Amia and Calamopleurus

Fish - Chordata

Basal Chordata

Chondrichthyes

Acipenseriformes

Placodermi

Siluriformes - Acanthodii

Amiiformes

Tetrapoda

Reptilia/Amniota

Lepidosauromorpha

Cephalerpeton clade

Captorhinidae

Milleretta Limnoscelis clade

Bolosaurus Diadectes clade

Turtle Pareiasaur clade

Fenestrasauria • Pterosauria

Protosquamata

Squamata

Archosauromorpha

Basal Archosauromorpha

Amia calva (Linneaus 1766; up to 70cm in length) is the extant bowfin, a basal fish able to breathe both water and air. Note the paired inhale nares and exhale nares (green) close to the barbels (pink). Deep lips rim the long teeth. Females produce 2000 to 5000 eggs. Fossil relatives of Amia have a worldwide distribution in fresh and salt waters.

Calamopleurus cylindricus (Agassiz 1841, Early Cretaceous; 15cm to 1m) is traditionally considered a relative of Amia, the bowfin. Here it nests with Sauropsis from the Late Jurassic. Many 3D fossil specimens are known from South America of this predatory genus.

Agassiz L 1833-43. Recherches sur les poissons fossiles. Imprimerie de Petitpierre et Prince, Neuchâtel.

Linneaus C von 1766. Systema naturæ per regna tria naturæ, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio duodecima, reformata. pp. 1–532. Holmiæ. (Salvius) .

wiki/Amia
wiki/Calamopleurus

Actinista

Latimeria

Lepisosteiformes

Gavinia

Lepisosteus

Robustichthys

Prionotus

Amiiformes

Prohalecites

Amia

Arapaima