USNM:PAL
Billingsella major Walcott
USNM PAL52256 J. James
United States, Wisconsin, Sauk County
USNM:PAL
Billingsella exporrecta (Linnarsson)
USNM PAL52249B
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL34774C
USNM:PAL
Billingsella exporrecta (Linnarsson)
USNM PAL52249G
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL34776A
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263D A. Peale
United States, Montana, Gallatin County
USNM:PAL
Billingsella pumpellyi Walcott
USNM PAL52557A Blackwelder & Willis
China, Shantung
USNM:PAL
Xenorthis jonasae Ulrich & Cooper
USNM PAL92835B
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL91441A E. Kirk
United States, Wyoming
USNM:PAL
Billingsella exporrecta (Linnarsson)
USNM PAL52249D
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52265B A. Peale
United States, Montana, Gallatin County
USNM:PAL
Billingsella obscura Walcott
USNM PAL52258A C. Walcott
United States, Arizona
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL91441C
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL91441M E. Kirk
United States, Wyoming
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL34776F
USNM:PAL
Billingsella harlanensis Walcott
USNM PAL52252C C. Walcott
United States, Tennessee, Hawkins County
USNM:PAL
Billingsella anomala Walcott
USNM PAL52233E Curtice
United States, Alabama, Cherokee County
USNM:PAL
Billingsella pumpellyi Walcott
USNM PAL52557B
USNM:PAL
Billingsella corrugata Ulrich & Cooper
USNM PAL91442L E. Ulrich
United States, Oklahoma
USNM:PAL
Billingsella orientalis (Whitfield)
USNM PAL52262A
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263F
USNM:PAL
Xenorthis stosei (Bassler)
USNM PAL66164C
USNM:PAL
Billingsella corrugata Ulrich & Cooper
USNM PAL91442 E. Ulrich
United States, Oklahoma
USNM:PAL
Xenorthis stosei (Bassler)
USNM PAL66164A
USNM:PAL
Billingsella exporrecta (Linnarsson)
USNM PAL52249E
USNM:PAL
Billingsella lindstromi (Linnarsson)
USNM PAL52259G
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL91441O
USNM:PAL
Billingsella lindstromi (Linnarsson)
USNM PAL52259C
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL91441T E. Kirk
United States, Wyoming
USNM:PAL
Billingsella rhomba Ellinwood
USNM PAL185527
United States, Texas, San Saba County
USNM:PAL
Billingsella orientalis (Whitfield)
USNM PAL52262B
USNM:PAL
Billingsella appalachia Walcott
USNM PAL57073C C. Walcott
United States, Tennessee, Hawkins County
USNM:PAL
Billingsella highlandensis (Walcott)
USNM PAL15355B
USNM:PAL
Billingsella lindstromi (Linnarsson)
USNM PAL52260
USNM:PAL
Xenorthis stosei (Bassler)
USNM PAL92836A G. Cooper
United States, Maryland
USNM:PAL
Billingsella borukaevi Nikitin
USNM PAL406068
Antarctica
USNM:PAL
Billingsella weedi (Walcott)
USNM PAL69798B
USNM:PAL
Billingsella corrugata Ulrich & Cooper
USNM PAL91442G E. Ulrich
United States, Oklahoma
USNM:PAL
Billingsella richthofeni Walcott
USNM PAL52559A
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL91441Q E. Kirk
United States, Wyoming
USNM:PAL
Billingsella dice Walcott
USNM PAL52248A
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263H
USNM:PAL
Billingsella lindstromi (Linnarsson)
USNM PAL52259F
USNM:PAL
Billingsella lindstromi (Linnarsson)
USNM PAL52259E
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263C A. Peale
United States, Montana, Gallatin County
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL91441L E. Kirk
United States, Wyoming
USNM:PAL
Billingsella bivia Walcott
USNM PAL51404 Campbell & Rowe 1901-00-00
United States, California, Inyo County
USNM:PAL
Billingsella major Walcott
USNM PAL52256B
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL52235B
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL91441G E. Kirk
United States, Wyoming
USNM:PAL
Billingsella texana Bell in Bell & Ellinwood
USNM PAL185521
United States, Texas
USNM:PAL
Billingsella weedi (Walcott)
USNM PAL69798D
USNM:PAL
Billingsella pumpellyi Walcott
USNM PAL52557A
USNM:PAL
Billingsella romingeri (Barrande)
USNM PAL52267E
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263J
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263H A. Peale
United States, Montana, Gallatin County
USNM:PAL
Xenorthis jonasae Ulrich & Cooper
USNM PAL92835D
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL34774A
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL185545
United States, Texas, Blanco County
USNM:PAL
Billingsella dice Walcott
USNM PAL52248D
USNM:PAL
Billingsella aojii Resser & Endo
USNM PAL86708B R. Endo
China, Manchoukuo Prov
USNM:PAL
Billingsella borukaevi Nikitin
USNM PAL406066
Antarctica
USNM:PAL
Billingsella exporrecta (Linnarsson)
USNM PAL52249N
USNM:PAL
Billingsella corrugata Ulrich & Cooper
USNM PAL91442C E. Ulrich
United States, Oklahoma
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263L A. Peale
United States, Montana, Gallatin County
USNM:PAL
Billingsella texana Bell in Bell & Ellinwood
USNM PAL185517
United States, Texas, Mason-Gillespie County
USNM:PAL
Billingsella salemensis (Walcott)
USNM PAL17443B
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263K
USNM:PAL
Billingsella exporrecta rugosicostata Walcott
USNM PAL52250C G. Schmalensee
Sweden
USNM:PAL
Billingsella corrugata Ulrich & Cooper
USNM PAL91442M E. Ulrich
United States, Oklahoma
USNM:PAL
Billingsella romingeri (Barrande)
USNM PAL52267I
USNM:PAL
Billingsella corrugata Ulrich & Cooper
USNM PAL91442J E. Ulrich
United States, Oklahoma
USNM:PAL
Billingsella plicatella Walcott
USNM PAL52263I
USNM:PAL
Billingsella rectangulata Cooper
USNM MO116722A
USNM:PAL
Billingsella coloradoensis (Shumard)
USNM PAL34777E
USNM:PAL
Billingsella exporrecta rugosicostata Walcott
USNM PAL52250A G. Schmalensee
Sweden
USNM:PAL
Xenorthis jonasae Ulrich & Cooper
USNM PAL92835D G. Cooper
United States, Maryland
USNM:PAL
Billingsella texana Bell in Bell & Ellinwood
USNM PAL185524
United States, Texas, Blanco County
USNM:PAL
Billingsella corrugata Ulrich & Cooper
USNM PAL91442G
USNM:PAL
Billingsella perfecta Ulrich & Cooper
USNM PAL91441P E. Kirk
United States, Wyoming