Instructions unclear, dick stuck in opossum. Females have internal bifurcated reproductive tracts.

Incisors and canines as well as most cheek teeth begin to erupt and then are reabsorbed and replaced by adult teeth.

Seasonal changes in the reproductive anatomy of male Antechinus stuartii (Marsupialia: Dasyuridae), Journal of Morphology, 231, 3, (261-275), (1999). She is in estrus a short period, about 36 hours.

Male Virginia opossums may grow to 100 cm (40 inches) but average about 76 cm (30 inches) in total length (including the tail); females average about 72 cm (28 inches). Wiley Online Library .

The reproductive system of the male opossum, Didelphis virginiana Kerr and its experimental modification † Elizabeth Brown Chase Department of Zoology, The University of Chicago, Illinois Author information: (1)Morphology Laboratory of Veterinary Medicine College, UNIFEOB, São João da Boa Vista, Brazil. This page is dedicated to the anatomy and misc medical issues of the Virginia Opossum. One look at that long, naked appendage and people instantly think “rat,” an association not to the opossum’s advantage. Anatomy/physiology. Turn the possum over on its back and look at the genital area. This trait is true of all marsupials. Yet the tail itself is much to the opossum’s advantage, serving as a veritable fifth limb. This, combined with the female opossum's prenatal habit of licking her belly, nipples and pouch area, led to the folktale that in reproducing, the male and female have sex through the female's nose and she then blows the young into her pouch. Basic Anatomy: The purpose of these pages is to show miscellaneous pictures of opossum anatomy as well as some their medical issues. 20. The rectus muscles originate very close one to another between the orbital surfaces of the presphenoid and palatine bones. The male makes clicking sounds with his mouth to attract the female during mating season. This is the time mating can occur. Anatomy. The penis of the male opossum is bifurcated or forked. Eight extraocular muscles were identified: 4 rectus muscles, 2 oblique muscles, the levator palpebrae superioris and the retractor ocular bulbi.
Sir, Had your Account of the Female Opossum been less Accurate, I should not have been tempted to look farther than the Parts that distinguish the Sexes; for on comparing your Description of the Organs common to both, it was sufficiently evident how little can be added, tho you had but one Subject to …
Sperm, which has become paired in the male opossum’s reproductive tract, will move through the lateral vaginal canals and become separate again in the female’s tract. Edit: actually you're in the clear for possum sex if you're in Hawaii or Washington D.C. as well. Didelphis includes three species: D. virginiana, D. marsupialis (the southern opossum), and D. albiventris (the white-eared opossum). Male 'possums have bifurcated, or branched, penes. The penis of the male opossum is "bifurcated" or split on the end. “I think it’s their tail,” says William Krause, professor of anatomy at the University of Missouri–Columbia and an ardent fan of opossums. After giving birth to embryo-size offspring, a female opossum carries her young in her pouch as they continue to develop. De Barros MA(1), Panattoni Martins JF, Samoto VY, Oliveira VC, Gonçalves N, Mançanares CA, Vidane A, Carvalho AF, Ambrósio CE, Miglino MA. 1, 31. The female opossum is a spontaneous ovulator with an estrous cycle of about 28 days.

The anatomy of the extraocular muscles was studied in 10 adult opossums (Didelphis albiventris) of both sexes.