Origin of fins that evolved to become fingers
Long ago, at least by the Early Silurian,
prior to the Devonian invention of lobe fins among tetrapodomorphs, our fish ancestors developed over-size, ray-fin, pectoral fins in taxa like the referred specimen of Lasanius shown here (Fig 1).
Two of these taxa are extant. One, Coilia (Fig 1), still has oversize pectoral rays.
So this is a primitive trait in this lineage.
Figure 1. The Early Silurian origin of pectoral fins in the lineage that led to tetrapodomorph lobe fins, featuring Lasanius, Albertonia, Coilia and Engraulis.
” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2024/03/coilia_ramcaratii-alberonia-lasanius588.jpg?w=191″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2024/03/coilia_ramcaratii-alberonia-lasanius588.jpg?w=584″ class=”size-full wp-image-85077″ src=”https://pterosaurheresies.files.wordpress.com/2024/03/coilia_ramcaratii-alberonia-lasanius588.jpg?w=584&h=916″ alt=”Figure 1. The Early Silurian origin of pectoral fins in the lineage that led to tetrapodomorph lobe fins, featuring Lasanius, Albertonia, Coilia and Engraulis. ” width=”584″ height=”916″ srcset=”https://pterosaurheresies.files.wordpress.com/2024/03/coilia_ramcaratii-alberonia-lasanius588.jpg?w=584&h=916 584w, https://pterosaurheresies.files.wordpress.com/2024/03/coilia_ramcaratii-alberonia-lasanius588.jpg?w=96&h=150 96w, https://pterosaurheresies.files.wordpress.com/2024/03/coilia_ramcaratii-alberonia-lasanius588.jpg?w=191&h=300 191w, https://pterosaurheresies.files.wordpress.com/2024/03/coilia_ramcaratii-alberonia-lasanius588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />
Figure 1. The Early Silurian origin of pectoral fins in the lineage that led to tetrapodomorph lobe fins, featuring Lasanius, Albertonia, Coilia and Engraulis.
These pectoral, pelvic, dorsal, caudal and anal fins
developed in convergence with those virtually identical fins found in placoderms, sharks and catfish. That’s only one reason why bony fish have been, and continue to be, so difficult to nail down phylogenetically.
References
wiki/European_anchovy – Engraulis
wiki/Coilia
wiki/Lasanius
wiki/Albertonia – not yet posted
Source: https://pterosaurheresies.wordpress.com/2024/03/29/origin-of-fins-that-evolved-to-become-fingers/
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Evolution is a LIE.
Where are all those fish with fingers, half man half fish fossils?