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Wintonopus middletonae

Reptilia -

Taxonomy
Wintonopus middletonae was named by Salisbury et al. (2016). It is considered to be a form taxon. Its type specimen is WAM 12.1.15, cast of UQL-DP14-7, a footprint, and it is a trace fossil. Its type locality is UQL-DP14 tracksite (PROXY), which is in a Valanginian/Barremian delta plain sandstone in the Broome Sandstone Formation of Australia.

Synonymy list
YearName and author
2016Wintonopus middletonae Salisbury et al. p. 80–81
2019Wintonopus middletonae Bell et al. p. 2

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
RankNameAuthor
Romeriida
Diapsida()
Eosuchia()
Neodiapsida
SauriaGauthier 1984
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
Neornithischia()
Ornithopoda()
genusWintonopus
speciesmiddletonae

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.

Diagnosis
ReferenceDiagnosis
S. W. Salisbury et al. 2016Pedal tracks: small- to medium-sized (proximodistal length 19–25 cm, mediolateral width 28–36.6 cm), tridactyl, mesaxonic (digital impression extension to track length ratio 0.3–37), wider than long, with an average maximum length to maximum width ratio approximately 0.7–0.8; individual digital impressions moderately elongated, broad, and generally oval in shape (the maximum width of each digital impression is 36–45% of the total track length, the latter measured along the principal track axis). The apex of the digital impression is typically rounded. The central digital impression (digit III) usually extends distally beyond the impressions of digits II and IV (relative to the principal track axis) by about a third of the track length; the impression of digit IV extends slightly farther proximally than that of digital impression II; axes of the impressions of digits II and III typically intersect distal to the intersection of the axes of the impressions of digits III and IV in large tracks, and at roughly the same position for smaller tracks; total divarication of the axes of impressions of digits II and IV is narrow (82–92°), as is the divarication of axes of impressions of digits II and III (27–47°) and digits III and IV (47–55°); single digital pad impressions of each digital impression may be present, with the formula of 1/II, 1/III, 1/IV; a metatarsodigital pad impression is absent, such that the proximal track margin is typically bilobed, with each lobe representing the proximal margins of the digital impressions of II and IV.