tale” in Richard Dawkins’ and Yan Wong’s book The Ancestor’s Tale. All pictures are from Google. BONUS: The modern Coelacanth species are members of the subfamily Latimeriinae. There was a sister group that is now extinct, the subfamily Ticinepomiinae, which includes forms that drastically deviate from the stereotypical form and shape seen in other Coelacanths. In particular, these include Foreyia (described in 2017) and the recently described Rieppelia (2023). Their differences may have been the result of heterochrony; an ontogenetic mechanism of evolution previously discussed in the axolotl’s tale. The skull shape and ‘beaks’ of these strange coelacanths are reminiscent of other coral eating fish like parrot fish. Thus it is believed that the Ticinepomiinaens were feeding on corals in a similar way, or something else with hard shells. They underwent a rapid burst of evolution at the beginning of the mesozoic, likely filling new niches left vacant after the end Permian mass extinction, as well as eating the corals that were making an appearance during the same time. For more info, consult the following references
“Early Mesozoic burst of morphological disparity in the slow-evolving coelacanth fish lineage”
nature.com/articles/s41598-023-37849-9
“Why Coelacanths Are Almost “Living Fossils”?”
frontiersin.org/articles/10.3389/fevo.2022.896111/full
Citations used in the video:
“Early evolution of life cycles in embryophytes: A focus on the fossil evidence of gametophyte/sporophyte size and morphological complexity”: onlinelibrary.wiley.com/doi/full/10.1111/j.1759-6831.2010.00096.x
“Which morphological characters are influential in a Bayesian phylogenetic analysis? Examples from the earliest osteichthyans”: ncbi.nlm.nih.gov/pmc/articles/PMC6684994
“Mitochondrial genomic divergence in coelacanths (Latimeria): slow rate of evolution or recent speciation?”: link.springer.com/article/10.1007/s00227-010-1492-7
“Coelacanth and Whales Fossils Never Found Together: Does this Solve the Dino/Human YEC Problem?”: youtu.be/cFhk7_8u8F0?si=IvfIZSL0ct6A1QhK
“A comprehensive phylogenetic analysis of coelacanth fishes (Sarcopterygii, Actinistia) with comments on the composition of the Mawsoniidae and Latimeriidae: evaluating old and new methodological challenges and constraints”: tandfonline.com/doi/abs/10.1080/08912963.2020.1867982
“Why coelacanths are not ‘living fossils’”: doi.org/10.1002/bies.201200145
“A New Coelacanth (Actinistia, Sarcopterygii) from the Jurassic of France, and the Question of the Closest Relative Fossil to Latimeria”: jstor.org/stable/pdf/4524470.pdf?casa_token=mUO544l1d3kAAAAA:SIaUhEQIT0x8CGfSdl2WXEEAx7QEFJpwdytADcYnjbGI_azYfDwWOxC1WjM5jC1rlYM6rAD6l9WdwjfyEP7I5TUfXFNcXAyYKByC_UK6hdVPwQ8rYA
A discussion of “The Coelacanth’s Tale” in Richard Dawkins’ and Yan Wong’s book The Ancestor’s Tale. All pictures are from Google. BONUS: The modern Coelacanth species are members of the subfamily Latimeriinae. There was a sister group that is now extinct, the subfamily Ticinepomiinae, which includes forms that drastically deviate from the stereotypical form and shape seen in other Coelacanths. In particular, these include Foreyia (described in 2017) and the recently described Rieppelia (2023). Their differences may have been the result of heterochrony; an ontogenetic mechanism of evolution previously discussed in the axolotl’s tale. The skull shape and ‘beaks’ of these strange coelacanths are reminiscent of other coral eating fish like parrot fish. Thus it is believed that the Ticinepomiinaens were feeding on corals in a similar way, or something else with hard shells. They underwent a rapid burst of evolution at the beginning of the mesozoic, likely filling new niches left vacant after the end Permian mass extinction, as well as eating the corals that were making an appearance during the same time. For more info, consult the following references
“Early Mesozoic burst of morphological disparity in the slow-evolving coelacanth fish lineage”
nature.com/articles/s41598-023-37849-9
“Why Coelacanths Are Almost “Living Fossils”?”
frontiersin.org/articles/10.3389/fevo.2022.896111/full
Citations used in the video:
“Early evolution of life cycles in embryophytes: A focus on the fossil evidence of gametophyte/sporophyte size and morphological complexity”: onlinelibrary.wiley.com/doi/full/10.1111/j.1759-6831.2010.00096.x
“Which morphological characters are influential in a Bayesian phylogenetic analysis? Examples from the earliest osteichthyans”: ncbi.nlm.nih.gov/pmc/articles/PMC6684994
“Mitochondrial genomic divergence in coelacanths (Latimeria): slow rate of evolution or recent speciation?”: link.springer.com/article/10.1007/s00227-010-1492-7
“Coelacanth and Whales Fossils Never Found Together: Does this Solve the Dino/Human YEC Problem?”: youtu.be/cFhk7_8u8F0?si=IvfIZSL0ct6A1QhK
“A comprehensive phylogenetic analysis of coelacanth fishes (Sarcopterygii, Actinistia) with comments on the composition of the Mawsoniidae and Latimeriidae: evaluating old and new methodological challenges and constraints”: tandfonline.com/doi/abs/10.1080/08912963.2020.1867982
“Why coelacanths are not ‘living fossils’”: doi.org/10.1002/bies.201200145
“A New Coelacanth (Actinistia, Sarcopterygii) from the Jurassic of France, and the Question of the Closest Relative Fossil to Latimeria”: jstor.org/stable/pdf/4524470.pdf?casa_token=mUO544l1d3kAAAAA:SIaUhEQIT0x8CGfSdl2WXEEAx7QEFJpwdytADcYnjbGI_azYfDwWOxC1WjM5jC1rlYM6rAD6l9WdwjfyEP7I5TUfXFNcXAyYKByC_UK6hdVPwQ8rYA
