Holopea
ampla
Ulrich & Scofield, 1897 †
(FOSSIL)

Holopea
ampullacea
d''Eichwald, 1860 †
(FOSSIL)

Holopea
antiquata
J. Perner, 1903 †
(FOSSIL)

Holopea
applanata
Lindström, 1884 †
(FOSSIL)

Holopea
appressa
Ulrich & Scofield, 1897 †
(FOSSIL)

Holopea
arctica
Schuchert, 1900 †
(FOSSIL)

Holopea
balticus
E.F.R.K. Koken & J. Perner, 1925 †
(FOSSIL)

Holopea
brucei
Rohr, 1980 †
(FOSSIL)

Holopea
concinnula
Ulrich & Scofield, 1897 †
(FOSSIL)

Holopea
coronata
E.F.R.K. Koken & J. Perner, 1925 †
(FOSSIL)

Holopea
corrugata
Twenhofel, 1928 †
(FOSSIL)

Holopea
eichwaldi
E.F.R.K. Koken, 1897 †
(FOSSIL)

Holopea
elizabethi
Rohr, 1980 †
(FOSSIL)

Holopea
enjalrani
A.H. Clarke, 1907 †
(FOSSIL)

Holopea
enjalrani
A.H. Clarke, 1907 †
(FOSSIL)

Holopea
excelsa
Ulrich & Scofield, 1897 †
(FOSSIL)

Holopea
expandens
J. Perner, 1907 †
(FOSSIL)

Holopea
filosus
E.F.R.K. Koken & J. Perner, 1925 †
(FOSSIL)

Holopea
gaspesia
A.H. Clarke, 1908 †
(FOSSIL)

Holopea
gigantea
R.N. Nelson, 1963 †
(FOSSIL)

Holopea
glindmeyeri
Rohr, 1980 †
(FOSSIL)

Holopea
gracia
Billings, 1865 †
(FOSSIL)

Holopea
guelphensis
Billings, 1865 †
(FOSSIL)

Holopea
harpa
Angelin & Lindström, 1880 †
(FOSSIL)

Holopea
hubbardi
Miller, 1892 †
(FOSSIL)

Holopea
inaequistriata
E.F.R.K. Koken & J. Perner, 1925 †
(FOSSIL)

Holopea
incola
J. Perner, 1903 †
(FOSSIL)

Holopea
inflata
Yü, 1961 †
(FOSSIL)

Holopea
informis
Wilson, 1932 †
(FOSSIL)

Holopea
insignis
Ulrich & Scofield, 1897 †
(FOSSIL)

Holopea
iowaensis
W.H. Webster, 1906 †
(FOSSIL)

Holopea
latens
Öpik, 1953 †
(FOSSIL)

Holopea
lavinia
Billings, 1865 †
(FOSSIL)

Holopea
lavinia
Billings, 1865 †
(FOSSIL)

Holopea
marylandica
A.H. Clarke & Swartz, 1913 †
(FOSSIL)

Holopea
media
Wilson, 1951 †
(FOSSIL)

Holopea
mediocris
Billings, 1866 †
(FOSSIL)

Holopea
missouriensis
Bradley, 1930 †
(FOSSIL)

Holopea
mobergi
Troedsson, 1918 †
(FOSSIL)

Holopea
nicolettensis
Foerste, 1924 †
(FOSSIL)

Holopea
nitidissima
Lindström, 1884 †
(FOSSIL)

Holopea
obliqua
J.W. Hall, 1847 †
(FOSSIL)

Holopea
obsoleta
J.W. Hall, 1852 †
(FOSSIL)

Holopea
occidentalis
Nicholson, 1872 †
(FOSSIL)

Holopea
ophelia
Billings, 1865 †
(FOSSIL)

Holopea
ottawaensis
Wilson, 1951 †
(FOSSIL)

Holopea
ovalis
Billings, 1859 †
(FOSSIL)

Holopea
paludiniformis
J.W. Hall, 1847 †
(FOSSIL)

