An angelfish-mimic salmon sister from the late Cretaceous
Cawley and Kriwet 2019 describe Flagellipinna rhomboides,
“a pycnodontiform fish, Flagellipinna rhomboides, gen. et sp. nov., from this locality based on four specimens. It is considered a member of the derived family Pycnodontidae due to the presence of a post parietal process. This taxon is distinct from other pycnodontids due to its diamond-shaped body, whip-like dorsal fin, postcloacal scales with forward-pointing spines, and acute anterior profile with a concave slope, giving it a ‘hunchback’ appearance. The prognathous snout armed with molariform teeth suggests that this pycnodont preyed on a variety of shelled animals from crevices. The prognathous snout armed with molariform teeth suggests that this pycnodont preyed on a variety of shelled animals from crevices.”
From the introduction:
“Pycnodontiformes, or pycnodonts, were a successful order of neopterygian fishes with a rich fossil record that ranged from the Late Triassic to the Eocene.”
In the large reptile tree (LRT, 1652 taxa) Flagellipinna nests closely with Salmo, the extant salmon (Fig. 2), a basal teleost with sharp teeth. Salmo and kin were not mentioned in the text, but the authors’ reference list includes four citations related to salmonidae. This hypothesis of interrelationships may be novel. If you run across an earlier reference, please let me know so I can promote that citation.
References
Cawley JJ and Kriwet J 2019. A new genus and species of pycnodontid fish Flagellipinna rhomboides, gen. et sp. nov. (Neopterygii, Pycnodontiformes), from the Upper Cretaceous (Cenomanian) of Lebanon, with notes on juvenile form and ecology. Journal of Vertebrate Paleontology 39(2): e1614012
wiki/Flagellipinna (not listed yet)
Source: https://pterosaurheresies.wordpress.com/2020/02/22/an-angelfish-mimic-salmon-sister-from-the-late-cretaceous/
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