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Kayentapus hopii

Reptilia

Taxonomy
Kayentapus hopii was named by Welles (1971). It is considered to be a form taxon. Its type specimen is UCMP 83668, a footprint (cast of trackway I (5 prints)), and it is a trace fossil. Its type locality is Moenkopi Wash tracksite, UCMP V6898, which is in a Sinemurian/Pliensbachian terrestrial mudstone in the Kayenta Formation of Arizona.

Synonymy list
YearName and author
1971Kayentapus hopii Welles p. 32 fig. 2
1986Kayentapus hopii Lockley p. 16
1986Kayentapus hopii Morales p. 14
1986Kayentapus hopii Morales and Colbert p. 21
1992Kayentapus hoppi Weems p. 124
1993Kayentapus hopii Irby p. 19
1996Kayentapus hopii Irby p. 155
2000Kayentapus hopii Mietto et al. p. 67
2009Kayentapus hopii Milner et al. p. 6
2009Kayentapus hopii Xing et al. p. 24
2010Kayentapus hopii Li et al. p. 734 fig. 6
2011Kayentapus hopii Lockley et al. p. 331
2011Kayentapus hopii Niedźwiedzki p. 296
2011Kayentapus hopii Osi et al. p. 92
2011Kayentapus hopii Xing et al. p. 474
2013Kayentapus hopii Xing et al. p. 39
2015Kayentapus hopii Xing et al. p. 3
2016Kayentapus hopii Wagensommer et al. p. 166
2017Kayentapus hopii Sciscio et al. p. 17 fig. 6
2018Kayentapus hopii Gand et al. p. 201
2021Kayentapus hopii Li et al. p. 18
2023Kayentapus hopii Abrahams et al. p. 9
2023Kayentapus hopii Peng et al. p. 268

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
Sauropsida
RankNameAuthor
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Theropoda()
genusKayentapus
specieshopii

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Kayentapus hopii Welles 1971
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Diagnosis
ReferenceDiagnosis
S. P. Welles 1971Pes: Length of digit II, 160 to 175 [mm]; of III 205 to 240; of IV 180 to 192; of the foot 340 (left) and 355 (right); between tips of II and IV 290 to 295; projection of III beyond II and IV 120 to 135; divarication of II and III 26° to 42°; of III and IV 29° to 40°; of II and IV 60° to 72°. Length of pace 1880 to 1910; pace angulation 174° to 175°; divarication of III from midline 0; inter-pes distance 40 to 100; ratio of pace to pes 5.50; metatarsal pad isolated.
A. R. C. Milner et al. 2009The ichnogenoholotypic trackway of Kayentapus (for K. hopii) demonstrates significant variation from print to print, making a morphological diagnosis for the taxon difficult to establish, but the ichnogenus may be characterized by slender digits that taper less and have less acute angles of divarication than those of either Grallator or Eubrontes. A more stringent, quantitative diagnosis also includes: length between 11.5–40 cm, metatarsophalangeal pad of digit IV well defined, and angle of divarication between digits III and IV greater than that between digits II and III.
Measurements
No measurements are available
Composition: hydroxyapatiteo
Entire body: yeso
Adult length: 10 to < 100o
Adult width: 1.0 to < 10o
Adult height: 1.0 to < 10o
Architecture: compact or denseo
Ontogeny: accretion, modification of partso
Grouping: solitaryo
Environment: terrestrialo
Locomotion: actively mobileo
Life habit: ground dwellingo
Diet: carnivoreo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2004-12-14 12:50:08
Modified: 2004-12-14 14:50:08
Source: o = order
Reference: Marsh 1875

Age range: base of the Sinemurian to the top of the Pliensbachian or 199.30000 to 182.70000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Sinemurian - Pliensbachian199.3 - 182.7USA (Arizona) Kayentapus hopii (type locality: 126606)