Halecomorphi

Halecomorphi is a taxon of ray-finned bony fish in the clade Neopterygii.

The only extant Halecomorph species are the bowfin (Amia calva) and eyespot bowfin (Amia ocellicauda), but the group contains many extinct species in several families (including Amiidae, Caturidae, Liodesmidae, Sinamiidae) in the order Amiiformes, as well as the extinct orders Ionoscopiformes, Panxianichthyiformes, and Parasemionotiformes.

The fossil record of halecomorphs goes back at least to the Early Triassic epoch.

The Halecomorphi exhibit a combination of ancestral features, such as most heavily mineralized scales, but also by more derived or "modern" features, particularly in the structure of the skull (e.g. position and shape of preopercles).

[7][8][9][10] Teleostei Ginglymodi (gars and their fossil relatives) Halecomorphi (bowfin and its fossil relatives) The following cladogram[11] summarizes the evolutionary relationships of extinct (indicated with a dagger, †) and living orders of Halecomorphi.

The parasemionotiform † Watsonulus
The ionoscopiform † Ionoscopus
The amiiform † Caturus
The amiiform † Calamopleurus
The amiiform † Sinamia
Skull of Amia calva ( bowfin )