Primate taxonomy

Primate taxonomy

Multiple Choice

A derived trait for primates is _____________.

• fused frontal suture

• opposable thumb

• loss of the rhinarium

• excellent sense of smell

Multiple Choice

The haplorrhine clade is defined by _____. ("defined by" is a good way to think about the concept "derived")

• a wet nose (rhinarium)

• a claw on one toe

• 2.1.2.3. dental formula

• loss of a tapetum lucidum (a.k.a. reflective tapetum)

Multiple Choice

The fact that tarsiers are nocturnal and lemurs and lorises are nocturnal _____

• shows us that these primates should be grouped together under prosimians.

• is not useful because it is ancestral

• is not useful because it is an analogous trait

• tarsiers don't really exist

Multiple Choice

Tarsiers share the trait of unfused frontal suture with lemurs and lorises but that trait is not useful because it is _____.

• a homologous trait

• an analogous trait

• a derived trait

• an ancestral trait

Multiple Choice

If tarsiers are truly supposed to be grouped with lemurs and lorises (under prosimians), what would have to be true?

• Tarsiers would have had to have evolved all nails independent of anthropoids

• Tarsiers would have had to have lost the reflective tapetum independent of anthropoids

• Tarsiers would have had to have lost the rhinarium independent of anthropoids

• Tarsiers would have had to have gained post orbital closure independent of anthropoids

• all of these

Multiple Choice

A trait that helps to group together just anthropoids is _______.

• loss of the rhinarium

• all nails

• fused mandible

• 2.1.2.3. dental formula

Multiple Choice

A derived trait for platyrrhines is ________.

• prehensile tail for grasping

• 2.1.3.3. dental formula

• 2.1.3.2. dental formula

• flat nose

Multiple Choice

Cebids have a 2.1.3.3. dental formula ______.

• which is a good derived trait for the group

• which is a useless trait because it already exists above Cebid on the chart

• but they lose a molar as they age

• helps to define cebids as a group

Multiple Choice

Which one of these is a strepsirrhine?

Multiple Choice

Which of the following traits is useful for grouping catarrhines together as a clade?

• 2.1.2.3 dental formula

• fused frontal sutures

• the loss of tail

• Y-5 molars

Multiple Choice

Which trait shows you that the species is an ape?

• 2.1.2.3. dental formula (which you also have)

• fused frontal suture

• loss of visible tail

• opposable thumbs

Multiple Choice

What group is that primate from?

• cercopithecoid

• catarrhine

• callitrichid

• cebid

Multiple Choice

Which of the following is NOT an ape (i.e. hominoid)