Dover Mills (Ordovician of the United States)

Where: Iowa (43.0° N, 91.7° W: paleocoordinates 19.3° S, 60.0° W)

When: Amorphognathus ordovicicus conodont zone, Elgin Member (Scales Shale Formation), Richmondian (449.6 - 445.5 Ma)

• member-level stratigraphic resolution

Environment/lithology: limestone

Size class: macrofossils

Primary reference: H. S. Ladd. 1925. Depauperate fauna of the Maquoketa. Geological Society of America Bulletin 36(1):1-228 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 172795: authorized by Pete Wagner, entered by Pete Wagner on 23.08.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Solemyida - Ctenodontidae
Ctenodonta calvini
Gastropoda
 Euomphalina - Platyceratidae
Cyclonema bilix
Cyclonema bilix Conrad 1842 snail
 Murchisoniina - Hormotomidae
Hormotoma gracilis
Hormotoma gracilis Hall 1847 snail
Hormotoma gracilis multivolvis
 Murchisoniina - Lophospiridae
"Lophospira quadrisulcata" = Eunema quadrisulcata
"Lophospira quadrisulcata" = Eunema quadrisulcata Ulrich and Scofield 1897 snail
 Murchisoniina - Phanerotrematidae
"Plethospira semele" = Brachytomaria semele
"Plethospira semele" = Brachytomaria semele Hall 1861 snail
 Bellerophontida - Sinuitidae
"Protowarthia concinna" = Sinuites subcompressa
"Protowarthia concinna" = Sinuites subcompressa Ulrich and Scofield 1897 snail
Tergomya
 Archinacellida - Archinacellidae
Archinacella rotunda
Archinacella rotunda Ulrich and Scofield 1897