This clade was left unranked by the proposers, who do not apply Linnaean hierarchy. It was arguably defined only in order to contain Monotremata and Ausktribosphenida.
"australosphenida." YourDictionary, n.d. Web. 14 January 2019. <https://www.yourdictionary.com/australosphenida>.
australosphenida. (n.d.). Retrieved January 14th, 2019, from https://www.yourdictionary.com/australosphenida
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