USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL34776
USNM:PAL
Billingsella Robison & Palmer
USNM PAL158032
USNM:PAL
Billingsella obscura Walcott
USNM PAL52258A
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL142397
USNM:PAL
Billingsella corrugata Ulrich & Cooper
USNM PAL91442A E. Ulrich
United States, Oklahoma
USNM:PAL
Billingsella exporrecta rugosicostata Walcott
USNM PAL52250D G. Schmalensee
Sweden
USNM:PAL
Billingsella corrugata inornata Ellinwood
USNM PAL185539
United States, Texas
USNM:PAL
Billingsella exporrecta rugosicostata Walcott
USNM PAL52250B
USNM:PAL
Billingsella corrugata Ellinwood
USNM PAL185538
United States, Texas, San Saba County
USNM:PAL
Xenorthis aequicostellata Ulrich & Cooper
USNM PAL92834B G. Cooper
United States, Maryland
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL91441E
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL185544
United States, Texas, San Saba County
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263E A. Peale
United States, Montana, Gallatin County
USNM:PAL
Billingsella lindstromi (Linnarsson)
USNM PAL52259D
USNM:PAL
Billingsella perfecta pyriformis Bell
USNM PAL111882
United States, Montana
USNM:PAL
Billingsella minima Howell
USNM PAL494519
United States, Vermont
USNM:PAL
Billingsella corrugata inornata Ellinwood
USNM PAL185514
United States, Texas, San Saba County
USNM:PAL
Billingsella bivia Walcott
USNM PAL52254B R. Rowe 1901-00-00
United States, California, Inyo County
USNM:PAL
Billingsella appalachia Walcott
USNM PAL57073A
USNM:PAL
Billingsella plicatella Walcott
USNM PAL142366
USNM:PAL
Billingsella corrugata Ulrich & Cooper
USNM PAL91442F
USNM:PAL
Billingsella archais Walcott
USNM PAL69715 Walcott Et Al
Canada, British Columbia
USNM:PAL
Billingsella rhomba Ellinwood
USNM PAL185530
United States, Texas, San Saba County
USNM:PAL
Billingsella rhomba Ellinwood
USNM PAL185528
United States, Texas, San Saba County
USNM:PAL
Cymbithyris hami Cooper
USNM PAL116724D
USNM:PAL
Billingsella Palmer
USNM PAL123333 Dake & Bridge 1930-00-00
United States, Texas, Burnet County
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL34777A
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL35213D
United States, Wyoming
USNM:PAL
Billingsella weedi (Walcott)
USNM PAL69798A
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL91441J
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52265A A. Peale
United States, Montana, Gallatin County
USNM:PAL
Xenorthis stosei (Bassler)
USNM PAL92836B G. Cooper
United States, Maryland
USNM:PAL
Billingsella striata Walcott
USNM PAL52279C A. Peale
United States, Montana, Madison County
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL91441K
USNM:PAL
Billingsella corrugata Ulrich & Cooper
USNM PAL91442I E. Ulrich
United States, Oklahoma
USNM:PAL
Xenorthis jonasae Ulrich & Cooper
USNM PAL92835F G. Cooper
United States, Maryland
USNM:PAL
Billingsella anomala Walcott
USNM PAL52233B Curtice
United States, Alabama, Cherokee County
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL91441D E. Kirk
United States, Wyoming
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL111884
United States, Montana
USNM:PAL
Billingsella borukaevi Nikitin
USNM PAL406065
Antarctica
USNM:PAL
Billingsella origin Walcott
USNM PAL69809
Canada, British Columbia
USNM:PAL
Billingsella corrugata Ulrich & Cooper
USNM PAL91442L
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL34776E
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL34771C
USNM:PAL
Billingsella saffordi Walcott
USNM PAL52268A Campbell
United States, Tennessee
USNM:PAL
Billingsella appalachia Walcott
USNM PAL57073A C. Walcott
United States, Tennessee, Hawkins County
USNM:PAL
Billingsella corrugata Ulrich & Cooper
USNM PAL91442E E. Ulrich
United States, Oklahoma
USNM:PAL
Billingsella pumpellyi Walcott
USNM PAL52558B Blackwelder & Willis
China, Shantung
