Sundrius

{{Short description|Genus of fossil montremes}}

{{Speciesbox

| fossil_range = Early Cretaceous (Albian), ~{{fossilrange|113|108}}

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| image_caption =

| display_parents = 2

| genus = Sundrius

| species = ziegleri

| authority = Rich et al., 2020

}}

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.{{Cite journal |last1=Rich |first1=Thomas H. |author-link1=Tom Rich |last2=Flannery |first2=Timothy F. |author-link2=Tim Flannery |last3=Evans |first3=Alistair R. |last4=White |first4=Matt |last5=Ziegler |first5=Timothy |last6=Maguire |first6=Alanna |last7=Poropat |first7=Stephen |last8=Trusler |first8=Peter |last9=Vickers-Rich |first9=Patricia |author-link9=Patricia Vickers-Rich |date=2020-10-01 |title=Multiple hypotheses about two mammalian upper dentitions from the Early Cretaceous of Australia |journal=Alcheringa: An Australasian Journal of Palaeontology |language=en |volume=44 |issue=4 |pages=528–536 |doi=10.1080/03115518.2020.1829042 |bibcode=2020Alch...44..528R |issn=0311-5518|url=https://research.monash.edu/en/publications/fbc7fb60-9a35-4c40-a7db-16d7d83bda95 }}{{Cite journal |last1=Flannery |first1=Timothy F. |author-link1=Tim Flannery |last2=Rich |first2=Thomas H. |author-link2=Tom Rich |last3=Vickers-Rich |first3=Patricia |author-link3=Patricia Vickers-Rich |last4=Ziegler |first4=Tim |last5=Veatch |first5=E. Grace |last6=Helgen |first6=Kristofer M. |date=2022-01-02 |title=A review of monotreme (Monotremata) evolution |journal=Alcheringa: An Australasian Journal of Palaeontology |language=en |volume=46 |issue=1 |pages=3–20 |doi=10.1080/03115518.2022.2025900 |issn=0311-5518|doi-access=free |bibcode=2022Alch...46....3F }}