Palaeonisciformes
From Wikipedia, the free encyclopedia
| Palaeonisciformes Temporal range: Late Silurian–Early Cretaceous |
|
|---|---|
 |
|
| Acropholis stensioei fossil at the Geological Museum in Copenhagen | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Palaeonisciformes |
| Families | |
Palaeonisciformes is an extinct order of early ray-finned fishes (Actinopterygii). It is not a natural group, but is instead a paraphyletic assemblage of the early members of several ray-finned fish lineages. It has traditionally encompassed most Paleozoic actinopterygians, except those that exhibit strange body forms (such as the deep-bodied Platysomoids, or those assigned definitively to any of the living groups of ray-finned fishes.
Andreolepis hedei has proven so far to be the earliest-known Actinopterygiian, living around 420 million years ago (Late Silurian in Russia, Sweden, Estonia, and Latvia. Actinopterygians underwent an extensive diversification during the Carboniferous, after the end-Devonian Hangenberg extinction.
[edit] Timeline of genera
[edit] References
- Andreolepis (Actinopterygii) in the Upper Silurian of Northern Eurasia
- Gardiner BG, Schaeffer B, and Masserie JG. 2005. A review of lower actinopterygian phylogeny. 'Zoological Journal of the Linnean Society' 144:511-525.
- Sallan LC, Coates MI. 2010. End-Devonian extinction and a bottleneck in the evolution of modern jawed vertebrates. 'PNAS' 107:10131-10135.
- Palaeonisciformes at University of Bristol
- Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology 364: p.560. http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=611&rank=class. Retrieved 2011-05-17.
