Salmo, the salmon, enters the LRT at the base of the bony fish

Quick one today.
Salmo the salmon enters the large reptile tree (LRT, 1465+ taxa) between Amia and Hydrolycus at the base of the bony fish.

Figure 1. Skull of the salmon, Salmo. Compare to Amia, the bowfin (Fig. 2).

Figure 1. Skull of the salmon, Salmo. Compare to Amia, the bowfin (Fig. 2).

Salmo salar (Linneaus 1758; up to 1m) is the extant Atlantic salmon. The toothy premaxilla extends horizontally while the dentary curls dorsally, leaving the mouth open permanently. The nares appear at a gap between the premaxilla and nasals. The young hatch in fresh water, then swim out to sea.

Figure 4. The bowfin, Amia, nests with Protosphyraena in the LRT.

Figure 2. The bowfin, Amia, nests with Protosphyraena in the LRT.

Coloring the bones
to match tetrapod bones helps to quickly and confidently make comparisons. Fusion can be noted without adding sutures. Missing bones can be added without creating confusion.

Figure x. Newly revised fish subset of the LRT

Figure x. Newly revised fish subset of the LRT

References
Linnaeus C 1758. Systema naturæ per regna tria naturæ, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio decima, reformata.

wiki/Salmon
wiki/Atlantic_salmon

 

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