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As marsupials, female opossums have a reproductive system that includes a bifurcated vagina and a divided uterus; many have a pouch. [29] The average estrous cycle of the Virginia opossum is about 28 days. [30] Opossums do possess a placenta, [31] but it is short-lived, simple in structure, and, unlike that of placental mammals, not fully ...
The Sulawesi bear cuscus, also known as the Sulawesi bear phalanger (Ailurops ursinus), is a species of arboreal marsupial in the family Phalangeridae that is endemic to Sulawesi and nearby islands in Indonesia. It lives in tropical moist lowland forest at elevations up to 600 m (2,000 ft) and is diurnal, folivorous and often found in pairs. [2]
Peramelemorphia includes the bandicoots and bilbies: it equates approximately to the mainstream of marsupial omnivores. All members of the order are endemic to the twin land masses of Australia - New Guinea and most have the characteristic bandicoot shape: a plump, arch-backed body with a long, delicately tapering snout, very large upright ears ...
instead of a cloaca [a] like monotremes, marsupials and most other vertebrates, the conduits of the urogenital system exit through the vulva or penis and the rectum opens as the anus. [7] The main internal organs and conduits of the placental urogenital system consist of one or two uteri , a single vagina , and a urethra for females, and a ...
The cleavage stages of marsupial development are very variable between groups and aspects of marsupial early development are not yet fully understood. An infant marsupial is known as a joey . Marsupials have a very short gestation period—usually between 12.5 and 33 days, [ 41 ] but as low as 10.7 days in the case of the stripe-faced dunnart ...
A marsupial has a short gestation period, typically shorter than its estrous cycle, and gives birth to an underdeveloped newborn that then undergoes further development; in many species, this takes place within a pouch-like sac, the marsupium, located in the front of the mother's abdomen.
All extant marsupials are endemic to Australasia and the Americas. A distinctive characteristic common to most of these species is that the young are carried in a pouch . Well-known marsupials include kangaroos , wallabies , koalas , opossums , wombats , Tasmanian devils , and the extinct thylacine .
The pouch is a distinguishing feature of female marsupials, monotremes [1] [2] [3] (and rarely in the males as in the yapok [4] and the extinct thylacine); the name marsupial is derived from the Latin marsupium, meaning "pouch". This is due to the occurrence of epipubic bones, a pair of bones projecting forward from the pelvis.