Machairoceratops

Holotype cranial Material and Cranial Reconstruction of Machairoceratops cronusi (UMNH VP 20550) gen. et sp. nov. Recovered cranial elements of Machairoceratops in right-lateral view, shown overlain on a ghosted cranial reconstruction (A). The jugal, squamosal and braincase are all photo-reversed for reconstruction purposes. Machairoceratops cranial reconstruction in dorsal (B), and right-lateral (C) views. Green circle overlain on the ventral apex of the jugal highlights the size of the epijugal contact scar (ejcs). Abbreviations: BC, braincase; boc, basioccipital; bpt, basipterygoid process; ej, epijugal; ejcs, epijugal contact scar; j, jugal; lpr, lateral parietal ramus; lsb, laterosphenoid buttress; m, maxilla; n, nasal; o, orbit, oc, occipital condyle; oh, orbital horn; on, otic notch; p, parietal; pf, parietal fenestra; pm, premaxilla; po, postorbital; poc, paroccipital process; p1, epiparietal locus p1; sq, squamosal. Scale bars = 0.5 m.

Locality map: Grand Staircase-Escalante National Monument, southern Utah. Map showing the Nipple Butte area (indicated by yellow star) of Grand Staircase-Escalante National Monument (GSENM). GSENM is bounded by the red rectangle and silhouetted in dark gray on the inset of Utah and surrounding states (modified from [1]). The original map has been modified to show the Nipple Butte area instead of the Machairoceratops fossil locality as in the original source. New location based on map in A New Macrovertebrate Assemblage from the Late Cretaceous (Campanian) of Southern Utah, page 601.

Locality map: Grand Staircase-Escalante National Monument, southern Utah. Map showing locality (indicated by star) of Nasutoceratops titusi holotype UMNH VP 16800, recovered from the Kaiparowits Formation of Grand Staircase-Escalante National Monument (GSENM). GSENM is bounded by the red rectangle and silhouetted in dark gray on the inset of Utah and surrounding states (modified from [1]). The original map has been modified to show Nasutoceratops instead of Machairoceratops as in the original source. New location based on map in Ceratopsid Dinosaurs from the Grand Staircase of Southern Utah, page 489.

Locality map: Grand Staircase-Escalante National Monument, southern Utah. Map showing locality (indicated by star) of Kosmoceratops richardsoni holotype UMNH VP 17000 and assigned subadult UMNH VP 16878, recovered from the Kaiparowits Formation of Grand Staircase-Escalante National Monument (GSENM). GSENM is bounded by the red rectangle and silhouetted in dark gray on the inset of Utah and surrounding states (modified from [1]). The original map has been modified to show Kosmoceratops instead of Machairoceratops as in the original source. New location based on map in Ceratopsid Dinosaurs from the Grand Staircase of Southern Utah, page 489.