Holopea
parvula
Ulrich & Scofield, 1897 †
(FOSSIL)

Holopea
perforata
Lindström, 1884 †
(FOSSIL)

Holopea
plauta
W.J. Raymond, 1906 †
(FOSSIL)

Holopea
praecursor
E.F.R.K. Koken & J. Perner, 1925 †
(FOSSIL)

Holopea
pumila
Zhu, 1995 †
(FOSSIL)

Holopea
pyrene
Billings, 1865 †
(FOSSIL)

Holopea
rossbrookiensis
Peel, 1977 †
(FOSSIL)

Holopea
rotunda
Ulrich & Scofield, 1897 †
(FOSSIL)

Holopea
scalariforme
Lindström, 1884 †
(FOSSIL)

Holopea
scrutator
W.J. Raymond, 1905 †
(FOSSIL)

Holopea
similis
Ulrich & Scofield, 1897 †
(FOSSIL)

Holopea
simmonensis
Tolmachoff, 1930 †
(FOSSIL)

Holopea
simplex
E.F.R.K. Koken & J. Perner, 1925 †
(FOSSIL)

Holopea
subconica
Winchell, 1863 †
(FOSSIL)

Holopea
subtilis
Ulrich & Scofield, 1897 †
(FOSSIL)

Holopea
supraplana
Ulrich & Scofield, 1897 †
(FOSSIL)

Holopea
symmetrica
J.W. Hall, 1847 †
(FOSSIL)

Holopea
transversa
Lindström, 1884 †
(FOSSIL)

Holopea
undulata
Wilson, 1932 †
(FOSSIL)

Holopea
vaurealensis
Twenhofel, 1928 †
(FOSSIL)

Holopea
vigneauensis
Twenhofel, 1938 †
(FOSSIL)

Holopea
macrostomus
J.W. Hall, 1861 †
(FOSSIL)

Holopea
craigi
Rohr & al. 2008 †
(FOSSIL)

Holopea
henningsmoeni
E.L. Yochelson 1963 †
(FOSSIL)

Holopea
nereis
Billings, 1865 †
(FOSSIL)

Holopea
sibeliuxeni
Peel 1975 †
(FOSSIL)

Holopea
vermiculosa
(J. Perner, 1903 †)
(FOSSIL)

Holopea
disjuncta
J. Perner 1903 †
(FOSSIL)

Holopea
variabilis
E.F.R.K. Koken, 1897 †
(FOSSIL)

Holopea
sweeti
R.P. Whitfield, 1882 †
(FOSSIL)

Holopea
hudsoni
W.J. Raymond, 1905 †
(FOSSIL)

Holopea
nitida
E.F.R.K. Koken & J. Perner, 1925 †
(FOSSIL)

Holopea
turgida
J.W. Hall, 1847 †
(FOSSIL)

Holopea
peoriensis
A.H. Worthen, 1884 †
(FOSSIL)

Holopea
nux
Lindström, 1884 †
(FOSSIL)

Holopea
proutana
J.W. Hall, 1856 †
(FOSSIL)

Holopea
harmonia
Billings, 1865 †
(FOSSIL)

Holopea
kettneri
Frýda & K. Bandel, 1997 †
(FOSSIL)

Holopea
cassina
R.P. Whitfield, 1886 †
(FOSSIL)

Holopea
fountainensis
Weller, 1916 †
(FOSSIL)

Holopea
newtonensis
R.P. Whitfield, 1882 †
(FOSSIL)

Holopea
hebe
J.W. Hall, 1859 †
(FOSSIL)

Holopea
eruca
J. Perner, 1907 †
(FOSSIL)

Holopea
ruchholzi
Gischler & al., 2004 †
(FOSSIL)

Holopea
lepidula
J. Perner, 1903 †
(FOSSIL)

Holopea
servus
J. Perner, 1903 †
(FOSSIL)

Holopea
textilis
Miller, 1897 †
(FOSSIL)

Holopea
vulgaris
J. Perner, 1907 †
(FOSSIL)

