© 1999 ENSI (Evolution & the Nature of Science Institutes) www.indiana.edu/~ensiweb
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CLASSROOM CLADOGRAM OF
VERTEBRATE/HUMAN EVOLUTION

TEAM ASSIGNMENT STRIPS
One group assigned per team.
Make 2-4 copies of these 2 sheets for each class, and cut them into strips
so each person on a team gets a copy of the team assignment.

  NAME OF GROUP 1
Cephalochordates:
Extinct (earliest):
Pikaia sp.?
Today:
Amphioxus: Branchiostoma sp.
 FIRST APPEARED
530 mya
 

  NAME OF GROUP 2
Agnatha (jawless fishes)
Extinct (earliest):
Heterostracans (e.g. Pteraspis)
Today: Cyclostomes:
lampreys and hagfishes

FIRST APPEARED
500 mya
 

  NAME OF GROUP 3
Gnathostomes (jawed fishes)
Extinct (earliest):
Acanthodians: Climatius
Paleoniscoids: Cheirolepis
Today (typical):
salmon, perch, trout, goldfish

FIRST APPEARED
430 mya
 

  NAME OF GROUP 4
Crossopterygians (lobe-finned fishes)
Extinct (earliest):
Osteolepis
Eusthenopteron
Today:
Coelacanth (Latimeria)

FIRST APPEARED
400 mya
 

  NAME OF GROUP 5
Amphibians
Extinct (earliest):
Acanthostega
Ichthyostega

Anthracosaurs (e.g. Seymouria)
Today (typical):
salamanders, frogs

FIRST APPEARED
360 mya
 

  NAME OF GROUP 6
Reptiles
Extinct (earliest: cotylosaurs):
Hylonomus
Paleothyris
Today (typical):
lizards, crocodiles, tortoises, birds

FIRST APPEARED
300 mya
 

  NAME OF GROUP 7
Mammal-like Reptiles (Synapsids):
Extinct:
Therapsids (e.g. Cynognathus)
Pelycosaurs (e.g. Dimetrodon)

FIRST APPEARED
250 mya
 

  NAME OF GROUP 8
Mammals:
Extinct (earliest):
Sinoconodon
Kuehneotherium
Today (typical):
cats, dogs, bears, cows, horses, etc.

FIRST APPEARED
200 mya
 

  NAME OF GROUP 9
Primates:
Extinct (earliest):
Plesiadapids (e.g. Palaechthon)
Cantius
Today (typical Prosimians):
tree shrews, lemurs

FIRST APPEARED
65 mya
 

  NAME OF GROUP 10
Hominoids ("Pre-Apes"):
Extinct:
Aegyptopithecus
Proconsul
Today (Apes):
chimpanzees, gorillas, orangutans

FIRST APPEARED
30 mya
 

  NAME OF GROUP 11
Hominins (Humans, formerly "Hominids"):
Extinct:
Australopithecus spp.
Homo habilis, H. erectus, et al
Today: Homo sapiens

FIRST APPEARED
4 mya
 

 

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