[D] Tenontosaurus tilletorum [Su] [sG] [T]
Describer
Ostrom, 1970
Time
Cretaceous Early Aptian
Classification
Ornithischia Ornithopoda Iguanodontia Iguanodontidae
Diet
Herbivore
Fossilsite
Cloverly Formation, Montana; Cedar Mountain Formation, Utah ; ?Antlers Formation Oklahoma; ?Antlers Formation, ?Paluxy Formation, Texas, US
Length
7.5 meter
Info
Genus - Typespecies - Skull
Tenontosaurus tilletorum (Ostrom, 1970) = Tenantosaurus (Brown vide Chure & McIntosh, 1989)
Tenontosaurus tilletorum (Ostrom, 1970) > Eureodon (Brown vide Olshevsky, 1991) Tenontosaurus “dossi” ( Jacobs, 1995 versus Winkler, Murry and Jacobs, 1997)
Tenontosaurus tilleti was named “for theLloyd Tilett family”, thus the species-group name must be modified (ICZN 34.3) to “tilletorum” because the “Tilett family” undoubtedly includes both men and women: “if of man (men) and woman (women) together.” ICZN 31.1.2
Approximately 27 skeletons, cranial and postcranial elements, teeth. Holotype- (AMNH 304) partial skeleton lacking skull, cervical series and scapulacoracoid Paratypes- (YPM 5456) skull, partial skeleton (YPM-PU 16338) partial skeleton lacking skull, cervical series and scapulacoracoid
Comment
George Olshevsky emended this spesies to Tenontosaurus tillettorum in 1991, as it was named after the Tillett family and species honoring multiple individuals must have the -orum suffix. The ICZN has proclaimed this emendation unjustified, so the original name remains.
Tenontosaurus has a recorded size range from 1.5 m to more than 7.5 m (Dodson,1980) and some of the features that distinguish if from the Hypsilophodontidae other than Thescelosaurus may simply reflect the greater body size and robustness of this genus.
Tenontosaurus differs from Hypsilophodontidae in the absence of the permaxillarly teeth, the presence of three, rather than four, phalanges in digit III of the manus, and a prepubic process that is narrower transversely than deep dorsoventrally. Is shares these characters with the Iguanodontidae but lacks the other diagnostic synapomorphies of that group (including Dryosaurus) and, pending a detailted revision of thes genus, is best regarded as representing an as yet unnamed higher taxon of advanced ornithopods. The skull is long and moderately deep and has very large, subrectangular orbits.
Carpenter & Ishida (2010) Early and “Middle” Cretaceous Iguanodonts in Time and Space Journal of Iberian Geology 36 (2) 145-164
Tenontosaurus tilletorum Ostrom 1970
Locality
central northern Wyoming - central southern Montana. USA; near Price, Utah?; near Milsap, Parker County, Texas.
Horizon
Himes Member, Cloverly Formation; Mussentuchit Member, Cedar Mountain Formation; Paluxy Formation.
Age
Aptian (Chen and Lubin, 1997; May et al. 1995; Jacobs and Winkler 1998)
Comments
Tenontosaurus tilleti was named “for the Lloyd Tilett family”, thus the species-group name must be modified (ICZN 34.3) to “tilletorum” because the “Tilett family” undoubtedly includes both men and women: “if of man (men) and woman (women) together.” ICZN 31.1.2.
There are many specimens of ilia, but only three are shown to represent the variation. In the smallest specimen, which is about half the size of the larger two specimens, the body and the preacetabular notch are shallower and presumably reflect ontogeny. Further variation includes relative depth and length of the suprailiac notch. The brevis shelf is narrow.
Ostrom, 1970
Time
Cretaceous Early Aptian
Classification
Ornithischia Ornithopoda Iguanodontia Iguanodontidae
Diet
Herbivore
Fossilsite
Cloverly Formation, Montana; Cedar Mountain Formation, Utah ; ?Antlers Formation Oklahoma; ?Antlers Formation, ?Paluxy Formation, Texas, US
Length
7.5 meter
Info
Genus - Typespecies - Skull
Tenontosaurus tilletorum (Ostrom, 1970) = Tenantosaurus (Brown vide Chure & McIntosh, 1989)
Tenontosaurus tilletorum (Ostrom, 1970) > Eureodon (Brown vide Olshevsky, 1991) Tenontosaurus “dossi” ( Jacobs, 1995 versus Winkler, Murry and Jacobs, 1997)
Tenontosaurus tilleti was named “for theLloyd Tilett family”, thus the species-group name must be modified (ICZN 34.3) to “tilletorum” because the “Tilett family” undoubtedly includes both men and women: “if of man (men) and woman (women) together.” ICZN 31.1.2
Approximately 27 skeletons, cranial and postcranial elements, teeth. Holotype- (AMNH 304) partial skeleton lacking skull, cervical series and scapulacoracoid Paratypes- (YPM 5456) skull, partial skeleton (YPM-PU 16338) partial skeleton lacking skull, cervical series and scapulacoracoid
Comment
George Olshevsky emended this spesies to Tenontosaurus tillettorum in 1991, as it was named after the Tillett family and species honoring multiple individuals must have the -orum suffix. The ICZN has proclaimed this emendation unjustified, so the original name remains.
Tenontosaurus has a recorded size range from 1.5 m to more than 7.5 m (Dodson,1980) and some of the features that distinguish if from the Hypsilophodontidae other than Thescelosaurus may simply reflect the greater body size and robustness of this genus.
Tenontosaurus differs from Hypsilophodontidae in the absence of the permaxillarly teeth, the presence of three, rather than four, phalanges in digit III of the manus, and a prepubic process that is narrower transversely than deep dorsoventrally. Is shares these characters with the Iguanodontidae but lacks the other diagnostic synapomorphies of that group (including Dryosaurus) and, pending a detailted revision of thes genus, is best regarded as representing an as yet unnamed higher taxon of advanced ornithopods. The skull is long and moderately deep and has very large, subrectangular orbits.
Carpenter & Ishida (2010) Early and “Middle” Cretaceous Iguanodonts in Time and Space Journal of Iberian Geology 36 (2) 145-164
Tenontosaurus tilletorum Ostrom 1970
Locality
central northern Wyoming - central southern Montana. USA; near Price, Utah?; near Milsap, Parker County, Texas.
Horizon
Himes Member, Cloverly Formation; Mussentuchit Member, Cedar Mountain Formation; Paluxy Formation.
Age
Aptian (Chen and Lubin, 1997; May et al. 1995; Jacobs and Winkler 1998)
Comments
Tenontosaurus tilleti was named “for the Lloyd Tilett family”, thus the species-group name must be modified (ICZN 34.3) to “tilletorum” because the “Tilett family” undoubtedly includes both men and women: “if of man (men) and woman (women) together.” ICZN 31.1.2.
There are many specimens of ilia, but only three are shown to represent the variation. In the smallest specimen, which is about half the size of the larger two specimens, the body and the preacetabular notch are shallower and presumably reflect ontogeny. Further variation includes relative depth and length of the suprailiac notch. The brevis shelf is narrow.