Discoserra Explained

Discoserra ("serrated disc") is a prehistoric ray-finned fish from the Mississippian of the Bear Gulch Limestone in Montana. It is a member of the Guildayichthyiformes with a round body and a skull possessing primitive and modern traits.^{[1] [2]} Discoserra is about 60 mm long.^[3] In 2006, Discoserra was hypothesized to be a stem neopterygian,^[4] although it has alternatively been placed in Cladistia along with other Guildayichthyiformes.^[5]

References

1. Lund, Richard. The new Actinopterygian order Guildayichthyiformes from the Lower Carboniferous of Montana (USA). Geodiversitas. 2000. 22. 2.
2. Richard Lund, Eileen Grogan, Geodiversitas, 2006
3. http://www.fossilmuseum.net/Fossil_Sites/beargulch/discoserra/discoserra.htm Fossil Museum
4. Kathryn E. Mickle, Unraveling the systematics of palaeoniscoid fish
5. Mikko Haaramo . Cladistia – bichirs and relatives. Mikko's Phylogeny Archive. 2013-10-26.