Ad
related to: didelphidae family dental
Search results
Results from the WOW.Com Content Network
The dental formula of an opossum is 5.1.3.4 4.1.3.4. [18] No other mammal in North America has more than 6 upper incisors , but the Virginia opossum has 10. Perhaps surprisingly for such a widespread and successful species, the Virginia opossum has one of the lowest encephalization quotients of any marsupial. [ 19 ]
The order Didelphimorphia consists of one family, Didelphidae, which is divided into the subfamilies Caluromyinae, Glironiinae, Hyladelphinae, and Didelphinae.Caluromyinae contains 4 species in 2 genera, Glironiinae and Hyladelphinae each contain a single species, and Didelphinae contains 87 species in 14 genera, as well as the extinct red-bellied gracile opossum, which was last seen in 1962.
The dental formula is: 5.1.3.4 4.1.3.4 × 2 = 50 teeth. By mammalian standards, this is an unusually full jaw. The incisors are very small, the canines large, and the molars are tricuspid. Didelphimorphs have a plantigrade stance (feet flat on the ground) and the hind feet have an opposable digit with no claw.
The Didelphinae are a subfamily of opossums consisting of 15 genera and 123 species. [2] [3] [4] Specimens have been collected throughout the Americas, but are predominant in South and Central America. [5] Some sources call this subfamily the "American opossums", [2] [6] while others use that term for the whole family of opossums, Didelphidae. [1]
Marmosops is a genus of Neotropical opossums of the family Didelphidae. The genus was originally treated as a subgenus from the genus Marmosa rather than having their own classification. This was changed in 1989 by Gardner and Crieghton, who officially separated the group and made them their own genus.
Didelphis is a genus of New World marsupials.The six species in the genus Didelphis, commonly known as Large American opossums, are members of the opossum order, Didelphimorphia.
The dental formula is 5.1.3.4 4.1.3.4 – typical of didelphids. The brown-eared opossum differs from the bare-tailed woolly opossum in having a bushier tail (in the bare-tailed opossum, the tail turns bare abruptly after the first one-third of the length) and a pouch that opens to the front rather than along the midline.
Short-tailed opossums have been found to use nuzzling in chemosensory and exploratory behavior for recognizing individuals of the same species. In Monodelphis domestica, nuzzling and snout-rubbing transforms odor from dry components like glandular secretions, feces, and urine, into moist naso-oral secretions that reach the vomeronasal organ to be processed chemically.
Ad
related to: didelphidae family dental