an emergent
website design
by
peter jay stein, md, ma
atmosphere
asthenosphere
lithosphere
regolith
biosphere
hydrosphere
This 54 page synopsis of the evolution
of the Earth, the origin and progression of life, and the
emergence of humans as descendants of the hominin lineage, divides the last 4.57 billion years into progressively overlapping, imagistic, time segments, to outline our place in biological existence.
magnetosphere
ionosphere
TWENTY-TWO
Emergent Mammals
adapted from Biology, 10th Edition, 2015, pp 443, 687-690; and youtube: How Reptiles Evolved To Form Humans
PROKARYOTE
EUKARYOTE (DOMAIN)
protist
unikont
opisthokont
choanoflagellate
FIRST ANIMAL
bilateria
deuterostome
CHORDATE
vertebrate - with backbone - FISH
pre-vertebrate - no backbone
jawed
jawless
(agnathan)
ostracoderms
(gnathostome)
acanthodians
placoderms
urochordate - tunicates
cephalochordate - lancelets
TETRAPODS
AMPHIBIANS
AMNIOTES -
REPTILES
amniotic egg
DIAPSIDS
(sauropsida)
2 pairs of skull temporal bone openings
ANAPSIDS
turtles
ichthyosaurs (superorder)
BIRDS (class)
SYNAPSIDS
single pair of skull temporal bone openings
THERAPSIDS
MAMMALS (class)- the road to us
2016
self-replicating RNA
DNA (DRNA)
lipid-protein membrane
macromolecular aggregations
LUCA
(last universal common ancestor)
BACTERIA (DOMAIN)
ARCHAEA (DOMAIN)
PLANTS
FUNGI
cartilagenous fishes
bony fishes
lepidosaurs (superorder)
archosaurs (superorder)
t. rex
crocodilia (order)
temporal bone openings lost
hadrocodium: one of the earliest mammals, with fur, 3 floating ear bones, and distinctive cusps on its teeth.
*375 mya
*195 mya
Archaeopteryx
*155 mya
coelomate (mesoderm-lined body cavity)