Ausktribosphenidae

Ausktribosphenidae
Temporal range: Middle Cretaceous
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Clade: Synapsida
Class: Mammalia
Subclass: Yinotheria
Infraclass: Australosphenida
Family: Ausktribosphenidae
Rich et al., 1997
Genera

Ausktribosphenidae is a group name that has been given to some rather puzzling fossils—Ausktribosphenos nyktos and Bishops whitmorei—which[1]

Ausktribosphenidae and monotremes have been assigned to the larger group Australosphenida. But Australosphenida is a group which has been defined only in order to include the Ausktribosphenidae and monotremes - in other words, it may be just a fiction, unless someone finds a fossil which can sensibly be described as a "basal australosphenid" (member of the Australosphenida which belongs to neither Ausktribosphenidae nor monotremes).

References

  1. "Mammalia - Palaeos".
  2. Christopher R. Scotese. "New Oceans Begin to Open". Paleomap project. Retrieved 20 September 2010.


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