USNM:PAL
Spirifera camerata Morton
USNM PAL174476 C. Hartt & O. Derby
Brazil, Para
USNM:PAL
Neospirifer mansuetus Cooper & Grant
USNM PAL152913A
United States, Texas, Brewster County
USNM:PAL
Spirifer chappelensis Carter
USNM PAL154830
United States, Texas, McCulloch County
USNM:PAL
Spirifer oweni Hall
USNM PAL51201
USNM:PAL
Spirifer louisianensis Rowley
USNM PAL278854 A. Armstrong
United States, New Mexico
USNM:PAL
Spirifer sparsus Clarke
USNM PAL59746
USNM:PAL
Neospirifer cameratus (Morton)
USNM PAL380726
United States, Illinois, St. Clair County
USNM:PAL
Spirifer grimesi Hall
USNM PAL263428 A. Armstrong 1956-00-00
United States, New Mexico
USNM:PAL
Spirifer bimesialis Hall
USNM PAL33965 T. Stanton 1889-00-00
United States, Colorado
USNM:PAL
Spirifer disjunctus var. animasensis Girty
USNM PAL33960C A. Spencer 1898-00-00
United States, Colorado, La Plata County
USNM:PAL
Brachythyrina washakiensis Gordon
USNM PAL167763
United States, Wyoming, Teton County
USNM:PAL
Spirifer (Martinia) glaber var. contracta Meek & Worthen
USNM PAL8483A
USNM:PAL
Spirifer imbrex Hall
USNM MO659624
USNM:PAL
Neospirifer thescelus Cooper & Grant
USNM PAL152916L
United States, Texas, Brewster County
USNM:PAL
Neospirifer amphigyus Cooper & Grant
USNM PAL154596A
United States, Texas, Brewster County
USNM:PAL
Anthracospirifer tanoensis Sutherland & Harlow
USNM PAL256827
United States, Arizona
USNM:PAL
Spirifer shoshonensis Branson & Greger
USNM PAL118809
USNM:PAL
Spirifer medialis Hall
USNM PAL51205
USNM:PAL
Neospirifer mansuetus Cooper & Grant
USNM PAL154615B
United States, Texas, Brewster County
USNM:PAL
Spirifer mucronatus Conrad
USNM PAL85968
USNM:PAL
Spirifer chappelensis Carter
USNM PAL154825
United States, Texas, McCulloch County
USNM:PAL
Neospirifer formulosus Cooper & Grant
USNM PAL152906H
United States, Texas, Brewster County
USNM:PAL
Prospira greenockensis (Brown)
USNM PAL176855
United States, Iowa, Pocahontas County
USNM:PAL
Spirifer (Trigonotreta) pinonensis Meek
USNM PAL124502
USNM:PAL
Unispirifer greenockensis (Brown)
USNM PAL557941 E. McKee & R. Gutschick
United States, Arizona
USNM:PAL
Neospirifer mansuetus Cooper & Grant
USNM PAL152912C
United States, Texas, Brewster County
USNM:PAL
Spirifera (Martinia) maia Billings
USNM PAL13834C C. Walcott
United States, Nevada, Eureka District
USNM:PAL
Spirifer mesastrialis Hall
USNM PAL4251 R. Howell
United States, New York, Tioga County
USNM:PAL
Spirifera (Martinia) undifera (Roemer)
USNM PAL13839A C. Walcott
United States, Nevada, Eureka District
USNM:PAL
Anthracospirifer curvilateralis brutus Gordon
USNM PAL167737
United States, Wyoming, Lincoln County
USNM:PAL
Neospirifer formulosus Cooper & Grant
USNM PAL152906F
United States, Texas, Brewster County
USNM:PAL
Spirifer carinatus Rowley
USNM PAL121142
USNM:PAL
Spirifer bifurcatus Hall
USNM PAL71633A C. Butts
United States, Alabama, Lauderdale County
USNM:PAL
Spirifer Girty
USNM PAL61980 Blackwelder 1904-05-30
China, East Ssi-Chuan
USNM:PAL
Spirifer engelmanni Meek
USNM PAL7748A
USNM:PAL
Prospira sp b Carter et al.