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL34771B
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263K
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL91441R E. Kirk
United States, Wyoming
USNM:PAL
Billingsella exporrecta (Linnarsson)
USNM PAL52249M
USNM:PAL
Billingsella corrugata Ulrich & Cooper
USNM PAL91442B E. Ulrich
United States, Oklahoma
USNM:PAL
Xenorthis jonasae Ulrich & Cooper
USNM PAL92835E
USNM:PAL
Billingsella harlanensis Walcott
USNM PAL52252 C. Walcott
United States, Tennessee, Hawkins County
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL91441O E. Kirk
United States, Wyoming
USNM:PAL
Billingsella corrugata inornata Ellinwood
USNM PAL185533
United States, Texas
USNM:PAL
Billingsella corrugata Ulrich & Cooper
USNM PAL91442E
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL35213D
USNM:PAL
Billingsella lindstromi (Linnarsson)
USNM PAL52259B
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL34777C
USNM:PAL
Billingsella marion Walcott
USNM PAL53676B
USNM:PAL
Billingsella dice Walcott
USNM PAL52248B
United States, Vermont, Franklin County
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263I A. Peale
United States, Montana, Gallatin County
USNM:PAL
Billingsella romingeri (Barrande)
USNM PAL52267G
USNM:PAL
Billingsella exporrecta (Linnarsson)
USNM PAL52249H
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263J A. Peale
United States, Montana, Gallatin County
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL185542
United States, Texas, Llano County
USNM:PAL
Billingsella striata Walcott
USNM PAL52279A
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263J
USNM:PAL
Xenorthis stosei (Bassler)
USNM PAL92836A
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263A
USNM:PAL
Billingsella highlandensis (Walcott)
USNM PAL15355C
USNM:PAL
Billingsella striata Walcott
USNM PAL52279 A. Peale
United States, Montana, Madison County
USNM:PAL
Billingsella exporrecta rugosicostata Walcott
USNM PAL52250B G. Schmalensee
Sweden
USNM:PAL
Billingsella archais Walcott
USNM PAL69719 Walcott Et Al
Canada, British Columbia
USNM:PAL
Xenorthis jonasae Ulrich & Cooper
USNM PAL92835B G. Cooper
United States, Maryland
USNM:PAL
Xenorthis jonasae Ulrich & Cooper
USNM PAL92835C
USNM:PAL
Billingsella plicatella Walcott
USNM PAL142367
USNM:PAL
Billingsella corrugata Ulrich & Cooper
USNM PAL91442F E. Ulrich
United States, Oklahoma
USNM:PAL
Xenorthis stosei (Bassler)
USNM PAL66164
USNM:PAL
Billingsella willisi Resser & Endo
USNM PAL86710 R. Endo
China, Manchoukuo Prov
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL34777B
USNM:PAL
Billingsella romingeri (Barrande)
USNM PAL52267H
USNM:PAL
Billingsella exporrecta (Linnarsson)
USNM PAL52249C
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263F A. Peale
United States, Montana, Gallatin County
USNM:PAL
Billingsella richthofeni Walcott
USNM PAL52559A Blackwelder
China, Shantung
USNM:PAL
Billingsella origin Walcott
USNM PAL69807
Canada, British Columbia
USNM:PAL
Billingsella corrugata Ellinwood
USNM PAL185534
United States, Texas, San Saba County
USNM:PAL
Billingsella romingeri (Barrande)
USNM PAL52267A
USNM:PAL
Billingsella texana Bell in Bell & Ellinwood
USNM PAL185526
United States, Texas, Blanco County
USNM:PAL
Billingsella corrugata Ulrich & Cooper
USNM PAL91442J
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263B
USNM:PAL
Billingsella exporrecta (Linnarsson)
USNM PAL52249J
USNM:PAL
Xenorthis stosei (Bassler)
USNM PAL66164C
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL35213E
United States, Wyoming
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263A
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL91441F
USNM:PAL
Billingsella bivia Walcott
USNM PAL51404A Campbell & Rowe 1901-00-00
United States, California, Inyo County
USNM:PAL
Billingsella harlanensis Walcott
USNM PAL52252A C. Walcott
United States, Tennessee, Hawkins County