Date: Monday, Dec. 16, 8 – 10 am
Total Points: 150
Breakdown:
Lectures 19 – 26 (100 points)
“Big Picture” (50 points)
Draw a phylogenetic tree illustrating relationships among:
Testudines
Chondrichthyes
Lissamphibia
Lampreys
Cephalochordates
Mammalia
Hagfishes
Actinopterygii
Aves
Squamata
Sarcopterygii
Crocodylia
Key Steps:
Construct tree based on widely accepted evolutionary relationships from BIOL 324.
Map synapomorphies defining key branches:
Temporal fenestrae
Vertebrae
Endothermy
Notochord
Jaws
Amniotic egg
Paired fins/limbs
Pharyngeal slits
Clades Involved: Crocodylia + Dinosauria (includes modern birds)
Eggs with hard calcium carbonate shell
Nests built from vegetation
Some degree of parental care
Antorbital and mandibular fenestrae
Note: Secondary loss in crocodilians
Alligatoridae:
Habitat: Freshwater to
Bio 325 Lecture+26+Fall+2024