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24 Cards in this Set

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Vomernasal Organ

Pheromone Reception


Primitive


AKA Jacobson's Organ

Nose of Platyrrhine

Cebus


Ateles


NWM


Nostrils Face Sideways/outwards


Flat Nose

Nose of Catarrhine

Cercopithecus


Macaque


Papio


Nostrils face downside


Hook nosed



Rhinarium

Moist naked surface around nostrils of the nose


Appears in most mammals, most prosimians - NOT Tarsiers

Philtrum

Medial Cleft


Vestigial medial depression between nose and lip

Strepsirrhini Nose

Curly-nosed primates with rhinaria


Older - More Ancestral Condition

Haplorhini Nose

Simple-nosed primates which have replaced the rhinarium with a more mobile, continuous, dry upper lip

Olfaction: Bony Construction in Humans

1 Maxillary


2 Ethmodial


Reduced Complexity

Olfaction: Bony Construction in Lemurs

1 Nasal


4 Ethmoidal


1 Maxillary

Rods

Function in less intense light

Stereoscopic Vision

Overlapping vision

Scotopic Vision

Low Light


Monochromatic


Seen Tarsiers & Aotus

Photopic Vision

Diurnal


Color Vision


Seen in:


MOST NWM


OWM


Apes


Humans

Vision Mammal Evolutionary Traits

Eyelashes


Rods predominate


Visual Cortex

Vision Primate Evolutionary Traits

Eyes frontally direct


Macula & Fovea




Elaboration of Visual Cortex

Macula Lutea

Oval-shaped pigmented area near the center of the retina of the human eye


Specialized for high-acuity vision

Forvea Centralis

Small, central pit composed of closely packed cones in the eye


Response for sharp central vision

Tympanic Ring - Os ectotympanium

Derived from membranous bone

Tympanic Bulla

Houses sensory receptors of the ear.

Platysma

Muscle in neck, cause neck to protrude out

Primitive Mammal Auditory Functions

No ossified floor of the petrou portion of the temporal bone

Primitive Primates

Floor is ossified derived from Cartilage - Tympanic Bulla


Most mammals & Lemurs

What Primates have a tympanic ring & membrane exposed?

Lorises & NWM

What primates have tympanic ring expanded laterally to form the tympanic canal?

OWM, Hominins, & Tarsiers