USNM:PAL
Spirifer kennicotti Meek
USNM PAL5899
USNM:PAL
Spirifer Girty
USNM PAL61982 1904-00-00
China, East Ssi-Chuan
USNM:PAL
Spirifer murchisoni Castelnau
USNM PAL97885 Butts & Edmundson
United States, Virginia, Smyth County
USNM:PAL
Spirifer (Martinia) planoconvexus Shumard
USNM PAL8485A Wheeler Survey 1871-00-00
United States, New Mexico
USNM:PAL
Unispirifer forbesi (Norwood & Pratten)
USNM PAL557960 E. McKee & R. Gutschick
United States, Arizona
USNM:PAL
Spirifer centronatus Winchell
USNM PAL8532 Wheeler Survey 1871-00-00
United States, Nevada
USNM:PAL
Spirifer cameratus Morton
USNM PAL181241 Wheeler Survey 1871-00-00
United States, Utah
USNM:PAL
Spirifer redwallensis Carter et al.
USNM PAL557929 E. McKee & R. Gutschick
United States, Arizona
USNM:PAL
Spirifer shoshonensis Branson & Greger
USNM PAL118808
USNM:PAL
Neospirifer mansuetus Cooper & Grant
USNM PAL154607A
United States, Texas, Brewster County
USNM:PAL
Spirifer compactus Meek
USNM PAL13840A
USNM:PAL
Neospirifer notialis Cooper & Grant
USNM PAL154604A
United States, Texas, Brewster County
USNM:PAL
Neospirifer thescelus Cooper & Grant
USNM PAL154610C
United States, Texas, Brewster County
USNM:PAL
Neospirifer formulosus Cooper & Grant
USNM PAL152908E
United States, Texas, Brewster County
USNM:PAL
Spirifera monticola White
USNM PAL14233
USNM:PAL
Spirifer marcyi delta Williams
USNM PAL59620
USNM:PAL
Anthracospirifer rawlinsensis Gordon
USNM PAL167748
United States, Wyoming, Carbon County
USNM:PAL
Spirifer chappelensis Carter
USNM PAL154827
United States, Texas, McCulloch County
USNM:PAL
Neospirifer venezuelensis (Gerth)
USNM PAL221494 P. Hoover
Venezuela, Merida
USNM:PAL
Spirifer (Delthyris) mesacostalis Hall
USNM PAL177077 Maryland Geological Survey
United States, Maryland, Garrett County
USNM:PAL
Neospirifer groenwalli Dunbar
USNM PAL166321
Canada
USNM:PAL
Neospirifer amphigyus Cooper & Grant
USNM PAL152894W
United States, Texas, Brewster County
USNM:PAL
Anthracospirifer occiduus (Sadlick)
USNM PAL256822
United States, Arizona
USNM:PAL
Neospirifer thescelus Cooper & Grant
USNM PAL152917B
United States, Texas, Brewster County
USNM:PAL
Spirifera striata (Martin)
USNM PAL14223A J. Clayton
United States, Utah
USNM:PAL
Spirifer (Delthyris) mesacostalis Hall
USNM PAL178499 Maryland Geological Survey
United States, Maryland, Allegany County
USNM:PAL
Spirifera centronata Winchell
USNM PAL14224B S. Emmons
United States, Utah
USNM:PAL
Spirifer (Delthyris) vanuxemi Hall
USNM PAL97702A C. Butts
United States, Virginia, Frederick County
USNM:PAL
Neospirifer formulosus Cooper & Grant
USNM PAL152909H
United States, Texas, Brewster County
USNM:PAL
Spirifer gregaria Clapp
USNM PAL51198
USNM:PAL
Spirifer mucronatus tulliensis (Williams)
USNM PAL89780
USNM:PAL
Spirifer mucronatus Conrad
USNM PAL97951B Butts & Lawrence
United States, Virginia, Frederick County
USNM:PAL
Neospirifer thescelus Cooper & Grant
USNM PAL152916Y
United States, Texas, Brewster County
USNM:PAL
Spirifer logani Hall
USNM PAL71604A C. Butts
United States, Alabama