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Calorckosauripus lazari
Taxonomy
Calorckosauripus lazari was named by Meyer et al. (2018). It is considered to be a form taxon. Its type specimen is trackway S 1080.01 (trackway segment: cast and holotype NMB SA.M.2, a footprint, and it is a trace fossil. Its type locality is Cal Orcko tracksite, which is in a Maastrichtian lacustrine - large limestone/packstone in the El Molino Formation of Bolivia.
It was considered a nomen dubium by Leonardi et al. (2021).
It was considered a nomen dubium by Leonardi et al. (2021).
Synonymy list
| Year | Name and author |
|---|---|
| 2018 | Calorckosauripus lazari Meyer et al. p. 231 fig. 10 |
| 2020 | Calorckosauripus lazari Krapovickas et al. p. 453 |
| 2020 | Calorckosauripus lazari Moreau et al. p. 10 |
| 2021 | Calorckosauripus lazari Poropat et al. p. 30 |
| 2022 | Calorckosauripus lazari Tomaselli et al. p. 11 |
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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.
†Calorckosauripus lazari Meyer et al. 2018
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. A. Meyer et al. 2018 | Pes tracks are entaxonic and always longer than wide (average PL: 49 cm, and PW: 42; PL/PW: 1.6), but with a shape that is variable from slightly elliptical to bell-shaped, with a narrow “heel” and a wider anterior area. The phalangeal region is generally the deepest part of the track (e.g., Figs 8–10), although with a certain degree of variability, due to locomotion- or sediment-related preservation issues. Pes impressions are slightly rotated outward, with the left pedes sometimes rotated to a higher angle (S1150.01: 17.5°) than the right (S1150.01: 7.5°). Digit impressions are not present and only one of the tracks analysed (Fig. 8) shows a deeper area that might correspond to digit I impression. Pes impressions are slightly rotated outward, with the left pedes sometimes rotated by a higher angle (S1150.01: 17.5°) than the right (S1150.01: 7.5°). Manus tracks are always wider than long (average ML: 34 cm, and MW: 29 cm; ML/MW: 1.17). When not (partially) overprinted and deformed by the pes impression, the manus is horseshoe-shaped, with two clear lobes corresponding to digits I and V. In Fig. 8, the lobes are fainter, with only the one corresponding to digit I discernible. No claw marks are present. Generally, manus tracks are outward rotated (20–60°), with the deepest part of the track constantly on the external side. Trackway heteropody is marked, but not extreme (e.g., 1: 1.85), with the manus being roughly half of the size of the pes. The gauge is wide/intermediate, with a PTR that varies from 22–34%. Despite being highly variable, trackways S1080.01 and S1080.02 show a trend, whereby most of the manus tracks on the left side of the trackway are impressed more internally than on the right side, where the tracks are impressed more externally. The latter could be the results of walking on a palaeoslope along the shoreline. Glenoacetabular distance is fairly constant and estimated around 2.8 m. Hip height in S 1120.01 (type trackway) reaches 2.24 cm and stride averages at 2.29 m. |
Measurements
No measurements are available
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| Source: infrao = infraorder | |||||
| Reference: Marsh 1875 | |||||
Age range: Maastrichtian or 72.10000 to 66.00000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Santonian - Maastrichtian | Bolivia (Chuquisaca) | Sauropoda indet. (219395) | |
| Maastrichtian | Bolivia (Potosí) | Calorckosauripus lazari (219411) | |
| Maastrichtian | Bolivia (Chuquisaca) | Titanosauridae indet. (type locality: 36234) |