USNM PAL557954 E. McKee & R. Gutschick
United States, Arizona
USNM:PAL
Neospirifer formulosus Cooper & Grant
USNM PAL152909G
United States, Texas, Brewster County
USNM:PAL
Spirifer macrus Hall
USNM PAL97912A Butts & Edmundson
United States, Virginia, Washington County
USNM:PAL
Spirifer disjunctus var. animasensis Girty
USNM PAL180900 A. Spencer 1898-00-00
United States, Colorado, La Plata County
USNM:PAL
Spirifer disjunctus var. animasensis Girty
USNM PAL180879 Cross & Spencer 1898-00-00
United States, Colorado
USNM:PAL
Spirifera striata (Martin)
USNM PAL14223 J. Clayton
United States, Utah
USNM:PAL
Spirifer granulosus (Conrad)
USNM PAL97961C C. Butts
United States, Virginia, Shenandoah County
USNM:PAL
Prospira legrandensis (Weller)
USNM PAL176857
United States, Iowa, Pocahontas County
USNM:PAL
Spirifer (Delthyris) mesacostalis Hall
USNM PAL177415 Maryland Geological Survey
United States, Maryland, Allegany County
USNM:PAL
Spirifer gorei Mather
USNM PAL476645 O. Tweto 1953-00-00
United States, Colorado, Park County
USNM:PAL
Parallelora marionensis (Hall)
USNM PAL181165
United States, Missouri
USNM:PAL
Spirifer centronatus Winchell
USNM PAL14224
USNM:PAL
Parallelora marionensis (Hall)
USNM PAL181163
United States, Missouri, Pike County
USNM:PAL
Spirifer rockymontanus Marcou
USNM PAL35320
USNM:PAL
Parallelora marionensis (Hall)
USNM PAL181170
United States, Missouri
USNM:PAL
Spirifer (Eospirifer) nobilis Barrande
USNM PAL96666
USNM:PAL
Neospirifer amphigyus Cooper & Grant
USNM PAL154597
United States, Texas, Brewster County
USNM:PAL
Spirifera engelmanni Meek
USNM PAL7748
USNM:PAL
Neospirifer venezuelensis (Gerth)
USNM PAL221497 P. Hoover
Venezuela, Merida
USNM:PAL
Neospirifer formulosus Cooper & Grant
USNM PAL152908M
United States, Texas, Brewster County
USNM:PAL
Neospirifer mansuetus Cooper & Grant
USNM PAL152913C
United States, Texas, Brewster County
USNM:PAL
Fusella llanoensis Carter
USNM PAL154849
United States, Texas, McCulloch County
USNM:PAL
Spirifer sp b Girty
USNM PAL121458 Blackwelder 1904-05-30
China, East Ssi-Chuan
USNM:PAL
Neospirifer apothescelus Cooper & Grant
USNM PAL152899G
United States, Texas, Brewster County
USNM:PAL
Neospirifer formulosus Cooper & Grant
USNM PAL152909R
United States, Texas, Brewster County
USNM:PAL
Spirifera leidyi Norwood & Pratten
USNM PAL14324A C. Walcott
United States, Nevada, Eureka District
USNM:PAL
Spirifer increbescens Hall
USNM PAL118807
USNM:PAL
Spirifer pennatus Owen
USNM PAL62173
USNM:PAL
Neospirifer apothescelus Cooper & Grant
USNM PAL152901A
United States, Texas, Brewster County
USNM:PAL
Spirifer sp b Girty
USNM PAL183551 1904-00-00
China, East Ssi-Chuan
USNM:PAL
Anthracospirifer rawlinsensis Gordon
USNM PAL167753
United States, Wyoming, Carbon County
USNM:PAL
Spirifer macra (Hall)
USNM PAL126732 R. Finks
United States, New York, Orange County
USNM:PAL
Neospirifer triplicatus (Hall)
USNM PAL263348 J. Gehrig 1953-07-00
