北美犹他州坎潘期新栉龙亚科鸭嘴龙科恐龙
Rhinorex condrupus
崖埋 鼻王龙（新属、新种）
A new saurolophine hadrosaurid(Dinosauria: Ornithopoda) from the Campanian of Utah, North AmericaTerry A.Gates & Rodney Scheetz AbstractA new hadrosaurid is described from the UpperCretaceous Neslen Formation of central Utah. Rhinorex condrupus gen. et sp.nov. is diagnosed on the basis of two unique traits, a hook-shaped projectionof the nasal anteroventral process and dorsal projection of the posteroventralprocess of the premaxilla, and is further differentiated from other hadrosauridspecies based on the morphology of the nasal (large nasal boss on the posterodorsalcorner of the circumnarial fossa, small protuberences on the anterior process,absence of nasal arch), jugal (vertical postorbital process), postorbital (highdegree of flexion present on posterior process), and squamosal (inclinedanterolateral processes). This new taxon was discovered in estuarine sedimentsdated at approximately 75 Ma and just 250 km north of the prolificdinosaur-bearing strata of the Kaiparowits Formation, possibly overlapping intime with Gryposaurus monumentensis. Phylogenetic parsimony and Bayesiananalyses associate this new taxon with the Gryposaurus clade, even though thetype specimen does not possess the diagnostic nasal hump of the latter genus.Comparisons with phylogenetic analyses from other studies show that a current consensusexists between the general structure of the hadrosaurid evolutionary tree, buton closer examination there is little agreement among species relationships.
Rhinorex condrupus
崖埋 鼻王龙（新属、新种）
A new saurolophine hadrosaurid(Dinosauria: Ornithopoda) from the Campanian of Utah, North AmericaTerry A.Gates & Rodney Scheetz AbstractA new hadrosaurid is described from the UpperCretaceous Neslen Formation of central Utah. Rhinorex condrupus gen. et sp.nov. is diagnosed on the basis of two unique traits, a hook-shaped projectionof the nasal anteroventral process and dorsal projection of the posteroventralprocess of the premaxilla, and is further differentiated from other hadrosauridspecies based on the morphology of the nasal (large nasal boss on the posterodorsalcorner of the circumnarial fossa, small protuberences on the anterior process,absence of nasal arch), jugal (vertical postorbital process), postorbital (highdegree of flexion present on posterior process), and squamosal (inclinedanterolateral processes). This new taxon was discovered in estuarine sedimentsdated at approximately 75 Ma and just 250 km north of the prolificdinosaur-bearing strata of the Kaiparowits Formation, possibly overlapping intime with Gryposaurus monumentensis. Phylogenetic parsimony and Bayesiananalyses associate this new taxon with the Gryposaurus clade, even though thetype specimen does not possess the diagnostic nasal hump of the latter genus.Comparisons with phylogenetic analyses from other studies show that a current consensusexists between the general structure of the hadrosaurid evolutionary tree, buton closer examination there is little agreement among species relationships.
