Kryoryctes is a genus of prehistoric monotreme mammal from the Early Cretaceous (Albian) Eumeralla Formation[1] of Victoria, Australia from the Otway Group of Dinosaur Cove.

[2] Kryoryctes cadburyi is distinguished by the authors from all extant monotremes, as well as from fossil tachyglossids, by the presence of a broad, marginated, shallow bicipital sulcus on the proximal humerus, which extends distally onto the waist of the bone.

Pridmore et al find these features sufficient to distinguish it from Steropodon as well as other non-tachyglossid but similar monotremes such as Obdurodon, Kollikodon, Teinolophos and Monotrematum.

[2] Pridmore et al. determined on the basis of the expanded distal and proximal ends of its humerus that the animal was likely adapted for a burrowing lifestyle.

[3] The humerus was first noted to be similar in morphology to extant tachyglossids, but Kryoryctes is not allied it with this clade based on a number of important elements which differ between it and all known members of the family.