monopleurid
mollusk family
physid
thornyhead
actinocerid
pholad
clisospirid
prochaetodermatid
spalacothere
polychelid
dreissenid
doswellid
strobilopsid
euomphalid
colobodontid
obaichthyid
doswelliid
psarolepid
spondylid
cerithiopsid
order Belemnoidea
sinuopeid
phoxacephalid
Belemnoidea
phyllodontid
sibyrhynchid
silesaurid
onychodontid
tectibranchiate
drupellid
Stenopterygius quadrisicissus
cimolestid
campaniloid
olivid
seashell
palaeonisciform
cryptoplacid
pholidophorid
nerineid
petalodontiform
stenopterygius
spirorchiid
genus Physa
nelma
stryacocephalid
aplacophoran
stenopodidean
ctenacanthiform
univalve
siphonalean