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14 Cards in this Set
- Front
- Back
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Prototheria
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Monotremes
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Ornithorhynchidae
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Platypus
Ornithorhynchus anatinus |
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Tachyglossidae
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Echidna
- Short-beaked echidna, Tachyglossus aculeatus - Long-beaked echidna, Zaglossus bruijni |
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Monotremes are like Mammals...
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Have fur
Suckle their young on milk Endothermic |
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Monotremes are unlike mammals...
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They lay eggs
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To know if a FOSSIL is a mammal
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cand see milk or fur... Mammals defined by having a single dentary bone.
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Platy disbn'
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In eastern Australia and Tasmania
*strange skin disease in tasmania |
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Feeding and diving capabilities
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Swim to surface and eat what they brought up formthe bottom.
Beak- digs around in mud for inverts Electrosensitive organs in bill to find food (cant see underwater) movement of prey's muscles indicates where they are. |
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Body Temperature
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~32 (marsupials are higher ~34-37, eutherians 37-38, birds are ~38-40)
Fairly constant in the day STUDY! Do echidnas hibernate? Do platypus hibernate? Platypus- no, echidna- yes Platypuses have a small body, warm body temp in cold water, and thick fur that keeps their body dry. |
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Reproduction
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Only left ovary works
Cloaca- Only one opening for repro, urine, and feces. Mate- Sept Oct- lay eggs Feb- emerge (in spring, chill in the pouch) Small egg ~1cm |
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Burrows
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Not very deep (02 xchange)
Can be very long Opening is near water |
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Mysteries of platypus
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Males have a poision spurr on thier hind legs
Venom and venom ducts Reproduction?? |
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Long beaked echidna
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Zaglossus bruijni
Dont know if they have an electrosensitive snout (short ones do) Can get to 17Kg * In highland forests of New Guinea (in steep montane areas above 2000m) * Very endangered, due to habitat degredation * Cant live in captivity **toronga zoo tried * slightly warmer temp than short beaked * No torpor in captivity, maybe in wild |
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Short beaked echidna
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* Live everywhere in Australia, wide amt of habitat
* No torpor in captivity either, maybe in wild... * Skeleton similar to reptiles * Resperatory turbinals - define mamals - retain noisture on thier nose as they breathe * Feces - mostly dirt and exoskeleton of animals that they have eaten *Ears - Have huge ears (can hear really well) * Intelegence -T maze (as smart as a rat) * Nose has electroreceptoirs where snout is wet * Reproduciton Whole life cycle is based on reproduction (most waking time is spent mating, gestation, or lactation etc) Torpor They go into daily hibernation (lower body temp to save energy) Hibernation In winter |
