Pholidophorus latiusculus (Agassiz 1832; holotype, Carnian, Late Triassic) was a herring-like fish with thick ganoid scales and a poorly ossified spine. Traditionally considered an early teleost, here Pholidophorus nests with extant Hoplerythrinus and kin, not far from Kryptoglanis.

Hoplerythrinus unitaeniatus (originally Erythrinus unitaeniatus Spix and Agassiz 1829; 25cm) is the extant gold wolf fish or aimara, found in South American rivers. Like Amia, this taxon does well with stagnant, oxygen-poor water by gulping air.

Pantodon buchholzi (Peters 1876-7; 13cm) is the extant freshwater butterflyfish. Traditionally considered close to Osteoglossum, here Pantodon nests a little closer to Hoplerythrinus. Large, stiff, pectoral fins and long gracile pectoral rays provide a bit of a glide after leaping from the water. This is an air-breathing fish that stays close to the surface. Males have a copulatory organ.

Agassiz L 1832. Untersuchungen über die fossilen Fische der Lias-Formation. Jahrbuch für Mineralogie, Geognosie, Geologie und Petrefaktenkunde, 3, 139–149.

Agassiz L 1845. Monographie de poissons fossiles des Vieux Grès Rouges ou Système Dévonien (Old Red Sandstone) des Îles Britanniques et de Russie. Imprimerie de Petitpierre et Prince, Neuchâtel.

Arratia G 2013. Morphology, taxonomy, and phylogeny of Triassic Pholidophorid fishes (Actinopterygii, Teleostei). Journal of Vertebrate Paleontology 33:1-138.

Peters WKH 1876-7. Über eine merkwürdige von Hrn. Professor Dr. Buchholz entdeckte neue Gattung von Süsswasserfischen, Pantodon buchholzi, welche zugleich eine neue, den Malacopterygii abdominales angehörige Gruppe von Fischen, Pantodontes, repräsentirt. Monatsberichte der Akademie der Wissenschaft zu Berlin 1876: 195-200.

wiki/Pholidophorus
wiki/Hoplerythrinus_unitaeniatus
wiki/Freshwater_butterflyfish - Pantodon