macrofossils Flashcards
oldest craniates
body is covered w/ bony dermal armor
pairs of side flaps
ostracodermi
primitive vertebrates
bottom dwellers
no backbone
scavengers
myxini
filter feeders
large, rounded mouth and by single nostril
cephalaspidomorphi
no scales eel-like jawless no backbone unpaired fins
agnatha
jawed
paired nostril
paired fins and limbs
gnasthosmata
oldest non-armored jawed fish, distinguished by bony spines projecting infront of their fins
acanthodians
plate-skinned fishes
placoderms
cartilaginous fishes
chondrichthyes
fishes with bony skeletons, play a major role in the veolution of tetrapods
ostiechthyes
diamond-shaped scales
arheoteryginians
lobe fin - direct ancestors of amphibians
sarcopterygians
fish-like amphibians
limbs likely used ofr paddling
achantostega
amphibians with lungs
limbs used for navigating
tail for balance
skeletal structure
icthyostega
small giant tetrapods, abundant in carboniferous
temnospondylous ampphibians
small lizard
microsauria
elongate body
diminutive limbs
fenestrated skulls
lysorophia
earliest known proto-reptile
westlothiana
earliest know bird (160 mya jurassic)
aurornis xui
toothed bird
hesperonithiformes
toothed birds and divers
grebes, penguins, pelicans
water birds
charadriformes
mammals that give birth the young
eutheria
hoofed mammals
artiodactyla
mea-eating mammals
carnivora
carnivorous and finned
cetacea
egg laying mammals
prototheria
most primitive mammals, lays eggs
monotremata
