A diverse chitinozoan record from the Upper Ordovician (Katian) of the Cincinnati region (Kentucky, USA)
Bibliographic record
Abstract
Abstract Biostratigraphic characterization of the Upper Ordovician in the Cincinnati region is complicated by several issues including provincialism of conodonts and graptolites, their facies dependence, the lack of biostratigraphical resolution for conodonts, and the absence of graptolites from many sections. Our study of the MY-14-01 core from Maysville (Kentucky, USA), type area for the Maysvillian Regional Stage of the Cincinnatian Series, suggests that chitinozoan biostratigraphy has the potential to strengthen the existing biostratigraphic framework based on conodonts and graptolites. Our samples usually yielded abundant, well-preserved chitinozoans in diverse populations. Many of these taxa are present in biostratigraphic reference sections from other parts of the Laurentian paleocontinent (Quebec and Anticosti Island, Canada, and Nevada, USA) and Avalonia (England and Wales). Here we provide systematic descriptions of selected chitinozoan taxa, including those of 12 new species: Conochitina rudis , Tanuchitina hooksae , Belonechitina laciniata , Hercochitina andresenae , Hercochitina anningae , Hercochitina edingerae , Hercochitina krafftae , Hercochitina polygonia , Hercochitina tharpae , Clathrochitina mangle , Angochitina bascomae , and Nevadachitina soufianei. One new name combination is proposed: Belonechitina duplicitas (Martin, 1983). This study provides a robust starting point for further advancing the Katian chronostratigraphic framework of the U.S. midcontinent. UUID: http://zoobank.org/dc3e7fb1-a9ad-4681-8fec-701857abec4e
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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 | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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".