Description of Calligenethlon watsoni based on Computed Tomography and Resulting Implications for the Phylogenetic Placement of Embolomeres
Bibliographic record
Abstract
Although Calligenethlon watsoni, an enigmatic embolomere from Joggins, Nova Scotia, has been known since 1934, an in-depth description of its anatomy and taxonomic diagnosis is missing from the literature, resulting in subsequent specimen referrals to be based largely on the nondiagnostic trait of small body size.Here, an exquisitely preserved Calligenethlon specimen is described in detail using micro-computed tomography.The anatomical knowledge gained here allowed for the re-evaluation of all referred specimens and creation of the first ever, robust morphological diagnosis of Calligenethlon.This anatomical data was then used to test the recent hypothesis that braincase characters unite embolomeres in a stem tetrapod position.A series of analyses, using the most up-to-date sampling of characters and relevant tetrapod taxa, resulted in the conclusion that embolomeres do group together in a stem tetrapod position, but braincase characters are seemingly uninfluential in this placement, and taxon sampling may be of greater significance.Firstly, I would like to thank my supervisor, Dr. Hillary Maddin for the continued support, advice, and belief that this project would work against all odds
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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 | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.002 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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".