Scleritomes of chancelloria eros and sclerits from the middle Cambrian (Series 3, stage 5) of central Sonora, Mexico
Bibliographic record
Abstract
Fragments of scleritomes of Chancelloria eros from the middle Cambrian of Sonora, Mexico are reported for the first time. Chancelloriid scleritomes partially articulated and isolated sclerites belonging to Allonnia tintinopsis and Archiasterella sp. are widely distributed in reddish calcilutite of the El Gavilán Formation, in the Sahuaral section, central Sonora. The faunal association is represented by chancelloriids, spicules of reticulosan sponges, linguliform brachiopods, hyoliths and trilobites. The El Gavilán Formation is an open shelf sequence of 65 m thick, composed of calcilutite interbedded with thin-bedded marly limestone. Trilobite association allowed assigning the open shelf deposit to the middle Cambrian, Altiocculus Subzone, Ehmaniella Zone (Series 3, Stage 5). Chancelloriid genera of the El Sahuaral section may be compared with the biota of San Jose de Gracia, in central Sonora, México, and also with other mid-Cambrian shelf deposits around Laurentia as Burgess Shale in Canada and formations from Utah, USA. Cambrian rocks of Sonora were part of the southern-western border of Laurentia craton, which was located near the paleo-equator during Cambrian times.
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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 | 0.003 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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 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".