Amphisauropus latus Haubold 1970
Bibliographic record
Abstract
Amphisauropus latus Haubold, 1970 (Fig. 4) MATERIAL EXAMINED. — Eight tracks preserved as concave epireliefs on slab M486_ 2022.1.5. DESCRIPTION The trackway is 13 cm long, 6 cm wide and composed of four consecutive pes/manus sets (Fig. 4A, B). Pes and manus stride is 6.4-6.5 cm long. The manus tracks are more internal than pes tracks. Both are small sized and semi-plantigrade. Pes imprints are pentadactyl and wider than long (PL = 1.1 cm, PW = 1.8-2.0 cm; Fig. 4). The PL/PW ratio is equal to 0.6. Digit imprints are short, straight to slightly curved and end in an enlarged rounded tip (Fig. 4 C-E). Pes tracks show a short, large and poorly impressed sole with concave proximal margin. The manus tracks are strongly oriented inward, forming an angle of up to 120° with the trackway axis. Manus imprints are pentadactyl and wider than long (ML = 0.9-1.1 cm; MW = 1.6-1.9 cm; ML/MW = 0.6). Imprints of digits are short and end in a small enlarged rounded tip. The manual digits II-III bent inwards. The divarication angle of digits I-V is up 153°. REMARKS As noted by Gand et al. (2000) Amphisauropus Haubold, 1970 shares similarities with Merifontichnus Gand, Garric, Demathieu & Ellenberger, 2000. Tracks from Le Bousquet differ from this latter by smaller size and the pedal digit I not parallel to the proximal margin of the sole. Although tracks from Le Bousquet share some similarities with Dolomitipes Marchetti, Voigt & Klein, 2017, this ichnogenus differs in showing manus tracks placed in line or slightly external to the pes, and pedal tracks longer than wide or about as wide as long and 40 to 250 mm long (Marchetti et al. 2019). Amphisauropus represents a widespread Permian ichnogenus that has been reported from many areas including Africa (Voigt et al. 2011; Hminna et al. 2012; Moreau et al. 2020); Argentina (Melchor & Sarjeant 2004); Canada (Mossman & Place 1989; van Allen et al. 2005); Europe (e.g. Gand & Haubold 1984; Gand 1987; Haubold 1971; Santi & Krieger 2001; Ptaszyński & Niedźwiedzki 2004; Voigt 2005; Avanzini et al. 2008; Voigt et al. 2012; Marchetti et al. 2015) and the United States (Lucas et al. 2001). In France, Amphisauropus was previously reported from the Lodève Basin (Gand & Durand 2006) and the Rodez Basin (Gand 1987). Although Gand (1987) reported Amphisauropus in several localities near Banassac-Canilhac this ichnogenus is here for the first time reported from Le Bousquet.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.012 | 0.004 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".