Kryoryctes is a monotreme for sure, maybe

Australian Zoologist 2026 Open access

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Authors: Thomas H. Rich, Patricia Vickers-Rich
DOI: 10.1071/az25002
Cited by: 1
References: 3

Abstract

A partial humerus of Kryoryctes cadburyi characterised as ‘tachyglossid-like’ but 100 million years older than the oldest known tachyglossid (echidna) fossil is likely to be a stem monotreme. However, there are a few features of the fossil that are more reminiscent of a therian than a monotreme.

Fields of Study & Subjects

Fossil Insects in Amber Paleontology and Evolutionary Biology Paleontology and Stratigraphy of Fossils

Publication details

Journal / source
Australian Zoologist
Publisher
CSIRO Publishing
Volume
45
Issue
1
Publication date
10 February 2026
Language
EN