Montirictus

{{Short description|Extinct genus of mammaliamorphs}}

{{Automatic taxobox

| fossil_range = {{fossilrange|Barremian|Aptian|Barremian-Aptian}}

| taxon = Montirictus

| authority = Matsuoka et al., 2016

| type_species = Montirictus kuwajimaensis

| type_species_authority = Matsuoka et al., 2016

}}

Montirictus is an extinct genus of tritylodonts known from the Early Cretaceous Kuwajima Formation of Japan. It was among the latest surviving tritylodontids, and is closely related to the earlier Xenocretosuchus from mainland Asia, and the Jurassic Stereognathus from the UK.{{cite journal |author=Matsuoka, H. |author2=Kusuhashi, N. |author3=Corfe, I.J. | date = July 2016 | title = A new early Cretaceous tritylodontid (Synapsida, Cynodontia, Mammaliamorpha) from the Kuwajima Formation (Tetori Group) of Central Japan| journal = Journal of Vertebrate Paleontology | volume = 36 | issue = 4 | pages = e1112289 | doi = 10.1080/02724634.2016.1112289|bibcode=2016JVPal..36E2289M | s2cid = 130588924 }} It may be a species of the genus Stereognathus,{{cite journal |first1=A.O. |last1=Averianov |first2=T. |last2=Martin |first3=A.V. |last3=Lopatin |first4=J.A. |last4=Schultz |first5=P.P. |last5=Skutschas |first6=S. |last6=Rico |first7=S.A. |last7=Krasnolutskii |year=2017 |title=A tritylodontid synapsid from the Middle Jurassic of Siberia and the taxonomy of derived tritylodontids |journal=Journal of Vertebrate Paleontology |volume=37 |issue=5 |pages=e1363767 |doi=10.1080/02724634.2017.1363767 |bibcode=2017JVPal..37E3767A |s2cid=90249441 }} but resolution of its affinities conditions upon the discovery of additional material.{{cite journal | last1 = Panciroli | first1 = E. | last2 = Walsh | first2 = S. | last3 = Fraser | first3 = N.C. | last4 = Brusatte | first4 = S.L. | last5 = Corfe | first5 = I. | title = A reassessment of the postcanine dentition and systematics of the tritylodontid Stereognathus (Cynodontia, Tritylodontidae, Mammaliamorpha), from the Middle Jurassic of the United Kingdom | journal = Journal of Vertebrate Paleontology | volume = 37 | issue = 5 | page = e1351448 | date = 2017 | doi = 10.1080/02724634.2017.1351448 | doi-access = free | bibcode = 2017JVPal..37E1448P | hdl = 20.500.11820/b140e841-1ad5-4cbe-aad7-7bb588f9f0c1 | hdl-access = free }}