Robuta

https://alangoldsteinsuniverse.com/faunal-list-of-middle-mississippian-shark-teeth-spines-etc/ Faunal List of Middle Mississippian Shark Teeth, Spines, Etc. list ofmiddle mississippianshark teethfaunalspines https://alangoldsteinsuniverse.com/microfossils-of-the-middle-mississippian-salem-limestone-midwest-u-s-a/ Microfossils of the Middle Mississippian Salem Limestone: Midwest U.S.A.* u s aof themiddle mississippiansalem limestonemicrofossils