Origin of teeth 2025: another fail due to taxon exclusion
Haridy et al (the Neil Shubin lab) 2025
looked at the origin of vertebrate teeth and evolution of sensory exoskeletons.
Figure 1. Ordovician Eriptychius compared to Early Silurian Shenacanthus demonstrates the origin of jaws in that clade.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/01/eriptychius-arctolepis-shenacanthus588-2.jpg?w=98″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/01/eriptychius-arctolepis-shenacanthus588-2.jpg?w=335″ class=”size-full wp-image-83952″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/01/eriptychius-arctolepis-shenacanthus588-2.jpg” alt=”Figure 1. Ordovician Eriptychius compared to Early Silurian Shenacanthus demonstrates the origin of jaws in that clade.” width=”584″ height=”1788″ srcset=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/01/eriptychius-arctolepis-shenacanthus588-2.jpg?w=584&h=1788 584w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/01/eriptychius-arctolepis-shenacanthus588-2.jpg?w=49&h=150 49w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/01/eriptychius-arctolepis-shenacanthus588-2.jpg?w=98&h=300 98w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2024/01/eriptychius-arctolepis-shenacanthus588-2.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />
Figure 1. Ordovician Eriptychius compared to Early Silurian Shenacanthus demonstrates the origin of jaws in that clade.
Unfortunately
the authors assumed that teeth evolved only once.
According to
the large reptile tree (LRT, 2338 taxa), which minimizes taxon exclusion, vertebrate jaws and teeth evolved 3x.
Read about convergence in tooth evolution here from 2023
1. from conodonts and Lasanius leading to tetrapods…
2. from placoderms leading to catfish…
3. from Eriptychius and Shenacanthus leading to sharks, spiny sharks and Salmo.
Before you write your next paper
make sure your cladogram is up to date.
References
Haridy, Y et al (10 co-authors) 2025. The origin of vertebrate teeth and evolution of sensory exoskeletons. Nature (2025). https://doi.org/10.1038/s41586-025-08944-w
Source: https://pterosaurheresies.wordpress.com/2025/05/22/origin-of-teeth-2025-another-fail-due-to-taxon-exclusion/
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