Mating systems of pseudocheirids, as already suggested by their diverse social organization, are rather variable. Several species are long-term monogamous, which may also include paternal care. Others, the solitary ones included, are polygamous, with evidence for shifts from monogamy to polygyny between years for the greater glider, depending on the food supply. Breeding in Petauroides is seasonal, one young per year being born in autumn to winter. The young stays in the pouch for 90-120 days, and is carried on the mother's back for another 90 days. Young become independent around 10 months of age, and sexually mature during their second year. The tropical ringtails, particularly those from New Guinea, seem to have no reproductive season. Consort relationships, an accompanying by a male for an estrous female for a few days, have been described for some species, nothing else is known about mating systems of the solitary ones. Number of young per litter is one or two, depending on the species, and it seems that, as far as known, the age of 120 days for leaving the pouch characterizes them all. Weaning occurs, again known only for
some species at 150-160 days (Pseudochirulus herbertensis) to 180 days (Pseudocheirusperegrinus). Females, at least in P. pere-grinus, are capable of producing two litters per year. Longevity in the wild is approximately four to five years.
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