Holopea
planidorsata
Dunbar, 1920 †
(FOSSIL)

Holopea
mima
J. Perner, 1903 †
(FOSSIL)

Holopea
interupta
J. Perner, 1903 †
(FOSSIL)

Holopea
praestans
J. Perner, 1903 †
(FOSSIL)

Holopea
proctoni
Tassell, 1982 †
(FOSSIL)

Holopea
teres
Pan & Erwin, 2002 †
(FOSSIL)

Holopea
bacca
Pan & Erwin, 2002 †
(FOSSIL)

Nematotrochus
anceps
E.F.R.K. Koken & J. Perner, 1925 †
(FOSSIL)

Nematotrochus
bicarinatus
E.F.R.K. Koken & J. Perner, 1925 †
(FOSSIL)

Nematotrochus
bicarinatus
Wahlenberg, 1821 †
(FOSSIL)

Pachystrophia
contigua
(Ulrich & Scofield, 1897 †)
(FOSSIL)

Pachystrophia
devexa
(K.E.I. von Eichwald, 1859 †)
(FOSSIL)

Pachystrophia
dilatata
J. Perner, 1903 †
(FOSSIL)

Pachystrophia
gotlandica
(Lindström, 1884 †)
(FOSSIL)

Pachystrophia
helicoides
(E.F.R.K. Koken, 1896 †)
(FOSSIL)

Pachystrophia
inchoans
(J. Perner, 1903 †)
(FOSSIL)

Pachystrophia
inornatum
(J.J.F. Whiteaves, 1884 †)
(FOSSIL)

Pachystrophia
lescarboti
(A.H. Clarke, 1908 †)
(FOSSIL)

Pachystrophia
mullockensis
Longst, 1924 †
(FOSSIL)

Pachystrophia
orinini
(Wenjukov, 1899 †)
(FOSSIL)

Pachystrophia
subuloidea
J. Perner, 1903 †
(FOSSIL)

Pachystrophia
triquestra
(Lindström, 1884 †)
(FOSSIL)

Pachystrophia
tuba
(Lindström, 1884 †)
(FOSSIL)

Pachystrophia
vortex
(d'Eichwald, 1856 †)
(FOSSIL)

Pachystrophia
spiralis
Rohr, 1988 †
(FOSSIL)

Raphistomina
aperta
(Salter, 1859 †)
(FOSSIL)

Raphistomina
aperta
Wilson, 1951 †
(FOSSIL)

Raphistomina
barbouri
(A.W. Grabau, 1922 †)
(FOSSIL)

Raphistomina
denticulata
Ulrich & Scofield, 1897 †
(FOSSIL)

Raphistomina
distincta
Wilson, 1921 †
(FOSSIL)

Raphistomina
fissurata
Steele & Sinclair, 1971 †
(FOSSIL)

Raphistomina
hortensia
(Billings, 1865 †)
(FOSSIL)

Raphistomina
lapicida
(Salter, 1859 †)
(FOSSIL)

Raphistomina
lenticulare
(E. Emmons, 1842 †)
(FOSSIL)

Raphistomina
modesta
Ulrich & Scofield, 1897 †
(FOSSIL)

Raphistomina
pillagenensis
Twenhofel, 1938 †
(FOSSIL)

Raphistomina
rugata
Ulrich & Scofield, 1897 †
(FOSSIL)

Raphistomina
tasmanica
(Johnston, 1888 †)
(FOSSIL)

Raphistomina
undulata
W.J. Raymond, 1906 †
(FOSSIL)

Raphistomina
latiumbilicata
C.M. Poulsen, 1927 †
(FOSSIL)

Raphistomina
laurentina
Billings, 1859 †
(FOSSIL)

Raphistomina
sinclairensis
Kobayashi, 1955 †
(FOSSIL)

Raphistomina
richmondensis
Ulrich & Scofield, 1897 †
(FOSSIL)

Raphistomina
affinis
Foerste, 1887 †
(FOSSIL)

Threavia
nuda
Horný, 1992 †
(FOSSIL)