Re‐evaluation of the Carboniferous tetrapod <i>Asaphestera platyris</i> with comments on the amniote fauna of the Joggins Formation, Canada
Bibliographic record
Abstract
Abstract ‘Microsaurs’ are problematic late Palaeozoic tetrapods that have been grouped with reptiles on the one hand, or regarded as close relatives of amniotes on the other. Early phylogenetic analyses that included broadly sampled tetrapod taxa placed ‘microsaurs’ as close relatives of amniotes. Several recent phylogenetic analyses have, by contrast, recovered ‘microsaurs’ as reptiles (i.e. within Amniota) and this has prompted some researchers to describe ‘microsaur’ taxa that have never been included in a phylogenetic analysis as amniotes. Prominent among these is Asaphestera platyris from the Joggins Formation, upper Carboniferous of Nova Scotia, Canada. A recent systematic review restricted this species to its holotype, argued that it is a synapsid, and transferred referred specimens to a new genus and species of ‘microsaur’. We re‐examined the holotype of Asaphestera platyris and have concluded that, whereas it is not a synapsid, there are no compelling diagnostic features, and so regard Asaphestera platyris to be a nomen dubium . This systematic revision removes an alleged synapsid from the Joggins fauna and, combined with our recent conclusions elsewhere that there is no support for the hypothesis that recumbirostran ‘microsaurs’ are amniotes, we affirm previous interpretations that view Hylonomus lyelli and Protoclepsydrops haplous as the only amniote elements in the Joggins Formation.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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".