Tiny Fundulus can teach us something about giant Mola
Let the graphic tell the tale today
as the odd, giant, ocean sunfish, Mola, gets a little make-over based on the tiny top-minnow, Fundulus.
Figure 1. Tiny Fundulus, a top minnow, bears enough of a resemblance and proximity to giant Mola to help understand skull morphology.
” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2024/02/mola2023skull588.jpg?w=231″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2024/02/mola2023skull588.jpg?w=584″ class=”size-full wp-image-84532″ src=”https://pterosaurheresies.files.wordpress.com/2024/02/mola2023skull588.jpg?w=584&h=757″ alt=”Figure 1. Tiny Fundulus, a top minnow, bears enough of a resemblance and proximity to giant Mola to help understand skull morphology. ” width=”584″ height=”757″ srcset=”https://pterosaurheresies.files.wordpress.com/2024/02/mola2023skull588.jpg?w=584&h=757 584w, https://pterosaurheresies.files.wordpress.com/2024/02/mola2023skull588.jpg?w=116&h=150 116w, https://pterosaurheresies.files.wordpress.com/2024/02/mola2023skull588.jpg?w=231&h=300 231w, https://pterosaurheresies.files.wordpress.com/2024/02/mola2023skull588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />
Figure 1. Tiny Fundulus, a top minnow, bears enough of a resemblance and proximity to giant and strangely proportioned Mola to help understand its derived skull morphology. What was labeled a ‘ligament’ (the red arc is homologous to the tabular (red arc) on Fundulus. This is how evolution works.
All new insights and hypotheses,
like this one (Fig 1), are still subject to change as the fish subset of the LRT undergoes a lot of ‘housekeeping.’
These two
(Fig 1) are not sisters in the LRT. Lagocephalus (the pufferfish) is one of several transitional taxa between them as reported earlier here. Sometimes certain traits skip a generation or two – or perhaps more taxa might reveal a more direct lineage. The loss of the pelvic fins and circumorbital ring (= postorbital homolog) in Mola finds convergence in several derived clades.
References
Cuvier G 1816. Le règne animal distribué d’après son organisation, pour servir de base à l’histoire naturelle des animaux et d’introduction à l’anatomie comparée. Les reptiles, les poissons, les mollusques et les annélides. Déterville, Paris. Vol. 2, Edition 1: i-xviii, 1-532, (pls. 9-10, in v. 4).
Linnaeus C von 1758. Systema naturæ per regna tria naturæ, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio decima, reformata.
wiki/Killisfish – Fundulus
wiki/Galaxias
wiki/Diodon
wiki/Tetraodontidae
wiki/Oceanic_puffer – Lagocephalus
wiki/Mola mola
Source: https://pterosaurheresies.wordpress.com/2024/02/26/tiny-fundulus-can-teach-us-something-about-giant-mola/
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