Marine Mammals

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Synapsid skulls:

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Therapsids are early ancestors of mammals

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Mammal fossils are identified by...

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Extant mammal traits include:

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Features of early Mammaliaformes include...

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❌: ❌ (extinct) -- small rodent-like omnivores with broad multi-cusped teeth
❌: ❌ -- refers to cloaca with one opening for excretory and reproductive tracts
❌: ❌ -- prolonged lactation, pouch
Eutheria: placentals -- prolonged gestation

Allotheria

Multituberculates

Prototheria

Monotremes

Metatheria

marsupials

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Metatheria includes two sub-groups: the ( Ameridelphia, Australidelphia, Allotheria, Prototheria ), or opossums, and the ( Australidelphia, Ameridelphia, Prototheria, Allotheria ), which include the Tasmanian devil, Tasmanian tiger, bandicoot, and others.

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Prototheria, or monotremes, include which animals?

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The __________ is also known as the age of Mammals

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The ( Mesozoic, Paleozoic, Cretaceous ), or the "true age of mammals," represents ( 2/3, 1/2, 1/3, 1/4 ) of mammalian history. there are about ( 300, 200, 500, 400 ) genera known from this period, although most were some form of ( mouse, dog, lemur, monkey ). Although this has historically been attributed to the fall of dinosaurs, recent evidence suggest that patterns of ( plant, bird, bacterial ) evolution had a greater influence on mammal diversity,

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During which periods were the primary radiations in Mesozoic Mammals?

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The end-Cretaceous extinctions also affected mammals: lost ( marsupials, monotremes, rodents ) and archaic type ( placentals, monotremes, cetaceans ). Mammals quickly recovered, but did not really start to diversify again until the ( Cenozoic, Paleozoic, Proterozoic ).

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5% of all mammals are marine

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Marine mammals in ( Order Carnivora, Order Sirenia and Order Cetariodactyla, Order Amphibia ) are amphibious, while those in ( Order Sirenia and Order Cetariodactyla, Order Carnivora, Order Sirenia and Order Cetacea ) are wholly marine.

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❌ Cetacea and includes the ❌s ❌ (baleen whales) and ❌ (toothed whales)

Infraorder

Order

Suborder

Mysticeti

Odontoceti

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Adaptations to marine habitat include...

Study guide for Marine Mammals in Marine Verts class

Marine Mammals

Synapsid skulls:

Therapsids are early ancestors of mammals

Mammal fossils are identified by...

Extant mammal traits include:

Features of early Mammaliaformes include...

❌: ❌ (extinct) -- small rodent-like omnivores with broad multi-cusped teeth ❌: ❌ -- refers to cloaca with one opening for excretory and reproductive tracts ❌: ❌ -- prolonged lactation, pouch Eutheria: placentals -- prolonged gestation

Prototheria, or monotremes, include which animals?

The __________ is also known as the age of Mammals

During which periods were the primary radiations in Mesozoic Mammals?

5% of all mammals are marine

❌ Cetacea and includes the ❌s ❌ (baleen whales) and ❌ (toothed whales)

Adaptations to marine habitat include...

What is axial swimming?

❌: ❌ (extinct) -- small rodent-like omnivores with broad multi-cusped teeth
❌: ❌ -- refers to cloaca with one opening for excretory and reproductive tracts
❌: ❌ -- prolonged lactation, pouch
Eutheria: placentals -- prolonged gestation