Discoserra

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]

Discoserra pectinodon Temporal range: Mississippian PreꞒ Ꞓ O S D C P T J K Pg N
Fossil specimen in the Natural History Museum, Vienna
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	†Guildayichthyiformes
Family:	†Guildayichthyidae
Genus:	†Discoserra Lund, 2000
Type species
Discoserra pectinodon Lund, 2000