stegocephalian
stegocephalid
amphiaspid
talitroidean
dissorophoid
trematosauroid
adelogyrinid
labyrinthodont
aistopod
pardaliscid
pontoporeiid
ambulacrarian
nectridean
estemmenosuchid
amphisteginid
Morinoia
eryopid
liljeborgiid
beardog
ampullariid
archaeocyathid
recumbirostran
diphyid
forskaliid
palpigrade
stenopterygius
Stenopterygius quadrisicissus
palaeoscolecid
genus Amphisbaenia
igorinid
Amphisbaenia
phronimid
genus Amphisbaena
capitosauroid
Amphisbaena
talitrid
capitosaur
leaf frog
phreatogammarid
pontogeneiid
amphipsocid
capitosaurid
archaeocyath
stenopterygiid
genus Chaetodipterus
amphibian genus
eusirid
Chaetodipterus
stenopsocid
tadpole