(page 1)

     Early Miocene

    Microleo is the smallest known thylacoleonid, being only the size of a Grey squirrel (Sciurus carolinensis).

    Microleo attenboroughi:

   M. attenboroughi, named for British naturalist David Attenborough, is currently known only from a palatal fragment containing an incomplete row of teeth, from the Early Miocene of the Riversleigh World Heritage Site, Queensland.  The anatomy of Microleo suggests it is the most primitive of all thylacoleonids, and that the family as a whole are basal vombatomorphs that form the sister taxon of all other Vombatomorphia.
palatal fragment of Microleo attenboroughi
Palatal fragment of Microleo attenboroughi.
View a comparison with that of Thylacoleo carnifex.
life reconstruction of Microleo attenboroughi - Peter Schouten
A life reconstruction of Microleo attenboroughi.  Courtesy: Peter Schouten.

    Late Oligocene - Middle Miocene

    Members of the genus Priscileo are small thylacoleonids about the size of a possum or cuscus.  The genus is currently represented by two species.

    Priscileo pitakantensis:

    P. pitakantensis known only from a rather poorly preserved fossil maxillary fragment and a few post-cranial bones recently found in the Late Oligocene Ngapakaldi Local Fauna at Lake Pitakanta in northeastern South Australia.

    Priscileo roskellyae:

    From the Early Miocene of the Riversleigh World Heritage Site, P. roskellyae is known from a complete skull and most of the dentition.

skull of Priscileo roskellyae
The skull of Priscileo roskellyae, shown as it was found in situ among an assemblage of the bones of other other animals.
life reconstruction of Priscileo roskellyae - Anne Musser
A life reconstruction of Priscileo roskellyae. Courtesy: Anne Musser.
back to: Locomotory Adaptations return to the introduction forward to: Tertiary Genera (page 2)

Website copyright © C. Campbell's NATURAL WORLDS.
Photographs and other illustrations (where indicated) are © C. Campbell's NATURAL WORLDS.
Other photos and images are © their respective owners.