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