USNM:PAL
Psammodus glyptus St.John & Worthen
USNM V13041 F. Springer
United States, Illinois, Henderson County
USNM:PAL
Psammodus springeri St.John & Worthen
USNM V14797 F. Springer
United States, Iowa
USNM:PAL
Psammodus springeri St.John & Worthen
USNM V14282 F. Springer
United States, Illinois, Henderson County
USNM:PAL
Psammodus springeri St.John & Worthen
USNM V13510 O. St.John
United States, Iowa
USNM:PAL
Psammodus caelatus St.John & Worthen
USNM V13040 W. Van Horne
United States, Iowa
USNM:PAL
Psammodus plenus St.John & Worthen
USNM V14268 G. Hambach
United States
USNM:PAL
Psammodus angularis Newberry & Worthen
USNM V14798 C. Wachsmuth
United States, Illinois
USNM:PAL
Psammodus crassidens St.John & Worthen
USNM V13039 O. St.John
United States, Iowa
USNM:PAL
Psammodus glyptus St.John & Worthen
USNM V14267 O. St.John
United States, Iowa
USNM:PAL
Psammodus porosus (Agassiz)
USNM V14286
Ireland
USNM:PAL
Psammodus tumidus St.John & Worthen
USNM V13032 F. Springer
United States, Iowa, Louisa County
USNM:PAL
Psammodus porosus (Agassiz)
USNM V14288
United States, Iowa
USNM:PAL
Psammodus
USNM V15155
United States, Kentucky
USNM:PAL
Psammodus
USNM PAL339407 O. St.John 1867-08-31
United States, Iowa, Dallas County
USNM:PAL
Psammodus grandis St.John & Worthen
USNM V21379 J. Burke 1956-07-15
United States, Maryland, Garrett County
USNM:PAL
Psammodus plenus St.John & Worthen
USNM V19103 O. St.John
United States, Missouri
USNM:PAL
Psammodus lovianus St.John & Worthen
USNM V14271 F. Springer
United States, Iowa, Des Moines County
USNM:PAL
Psammodus grandis St.John & Worthen
USNM V13044 F. Springer
United States, Iowa
USNM:PAL
Psammodus springeri St.John & Worthen
USNM V14793 F. Springer
United States, Iowa
USNM:PAL
Psammodus lovianus St.John & Worthen
USNM V13037 O. St.John
United States, Iowa
USNM:PAL
Psammodus grandis St.John & Worthen
USNM PAL339412 J. Burke 1957-11-00
United States, Maryland, Garrett County
USNM:PAL
Psammodus plenus St.John & Worthen
USNM V13028 W. Van Horne
United States, Illinois
USNM:PAL
Psammodus porosus (Agassiz)
USNM V14289
United States, Iowa
USNM:PAL
Psammodus
USNM PAL464144 G. Hambach
United States, Missouri
USNM:PAL
Psammodus springeri St.John & Worthen
USNM V14829 O. St.John 1868-00-00
United States, Iowa, Louisa County
USNM:PAL
Psammodus lovianus St.John & Worthen
USNM V14270 F. Springer
United States, Iowa, Des Moines County
USNM:PAL
Psammodus lovianus St.John & Worthen
USNM V14274 C. Wachsmuth
United States, Iowa
USNM:PAL
Psammodus crassidens St.John & Worthen
USNM V13038 W. Van Horne
United States, Illinois
USNM:PAL
Psammodus plenus St.John & Worthen
USNM V14276 G. Hambach
United States
USNM:PAL
Psammodus tumidus St.John & Worthen
USNM V13034 O. St.John
United States, Iowa, Louisa County
USNM:PAL
Psammodus plenus St.John & Worthen
USNM V13027 W. Van Horne
United States, Illinois
USNM:PAL
Psammodus springeri St.John & Worthen
USNM V13511 F. Springer
United States, Iowa, Louisa County
USNM:PAL
Psammodus springeri St.John & Worthen
USNM V13509 O. St.John
United States, Iowa
USNM:PAL
Psammodus turgidus St.John & Worthen
USNM V13042 O. St.John
United States, Iowa, Des Moines County
USNM:PAL
Psammodus plenus St.John & Worthen
USNM V14278 G. Hambach
United States
USNM:PAL
Psammodus springeri St.John & Worthen
