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Mammalogy

Subclass Theria Infraclass Metatheria

QuestionAnswer
Location of Metatheria Neotropics, South America, Australia
Traits of Metatheria Simple placenta; Two vaginae; No cloaca; Angular mandible; Half to permanent pouch; Vipricious; Teeth; Altricial young; Scrotum before penis; Low metabolic rate; Narrow ecological range; No baculum
Dentition of Metatheria Polyprotodont have multiple lower incisors; Diprotodont two lower incisors straight out
Digits of Metatheria Nonsyndactylous with no fusion; Syndactylous with 2nd and 3rd digits fused in sheath
Historical Zoogeography of Metatheria North America first, to Europe, and independent in Australia and Antarctica
Order Didelphimorphia New world opossums; 87 spp; South America; Polyprotodont and Didactylous; Primitive dental; Absent-well developed pouch; Pentadactyl; Hairless prehensile tail; Narrow brain case
Order: Didelphimorphia Family: Caenolestidae Shrew and Rat Opossums; Small diversity; Western South America, dense forests at high elevation; Diprotodont and didactylous; Insectivores
Order: Microbiotheria Family: Microbiotheriidae Monito del Monte/Colocolos; High Andes in Chile; Polyprotodont and didactylous; Invertebrate feeding; Arboreal; Fat storage in tail for hibernating that can double mass; Seen as bad luck
Order: Dasyuromorphia Family: Myrmecobiidae Numbat; Australia; Myrmecophagous up to 10,000-20,000 a day; Polyprotodont and didactylus; Tongues are 10 cm out of mouth; Supernumerary (52), the largest number; Endangered for habitat loss and predation by introduction of red foxes
Order: Dasyuromorphia Family: Dasyuridae Tasmanian devil-marsupial mouses; Australia; Five toes on manus and 4-5 on pes; Insectivores and carnivores; Poorly developed marsupiums; Carnassial teeth; Tasmanian is largest extant carnivorous marsupial, is endangered because of contagious face cancer
Order: Diprotodonta Kangaroos, wombats; Huge diversity; Australia; Diprotodonta and syndactylous; Schizodactylous feet in arboreal species with 1st two toes opposing last 3, large toe on back feet; Herbivores mostly; Complete with livestock, are hunted.
Order: Notoryctemorphia Family: Notoryctidae Marsupial moles; very small diversity; Only complete fossorial marsupials; No eyes or ears; Fusiform bodies; Moth and beetle eggs and larvae; Well developed marsupium; Swim through soil; Nasal guard
Order: Peramelemorphia Family: Peramelidae Bandicoot; Australia and New Guinea; Chorioallentoic placenta with no villi; highest reproduction rates in marsupials; Omnivores
Order: Peramelemorphia Family: Thylacomyidae Bilibies; Australia and New Guinea; Highest reproduction rates in marsupials; Omnivores
Created by: LionsandGiants