United States, New Mexico, Sierra County
USNM:PAL
Spirifera (Martinia) undifera (Roemer)
USNM PAL13840
USNM:PAL
Spirifer rockymontanus Marcou
USNM PAL8488B Wheeler Survey 1871-00-00
United States, New Mexico
USNM:PAL
Neospirifer formulosus Cooper & Grant
USNM PAL152909B
United States, Texas, Brewster County
USNM:PAL
Neospirifer apothescelus Cooper & Grant
USNM PAL152899A
United States, Texas, Brewster County
USNM:PAL
Neospirifer bakeri bakeri King
USNM PAL152904T
United States, Texas, Brewster County
USNM:PAL
Spirifer mesastrialis Hall
USNM PAL89762
USNM:PAL
Spirifer crawfordsvillensis Weller
USNM PAL71611 C. Butts
United States, Alabama, Calhoun County
USNM:PAL
Spirifer disjunctus var. animasensis Girty
USNM PAL9587
United States, Colorado, Gunnison County
USNM:PAL
Spirifer (Delthyris) mesacostalis Hall
USNM PAL177078 Maryland Geological Survey
United States, Maryland, Garrett County
USNM:PAL
Spirifer cameratus Morton
USNM PAL181243 Wheeler Survey 1871-00-00
United States, Utah
USNM:PAL
Spirifer arenosus (Conrad)
USNM PAL59735
USNM:PAL
Fusella llanoensis Carter
USNM PAL154839
United States, Texas, McCulloch County
USNM:PAL
Spirifer mucronatus var. posterus Hall & Clarke
USNM PAL177298 Maryland Geological Survey
United States, Maryland, Washington County
USNM:PAL
Spirifer arctisegmentus Hall
USNM PAL51194
USNM:PAL
Eliva shumardi Cooper & Grant
USNM PAL118588A
United States, Texas
USNM:PAL
Spirifer disjunctus var. animasensis Girty
USNM PAL33960D A. Spencer 1898-00-00
United States, Colorado, La Plata County
USNM:PAL
Spirifer consobrinus (d'Orbigny)
USNM PAL177129 Maryland Geological Survey
United States, Maryland, Allegany County
USNM:PAL
Spirifer conradana Miller
USNM PAL51211
USNM:PAL
Spirifer acuminatus (Conrad)
USNM PAL51196
USNM:PAL
Neospirifer neali Cooper & Grant
USNM PAL154608B
United States, Texas, Culberson County
USNM:PAL
Spirifer bifurcatus Hall
USNM PAL98078 Butts & Meacham
United States, Virginia, Smyth County
USNM:PAL
Spirifer duodenarius (Hall)
USNM PAL97937A Butts & Edmundson
United States, Virginia, Smyth County
USNM:PAL
Neospirifer bakeri bakeri King
USNM PAL152904W
United States, Texas, Brewster County
USNM:PAL
Prospira greenockensis (Brown)
USNM PAL176854
United States, Iowa, Pocahontas County
USNM:PAL
Spirifer (Martinia) glabra nevadensis Walcott
USNM PAL13836
USNM:PAL
Spirifer mesastrialis Hall
USNM PAL98013B C. Butts
United States, Virginia, Shenandoah County
USNM:PAL
Spirifer mexicanus Shumard
USNM PAL118588D Hill & Girty 1901-09-00
United States, Texas, Culberson County
USNM:PAL
Spirifer (Trigonotreta) cameratus Morton
USNM PAL645B
USNM:PAL
Spirifera (Martinia) planoconvexa (Shumard)
USNM PAL174662 C. Hartt & O. Derby
Brazil, Para
USNM:PAL
Spirifer duodenarius (Hall)
USNM PAL97938B C. Butts
United States, Virginia, Washington County
USNM:PAL
Spirifer macconathii Nettelroth
USNM PAL51200
USNM:PAL
Spirifer (Trigonotreta) argentarius Meek
USNM PAL124512