Larsen 6 Flashcards
(30 cards)
Bilophodont
Refers to the lower molars, in old world monkeys that have two ridges
Arboreal adaptation and
A suite of physical traits that enable an organism to live in trees.
Brachiators
Organism’s that move by Brachiation, or arm-swinging.
Canine-premolar honing complex
The dental form in which the upper canines are sharpened against the lower third premolars when the jaws are opened and closed.
Dental formula
The numerical description of a species’ teeth, listing the number, in one quadrant of the jaws, of incisors, canines, premolars, and molars.
Derived characteristics
Characteristics present in only one or a few species of a group.
Diastema
A space between two teeth
Dietary plasticity
A diets flexibility in adapting to a given environment
Diurnal
Refers to those organism’s that normally are awake and active during daylight hours.
Haplorhines
The cladistic classification for the primate group that consists of anthropoids and tarsiers
Hominin
Humans and human ancestors in a more recent evolutionary taxonomy; based on genetics.
Loph
An enamel ridge connecting cusps on a tooths surface
Nocturnal
Refers to those organism’s that are awake and active during the night
Olfactory bulb
The portion of the anterior brain that detects odors
Opposable
Refers to primates’ thumb, in that it can touch each of the four fingertips, enabling a grasping ability
Parental investment
The time and energy parents expend for their offsprings benefit.
Phylogeny
The evolutionary relationships of a group of organisms.
Power grip
A fist-like grip on which fingers and thumbs wrap around an object in opposite directions
Preadaptation
An organism’s use of an anatomical feature in a way unrelated to the feature’s original function
Precision grip
A precise grip in which the tips of the fingers and thumbs come together, enabling fine manipulation
Prehensile tail
A tail that acts as a kind of hand for support in trees, common in new world monkeys.
Primitive characteristics
Characteristics present in multiple species of a group
Rhinarium
The naked surface around the nostrils, typically wet in mammals.
Sectorial (premolar)
Refers to a premolar adapted for cutting.
