Fossil hermit and land crabs (Decapoda: Anomura, Brachyura) from the Quaternary of Antigua and Bermuda
Bibliographic record
Abstract
Uncatalogued fossil crabs from Antigua and Bermuda deposited in the Department of Paleobiology, Smithsonian Institution, National Museum of Natural History (USNM) includes the remains of the hermit crab CoenobitaLatreille, 1829 and the land crabs Gecarcinus Leach, 1814 and Cardisoma Latreille, in Latreille, Le Peletier, Serville & Guérin, 1828. Fossil remains of terrestrial crabs are uncommon in the fossil record due to a number of preservation biases, thus, even isolated or fragmentary, their fossils aid in our understanding of the evolution and geographic distribution of these taxa through time. The remains of Cardisoma and presumably Gecarcinus from the late Pleistocene of Bermuda represent the first record of fossil crustaceans from the island, and one of the only fossil records of the genera known to date, whereas the fossil hermit crab remains from the Holocene of Antigua represent the second record of fossil Coenobita worldwide.
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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 | 0.001 | 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 | 0.000 | 0.002 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".