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Wintonopus latomorum

Reptilia

Taxonomy
Wintonopus latomorum was named by Thulborn and Wade (1984). It is considered to be a form taxon. Its type specimen is QM F10319, a footprint, and it is a trace fossil. Its type locality is Lark Quarry dinosaur tracksite (QM), which is in a Cenomanian lacustrine sandstone/claystone in the Winton Formation of Australia.

Synonyms
Synonymy list
YearName and author
1984Wintonopus latomorum Molnar p. 155
1984Wintonopus latomorum Thulborn and Wade p. 421
1984Skartopus australis Thulborn and Wade p. 427
1990Skartopus australis Thulborn p. 95
1990Wintonopus latomorum Thulborn p. 119
1991Skartopus australis Molnar p. 660
1991Wintonopus latomorum Molnar p. 660
2006Skartopus australis Scanlon p. 276
2006Wintonopus latomorum Scanlon p. 280
2009Skartopus australis Gierlinski et al. p. 222
2011Wintonopus latomorum Romilio and Salisbury p. 72
2013Wintonopus latomorum Romilio et al. p. 115
2014Wintonopus latomorum Romilio and Salisbury p. 187
2016Skartopus australis Milner and Lockley p. 156
2016Wintonopus latomorum Milner and Lockley p. 156
2016Wintonopus latomorum Salisbury et al. p. 76
2021Wintonopus latomorum Duncan et al. p. 1
2021Wintonopus latomorum Leonardi and Carvalho p. 255
2021Skartopus australis Poropat et al. p. 37
2021Wintonopus latomorum Poropat et al. p. 40

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

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.

Wintonopus latomorum Thulborn and Wade 1984
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Invalid names: Skartopus australis Thulborn and Wade 1984 [synonym]
Diagnosis
ReferenceDiagnosis
R. A. Thulborn and M. Wade 1984(ichnogenus and ichnospecies): narrow trackway of small to medium-size digitigrade biped, with pace angulation about 160°. Footprint size index (SI) usually between 3.2 and 11.1 cm, but occasionally as high as 26.6 cm. No imprints of hand or tail. Footprints tridactyl (digits 2, 3 and 4), slightly broader than long (ratio FW/FL about 1.15), showing distinct positive rotation. Digits broad, with rounded or bluntly angular tips,without indications of phalangeal pads. Digit 3 longest, with sub-parallel sides. Digit 4 shorter and slightly narrower than digit 3, extended as blunt posterior salient. Digits 3 and 4 close together, parallel or only slightly divergent. Digit 2 shortest, and widely separated from digit 3 (with interdigital angle often about 60°). Imprints of digits 2 and 3 sometimes completely separated. Posterior margin of foot convex forwards. Ratio PL/FL usually between 8.0 and 13.5, rarely as low as 4.0 or as high as 15.0; ratio SL/FL usually between 16.0 and 24.0, rarely as low as 8.0 or as high as 27.0
R. A. Thulborn and M. Wade 1984 (Skartopus australis)(ichnogenus and ichnospecies): trackway of small digitigrade biped, with pace anguation about 150°. Footprint size index (SI) between 2.9 and 5.7 cm. No imprints of hand or tail. Footprints tridactyl (digits 2, 3 and 4), slightly longer than broad, (ratio FW/FL about 0.95) showing distinct positive rotation. Digit imprints narrow, straight and sharply pointed, without indications of phalangeal pads. Digit 3 longest; digits 2 and 4 about equal in length, and almost equally divergent from digit 3 (both interdigital angles abetween 25° and 30°). Imprint of digit 4 extends slightly farther back than imprint of digit 2, but does not form a posterior salient or 'spur'. Traces of small interdigital webs sometimes present. Posterior margin of footprint is an oblique line (posterolateral to anteromedial), either straight or arched forwards. In some examples there is an imprint of the metapodium: this is sub-rectangular in outline and roughly equivalent in length to digit 3. Ratio PL/FL usually between 5.5 and 8.5, rarely as low as 5.2 or as high as 9.1; ratio SL/FL usually between 11.0 and 16.0, rarely as low as 10.6 or as high as 17.3.
A. Romilio et al. 2013As for ichnogeneric diagnosis.
S. W. Salisbury et al. 2016Pedal tracks: very small to large size (proximodistal length 5–26 cm, mediolateral width 3.5–32 cm), tridactyl, mesaxonic, typically wider than long, with an average maximum proximodistal length to maximum mediolateral width ratio of 0.6–1.2; individual digital impressions proportionately moderately elongated and narrow (the maximum width of each digital impression is 13–41% of the total track length); the apex of individual digital impressions is typically rounded to bluntly acuminate; central digital impression (digit III) usually extends distally beyond the distal-most extent of the impressions of digit II and IV by between a fifth and a half of the total track length (digit extension to track length ratio 0.21–0.52), and the impressions of digits II and IV extend distally to approximately the same level relative to the principal track axis; the most proximal portion of the track is formed from the proximal part of the impression of digit IV; total divarication angle between the axes of impressions of digits II and IV is variable (58–108°); divarication of axes of impressions of digits II and III (26–66°) and that of digits III and IV (24–53°) are also variable; a metatarsodigital pad impression is rarely present; the proximal track margin is typically bilobed and asymmetrical, formed from the proximal margins of the impressions of digit II and IV with the concavity positioned more proximolaterally than proximomedially; the proximal margin of digital impression II is more distally positioned than that of digital impressions III and IV; ungual impressions typically absent. Trackway: typical pace angulation between 140° and 170°; typical stride length 11–24 times the maximum pedal track length; typical pace 6–12 times the maximum pedal track length. Pedal tracks are inwardly rotated relative to the trackway midline.