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Walmadanyichnus hunteri
Taxonomy
Walmadanyichnus hunteri was named by Salisbury et al. (2016). It is considered to be a form taxon. Its type specimen is WAM 12.1.16, cast of UQL-DP11-5, a footprint, and it is a trace fossil. Its type locality is UQL-DP11 tracksite (PROXY), which is in a Valanginian/Barremian delta plain sandstone in the Broome Sandstone Formation of Australia. It is the type species of Walmadanyichnus.
Synonymy list
| Year | Name and author |
|---|---|
| 2016 | Walmadanyichnus hunteri Salisbury et al. p. 83 |
| 2019 | Walmadanyichnus hunteri Bell et al. p. 2 |
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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.
†Walmadanyichnus hunteri Salisbury et al. 2016
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. W. Salisbury et al. 2016 | Pedal tracks: small- to large-sized (proximodistal length 12.9–80 cm, mediolateral width 12.1–81 cm), tridactyl, mesaxonic (digital impression extension to track length ratio 0.20–0.28), as wide as long, with an average maximum track length to maximum track width ratio of approximately 1.0–1.1; circular track shape; individual digital impressions rounded to circular, with the impression of digit III typically being the broadest impression (maximum digital impression width to track length ratio of 0.32–0.49) being widest at the mid-length of the digital impression; the widest part of impression of digit II (0.22–0.37) is also at the mid-length of the digital impression, whereas for the impression digit IV (0.25–0.41) it is typically more proximal; central digital impression (digit III) longer than the impressions of digits II and IV, which extend distally to approximately the same level relative to the principal track axis; axes of the impressions of digits III and VI typically intersect distal to the intersection of the axes of the impressions of digits II and III; total divarication angle between the axes of impressions of digits II and IV 55–77°; divarication of axes of the impressions of digits II and III (17–56°) and that for digits III and IV (21–46°) are variable; the impression of digit II is typically distally the most acuminate of the digital impressions; digital impressions have a single pad impression, with the formula of 1/II, 1/III, 1/IV; on well-preserved tracks, the impression of digits II and III form distinct and separate impressions, whereas the proximal end of the impression of digit IV is continuous with the single, large metatarsodigital pad impression; the proximal margin of the metatarsodigital pad impression is generally rounded, although it may be bilobed on the proximolateral margin; hallucal impression absent on all tracks. |