Supriya Ghosh (Editor)

Microbiotheria

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Kingdom  Animalia
Superorder  Australidelphia
Higher classification  Australidelphia
Rank  Order
Infraclass  Marsupialia
Scientific name  Microbiotheria
Phylum  Chordata
Microbiotheria infonaturanatureserveorgmapsgroupsnotlimited
Similar  Shrew opossum, Marsupial, Mammal, Peramelemorphia, Dasyuromorphia

Microbiotheria is an australidelphian marsupial order that encompasses two families, Microbiotheriidae and Woodburnodontidae, and is represented by only one extant species, the monito del monte, and a number of extinct species known from fossils in South America, Western Antarctica, and northeastern Australia.

Microbiotheria Mammalsruscom MicrobiotheriaMicrobiotheridae Dromiciops gliroides

Although once thought to be members of the order Didelphimorphia (the order that contains the Virginia opossum), an accumulation of both anatomical and genetic evidence in recent years has led to the conclusion that microbiotheres are not didelphids at all, but are instead most closely related to the Australasian marsupials; together, the microbiotheres and the Australian orders form the clade Australidelphia which are now thought to have first evolved in the South American region of Gondwana.

Microbiotheria Infraclass Metatheria LAB Biology 4141 with Esselstyn at

Biogeography

Microbiotheria Microbiotheria Gallery

The oldest microbiothere currently recognised is Khasia cordillerensis, based on fossil teeth from Early Palaeocene deposits at Tiupampa, Bolivia. Numerous genera are known from various Palaeogene and Neogene fossil sites in South America. A number of possible microbiotheres, again represented by isolated teeth, have also been recovered from the Middle Eocene La Meseta Formation of Seymour Island, Western Antarctica. Finally, several undescribed microbiotheres have been reported from the Early Eocene Tingamarra Local Fauna in northeastern Australia; if this is indeed the case, then these Australian fossils have important implications for understanding marsupial evolution and biogeography. The distant ancestors of the monito del monte, it is thought, remained in what is now South America while others entered Antarctica and eventually Australia during the time when all three continents were joined as part of Gondwana.

Microbiotheria ADW Microbiotheria INFORMATION
Microbiotheria Origin Diversity and Ecology of Marsupials

References

Microbiotheria Wikipedia


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