Sundrius

Sundrius; Temporal range: Early Cretaceous (Albian), ~113–108 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Synapsida
Clade:	Mammaliaformes
Class:	Mammalia
Order:	Monotremata
Family:	† Kollikodontidae (?)
Genus:	† Sundrius
Species:	†S. ziegleri
Binomial name
	†Sundrius ziegleri; Rich et al., 2020

Last updated September 27, 2025

Sundrius is an extinct genus of probable monotreme mammal from the Late Cretaceous (Albian) Eumeralla Formation of Australia. The genus contains a single species, S. ziegleri, known from a broken molar.^[1]^[2]

References

↑ Rich, Thomas H.; Flannery, Timothy F.; Evans, Alistair R.; White, Matt; Ziegler, Timothy; Maguire, Alanna; Poropat, Stephen; Trusler, Peter; Vickers-Rich, Patricia (2020-10-01). "Multiple hypotheses about two mammalian upper dentitions from the Early Cretaceous of Australia". Alcheringa: An Australasian Journal of Palaeontology . 44 (4): 528–536. Bibcode:2020Alch...44..528R. doi:10.1080/03115518.2020.1829042. ISSN 0311-5518.
↑ Flannery, Timothy F.; Rich, Thomas H.; Vickers-Rich, Patricia; Ziegler, Tim; Veatch, E. Grace; Helgen, Kristofer M. (2022-01-02). "A review of monotreme (Monotremata) evolution". Alcheringa: An Australasian Journal of Palaeontology . 46 (1): 3–20. Bibcode:2022Alch...46....3F. doi: 10.1080/03115518.2022.2025900 . ISSN 0311-5518.

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[Rich2020-1] Rich, Thomas H.; Flannery, Timothy F.; Evans, Alistair R.; White, Matt; Ziegler, Timothy; Maguire, Alanna; Poropat, Stephen; Trusler, Peter; Vickers-Rich, Patricia (2020-10-01). "Multiple hypotheses about two mammalian upper dentitions from the Early Cretaceous of Australia". Alcheringa: An Australasian Journal of Palaeontology . 44 (4): 528–536. Bibcode:2020Alch...44..528R. doi:10.1080/03115518.2020.1829042. ISSN 0311-5518.

[Flannery2022-2] Flannery, Timothy F.; Rich, Thomas H.; Vickers-Rich, Patricia; Ziegler, Tim; Veatch, E. Grace; Helgen, Kristofer M. (2022-01-02). "A review of monotreme (Monotremata) evolution". Alcheringa: An Australasian Journal of Palaeontology . 46 (1): 3–20. Bibcode:2022Alch...46....3F. doi: 10.1080/03115518.2022.2025900 . ISSN 0311-5518.

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