PSL280H1 Lecture Notes - Lecture 1: Castoridae, Rodent, Dugongidae
18 Sep 2018
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Based on morphology, there should be 10 dolphin species . However, climate change has been and is rapidly occurring over the past 100 . 200 years l: the marine mammal species we"ll be studying in this course, harbor seals. Family #1 of 3 families in total: phocidae (true or earless" seals: sea lions. Family #2 of 3 families in total: otariidae (eared seals: walruses. Family #3 of 3 families in total: odobenidae. Sub-order #1 of 2 sub-orders in total: odontoceti toothed whales (teeth + 1 blowhole: humpback whales. Sub-order #2 of 2 sub-orders in total: mysticeti baleen whales (no teeth + 2 blowholes: manatees (3 species) Family #1 of 2 families in total: trichechidae: dugong (1 species) Family #2 of 2 families in total: dugongidae: sea/marine otter. 3: class mammalia = all species classified as mammals, have the following similar characteristics: Body covered with hair which molts (sheds hair) 4 limbs (may be visually absent in some!)
