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Wintonopus
Taxonomy
Wintonopus was named by Thulborn and Wade (1984). It is considered to be a form taxon. Its type is Wintonopus latomorum.
It was assigned to Ornithopoda by Thulborn and Wade (1984), Molnar (1984), Lockley (1992) and Romero Molina et al. (2003); and to Ornithopoda by Romilio and Salisbury (2011), Romilio et al. (2013), Salisbury et al. (2016) and Poropat et al. (2023).
It was assigned to Ornithopoda by Thulborn and Wade (1984), Molnar (1984), Lockley (1992) and Romero Molina et al. (2003); and to Ornithopoda by Romilio and Salisbury (2011), Romilio et al. (2013), Salisbury et al. (2016) and Poropat et al. (2023).
Species
W. latomorum (syn. Skartopus australis) (type species), W. middletonae
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1984 | Wintonopus Molnar p. 155 |
| 1984 | Wintonopus Thulborn and Wade p. 421 |
| 1984 | Skartopus Thulborn and Wade p. 427 |
| 1992 | Skartopus Lockley p. 277 |
| 1992 | Wintonopus Lockley p. 277 |
| 2003 | Skartopus Romero Molina et al. p. 26 |
| 2003 | Wintonopus Romero Molina et al. p. 26 |
| 2009 | Skartopus Gierlinski et al. p. 222 |
| 2011 | Wintonopus Romilio and Salisbury p. 72 |
| 2013 | Wintonopus Romilio et al. p. 114 |
| 2016 | Wintonopus Salisbury et al. p. 76 |
| 2023 | Skartopus Poropat et al. p. 175 |
| 2023 | Wintonopus Poropat et al. p. 178 |
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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.
G. †Wintonopus Thulborn and Wade 1984
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†Wintonopus latomorum Thulborn and Wade 1984
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Invalid names: Skartopus australis Thulborn and Wade 1984 [synonym]
†Wintonopus middletonae Salisbury et al. 2016
Invalid names: Skartopus Thulborn and Wade 1984 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| 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) | (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. 2013 | Small- to medium-sized (<0.3 m long), tridactyl, mesaxonic pes impressions that are wider than long. Digit impressions are cranially directed and are short in length, with digit III being the longest, and digit IV being equivalent to or longer than digit II. The proximal track margin is more concave proximomedially than proximolaterally, with the proximal margin of the digit IV impression more proximally positioned relative to the impression of digit II. Both digit II and IV impressions extend farther proximally than the digit III impression. A metatarsophalangeal pad impression is absent, and claw impressions, when present, are pointed to rounded. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Benton 1983, Marsh 1875 | |||||
Age range: base of the Sinemurian to the top of the Cenomanian or 199.30000 to 93.90000 Ma
Collections (13 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Hettangian | Poland (Swietokrzyskie) | W. sp. (28334) | |
| Sinemurian | Australia (Queensland) | Skartopus sp. (60756) | |
| Late/Upper Jurassic | China (Yunnan) | W. sp. (202733 202734) | |
| Valanginian - Barremian | Australia (Western Australia) | Ornithopoda indet. (139575) W. latomorum (185878 185879) W. middletonae (185873 185874 185875) | |
| Cenomanian | Australia (Queensland) | Ornithopoda indet., Coelurosauria indet. (28606) W. latomorum, Skartopus australis (62556 225328) |