USNM V13508 F. Springer
United States, Iowa, Louisa County
USNM:PAL
Psammodus springeri St.John & Worthen
USNM V14285 O. St.John
United States, Iowa
USNM:PAL
Psammodus specularis Unknown
USNM V3537 E. Zickendrath
Russia
USNM:PAL
Psammodus angustus Romanowski
USNM V3538 E. Zickendrath
Russia
USNM:PAL
Psammodus lovianus St.John & Worthen
USNM V14273 O. St.John
United States, Iowa
USNM:PAL
Psammodus plenus St.John & Worthen
USNM V8387
United States, Missouri
USNM:PAL
Psammodus springeri St.John & Worthen
USNM V14825 O. St.John
United States, Iowa, Louisa County
USNM:PAL
Psammodus tumidus St.John & Worthen
USNM V13035 O. St.John
United States, Iowa, Louisa County
USNM:PAL
Psammodus plenus St.John & Worthen
USNM V13025 W. Van Horne
United States, Illinois
USNM:PAL
Psammodus lovianus St.John & Worthen
USNM V14272 F. Springer
United States, Iowa, Des Moines County
USNM:PAL
Psammodus springeri St.John & Worthen
USNM V14826 O. St.John
United States, Iowa
USNM:PAL
Psammodus springeri St.John & Worthen
USNM V14284 O. St.John
United States, Iowa
USNM:PAL
Psammodus lovianus St.John & Worthen
USNM V13036 C. Wachsmuth
United States, Iowa
USNM:PAL
Psammodus tumidus St.John & Worthen
USNM V13033 F. Springer
United States, Iowa, Louisa County
USNM:PAL
Psammodus springeri St.John & Worthen
USNM V13507 O. St.John
United States, Iowa, Louisa County
USNM:PAL
Psammodus springeri St.John & Worthen
USNM V14828 O. St.John
United States, Illinois
USNM:PAL
Psammodus plenus St.John & Worthen
USNM V13030 O. St.John
United States, Missouri
USNM:PAL
Psammodus rugosus Agassiz
USNM V16123
Ireland
USNM:PAL
Psammodus springeri St.John & Worthen
USNM V14283 O. St.John
United States, Iowa
USNM:PAL
Psammodus
USNM V14817 Van Horne
United States, Iowa
USNM:PAL
Psammodus plenus St.John & Worthen
USNM V13031 W. Van Horne
United States, Illinois
USNM:PAL
Psammodus rugosus Agassiz
USNM V14796
Ireland
USNM:PAL
Psammodus plenus St.John & Worthen
USNM V14275 G. Hambach
United States
USNM:PAL
Psammodus
USNM V4622
Belgium
USNM:PAL
Psammodus grandis St.John & Worthen
USNM V13045 L. Cox
United States, Iowa
USNM:PAL
Psammodus tumidus St.John & Worthen
USNM V14799 F. Springer
United States, Iowa
USNM:PAL
Psammodus tumidus St.John & Worthen
USNM V14280 F. Springer
United States, Iowa
USNM:PAL
Psammodus springeri St.John & Worthen
USNM PAL339408 1869-07-07
United States, Iowa, Appanoose County
USNM:PAL
Psammodus turgidus St.John & Worthen
USNM V13043 F. Springer 1868-00-00
United States, Iowa, Louisa County
USNM:PAL
Psammodus tumidus St.John & Worthen
USNM V14279 C. Wachsmuth
United States, Iowa
USNM:PAL
Psammodus springeri St.John & Worthen
USNM V14827 O. St.John
United States, Iowa
USNM:PAL
Psammodus
USNM V16448
England
USNM:PAL
Psammodus plenus St.John & Worthen
USNM V14277 G. Hambach
United States
USNM:PAL
Psammodus reticulatus Newberry & Worthen
USNM V14266 G. Hambach
United States, Illinois
USNM:PAL
Psammodus angustus Romanowski
USNM V4625
Belgium
USNM:PAL
Psammodus grandis St.John & Worthen
USNM V3501 L. Cox
United States, Iowa
USNM:PAL
Psammodus plenus St.John & Worthen
USNM V13026 W. Van Horne
United States, Illinois
USNM:PAL
Mazodus kepleri Newberry
USNM V14863 R. Bassler
United States, Iowa
USNM:PAL
Psammodus springeri St.John & Worthen
USNM V14287 F. Springer
United States, Iowa