Same as Didelphys and the preferred (though erroneous) form, under the rule of priority.(noun)
The Century Dictionary (Public Domain)
Use "didelphis" in a sentence
"At this period domestic animals were not numerous in the Moluccas, but among the wild animals the most curious were the _babiroussa_, an enormous wild boar with long tusks bent backwards; the opossum, a kind of didelphis a little larger than our squirrel; the phalanger,"