Large, Robust Cruziana from the Middle Triassic of Northeastern British Columbia: Ethologic, Biostratigraphic, and Paleobiologic Significance
Bibliographic record
Abstract
Abstract Large (up to 9.5 cm wide) and robust Cruziana ichnofossils are present in the Middle Triassic (Ladinian) Toad and Liard formations in northern British Columbia, Canada. These trace fossils are the first definitive occurrences of large Cruziana from post-Paleozoic marine strata. These traces, assigned to a new ichnospecies (Cruziana seilacheri), are similar in many respects to traces from the Lower Paleozoic, including the Cambrian ichnotaxon Cruziana rusoformis and the Ordovician ichnotaxon Cruziana furcifera. The morphology and orientation of scratchmarks in these traces suggest that they may have been constructed by either stomatopod or decapod crustaceans. The similarity of the Toad-Liard Cruziana to lower Paleozoic forms and their presence in post-Paleozoic marine rocks demonstrate that care should be taken when utilizing these traces as indicators of either Paleozoic deposition or a specific tracemaker.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.006 | 0.000 |
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 teacher head, 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".