Crittendenceratops

{{Speciesbox

| fossil_range = Campanian, {{fossilrange|73}}

| image = Crittendenceratops (cropped).jpg

| image_caption = Life reconstruction of C. krzyzanowskii

| display_parents = 2

| genus = Crittendenceratops

| parent_authority = Dalman et al., 2018

| species = krzyzanowskii

| authority = Dalman et al., 2018

}}

Crittendenceratops (meaning "horned face from the Fort Crittenden Formation") is a genus of horned centrosaurine ceratopsid dinosaur from the late Campanian Fort Crittenden Formation of Arizona. It contains a single species, C. krzyzanowskii, and represents the first species of dinosaur from the Fort Crittenden Formation to receive a formal scientific name.

Description

File:Crittendenceratops size.jpg

Crittendenceratops is distinguished by forward-curving, hook-like flanges located along the central portion of the top of the frill, "extensive" epiparietals located along the sides of the parietal portion of the frill, a thickening of the frill in the parietal portion, and a short, pronounced ridge on the surface of the squamosal portion of the frill.{{cite journal|first1=Sebastian G. |last1=Dalman |first2=John-Paul M. |last2=Hodnett |first3=Asher J. |last3=Lichtig |first4=Spencer G. |last4=Lucas |year=2018 |title=A new ceratopsid dinosaur (Centrosaurinae: Nasutoceratopsini) from the Fort Crittenden Formation, Upper Cretaceous (Campanian) of Arizona |journal=New Mexico Museum of Natural History and Science Bulletin |volume=79 |pages=141–164 |url=https://www.researchgate.net/publication/328637301}}

Classification

Crittendenceratops was assigned to the Nasutoceratopsini (which also includes Avaceratops, Nasutoceratops, and Yehuecauhceratops), a tribe of the ceratopsid subfamily Centrosaurinae, by Dalman et al. (2018). The cladogram below follows their phylogenetic analysis:

{{clade| style=font-size:85%; line-height:85%

|1={{clade

|1=Diabloceratops eatoni

|label2=Centrosaurinae

|2={{clade

|label1=Nasutoceratopsini

|1={{clade

|1=Yehuecauhceratops mudei

|2=Nasutoceratops titusi }}

|2={{clade

|1=Avaceratops lammersi

|2=MOR 692 }} }}