EEB388H1 Final: EEB388 FINAL EXAM NOTES PART II
14 Dec 2015
School
Department
Course
Professor
Document Summary
Monotremata ( single hole cloaca) order. Share many features with reptiles: sprawled posture of forelimbs, lay eggs, mammary gland lack. Penis is bifurcate at the tip just for semen. F: 10x chrome, m: 5x 5y; theria is f: 2x, m xy. Prototheria (egg- laying) subclass nipples/teats, cloaca. Duckbilled platypus is in eastern australia and is semiaquatic and semifossorial. Eats aquatic invertebrates by finding them with their electroreceptors in the beak, rostrum is covered in skin. 1- 3 eggs are laid and feed on thick milk secreted from glands. Echidnas are in two genera (short and long nosed) found in australia and new guniea. A temporary pouch develops on the abdomen of breeding females. A single egg is laid into the pouch and feeds on milk secretions. Distinguishing characteristics: premaxillae/maxillae do not meet at tip of rostrum, no teeth, lack coronoid process, have beak", elongated rostrum. Species didelphis virginiana virginia opossum.
