Parasemionotiformes in the context of "Halecomorphi"

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👉 Parasemionotiformes in the context of 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, Ophiopsiformes, 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). Unique derived traits (synapomorphies) of the Halecomorphi include:

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Parasemionotiformes in the context of Archaeolepidotus

Archaeolepidotus is an extinct genus of prehistoric marine holostean bony fish that lived during the latest Permian or earliest Triassic in what is now Trentino-Alto Adige, Italy. It contains a single species, A. leonardii. It is among the earliest known fossil neopterygians, and is usually recovered as a semionotiform, but others recover it as a parasemionotiform.

Although initially recovered as being from the Early Triassic Werfen Formation, more recent analyses suggest that it is very unlikely to be from the Triassic sediments of that formation. It is thus thought to actually originate from the Late Permian Bellerophon Formation, making it particularly ancient.

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LINKED FROM (PARENTS)
← Halecomorphi ← Archaeolepidotus
LINKS TO (CHILDREN)