Yeager farm, 3 miles northwest of Frankford (Ordovician of the United States)

Where: Ralls County, Missouri (39.5° N, 91.4° W: paleocoordinates 22.5° S, 66.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Phragmodus undatus conodont zone, Zell Member (Macy Formation), Turinian (457.3 - 453.8 Ma)

• Given as top of Plattin, which is the Zell member of the Macy Formation now.

• member-level stratigraphic resolution

Environment/lithology: limestone

Size class: macrofossils

Primary reference: A. F. Foerste. 1920. The Kimmswick and Plattin Limestones of Northeastern Missouri. Bulletin of the Scientific Laboratories of Denison University 19:175-226 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 181091: authorized by Pete Wagner, entered by Pete Wagner on 19.08.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Florideophyceae
  -
"Tetradium fibratum" = Prismostylus fibratum
"Tetradium fibratum" = Prismostylus fibratum Safford 1856
Tergomya
 Cyrtonellida - Cyrtolitidae
Cyrtolites retrorsus
Cyrtolites retrorsus Ulrich and Scofield 1897
Cephalopoda
 Pseudorthocerida - Spyroceratidae
Spyroceras bilineatum
Gastropoda
 Euomphalina - Helicotomidae
Helicotoma planulata
Helicotoma planulata Salter 1859 snail
 Bellerophontida - Bucaniidae
"Phragmolites fimbriatus" = Phragmolites fimbriata
"Phragmolites fimbriatus" = Phragmolites fimbriata Ulrich and Scofield 1897 snail
 Murchisoniina - Subulitidae
Subulites conradi
Subulites conradi Ulrich and Scofield 1897 snail
 Murchisoniina - Eotomariidae
Clathrospira subconica, Liospira obtusa
Clathrospira subconica Hall 1847 snail
Liospira obtusa Ulrich and Scofield 1897 snail
 Murchisoniina - Hormotomidae
Hormotoma gracilis
Hormotoma gracilis Hall 1847 snail
Hormotoma gracilis angustata
Bivalvia
 Modiomorphida - Modiomorphidae
"Parallelodus obliqua" = Parallelodus obliquus
"Parallelodus obliqua" = Parallelodus obliquus Branson 1909 clam
 Cyrtodontida - Cyrtodontidae
Cyrtodonta huronensis
Cyrtodonta huronensis Billings 1858 clam
Lingulata
 Lingulida - Trematidae
Trematis huronensis
Trematis huronensis Billings 1865
Rhynchonellata
 Atrypida - Anazygidae
Zygospira deflecta
 Atrypida - Protozygidae
"Zygospira nicolleti" = Manespira nicolleti
"Zygospira nicolleti" = Manespira nicolleti Winchell and Schuchert 1892
 Orthida - Hesperorthidae
"Orthis tricenaria" = Hesperorthis tricenaria
"Orthis tricenaria" = Hesperorthis tricenaria Conrad 1843
 Orthida - Draboviidae
Pionodema subaequata
Strophomenata
 Strophomenida - Plectambonitidae
Plectambonites sericeus
Trilobita
 Proetida - Bathyuridae
"Bathyurus spiniger" = Bathyurus (Raymondites) spiniger
"Bathyurus spiniger" = Bathyurus (Raymondites) spiniger Hall 1847 trilobite