Chapter 10 - Overview Of The Fossil Primates Flashcards
Pentadactyly
Five fingers and toes
Orthograde
Upright body position
Strepsirhine
Lemurs and lorises
Haplorhine
Tarsiers, monkeys, apes, and humans
Euarchonta
Tree shrews, flyin lemurs, and primates
Superorder
Above order, below class and subclass
Sister groups
Two new clades
Last common ancestor (lca)
Final evolutionary link between two related groups
Stem group
All taxa in a clade before a major speciation event
Semiorder
Above suborder and below order
Euprimates
True primates
Postcranial
Below the skull
Adapoidea
Lemur-like
Omomyoidea
Tarsier and galago - like
Homology
Similar traits based on descent
Homoplasy
Similar traits that evolve independently in different groups
Lorisoids
Earliest example of strepsirhine primates in fossil record
Subfossil
Bone not old enough to have become completely mineralized fossil
Bilophodont
Referring to molars that have four cusps oriented in two parallel rows, resembling ridges or lophs
Paleoprimatologists
Anthropologists specializing in the study of the nonhuman primate fossil records
Omomyoids
Earliest haplorhine group
Catarrhine
Old world monkeys, apes, and humans
Plattyrhines
New world monkeys
Y-5 molar
Molar with 5 cusps