Lab 8: Amniotes – Fill-in-the-Blank Flashcards

30 fill-in-the-blank flashcards covering key concepts, taxonomy, skull types, dentition, and distinctive traits from Lab 8: Amniotes.

The clade that includes mammals, reptiles, and birds is called __.

Amniota

The egg adapted for fully terrestrial life in this clade is the __ egg.

amniotic

The opening behind the eye socket for jaw muscles is the __.

temporal fenestra

A skull with ONE temporal fenestra is termed a __ skull.

synapsid

Mammals possess the __ type of skull.

synapsid

A skull with TWO temporal fenestrae is called a __ skull.

diapsid

Birds and most modern reptiles have __ skulls.

diapsid

Turtles exhibit an __ skull with NO temporal fenestra.

anapsid

Having all teeth of the same shape is called __ dentition.

homodont

Most mammals have differing tooth shapes, known as __ dentition.

heterodont

Mammals that replace their teeth only once are described as __.

diphyodont

Hair, sebaceous glands, and endothermy are general traits of class __.

Mammalia

Egg-laying mammals are grouped in subclass __.

Prototheria

Echidnas and the platypus are members of the order __.

Monotremata

Marsupials belong to infraclass __ within subclass Theria.

Metatheria

Placental mammals are classified in infraclass __.

Eutheria

Roughly 40 % of eutherian species are in the order __.

Rodentia

Modern reptiles typically excrete nitrogenous waste as __.

uric acid

The only living species in order Sphenodonta is __.

Sphenodon punctatus

Snakes, lizards, and amphisbaenians belong to order __.

Squamata

Turtles are placed in order __ (also called Testudines).

Chelonia

The dorsal portion of a turtle’s shell is the __.

carapace

Crocodiles, alligators, and gharials are members of order __.

Crocodilia

The superorder that includes crocodiles, dinosaurs, and birds is __.

Archosauria

Birds possess a large sternum projection called the __ for attachment of flight muscles.

keel

Fused sacral vertebrae in birds form the __.

synsacrum

Dinosaurs with a “bird-hipped” pelvis belong to order __.

Ornithischia

Birds are nested within the dinosaur order __.

Saurischia

Tuataras have a light-sensitive organ on the head called the __ eye.

parapineal

Mammals that give birth to underdeveloped young that continue development in a pouch are __.

marsupials