A new species of <i>Charnia</i> from the Ediacaran of Newfoundland reveals novel insights on the taxonomy, palaeobiology and palaeoecology of the Charnida (Rangeomorpha)
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
The genus Charnia is one of the most widely distributed rangeomorphs of the late Ediacaran fossiliferous assemblages; prior to this study there were two valid species. Here, we describe a third species, C. ewinoni sp. nov., based on material from the Bonavista and Avalon peninsulas of Newfoundland, Canada. The new species has unique traits, such as the ubiquitous presence of a long stem, a parallel-sided outline, strongly sigmoidal first-order branches and a medial suture that is comparatively less zig-zagged than in the type species. Hierarchical clustering and morphospace analyses support the creation of a new taxon, distinguishing C. ewinoni sp. nov. from the type material of C. masoni, which was found in Charnwood Forest (UK), and also from C. gracilis, which was recently described from a specimen found in the Shibantan Member of Dengying Formation, China. Taphonomic evidence, along with the peculiar orientations of the fossils on the Matthews Surface with respect to the inferred palaeocurrent, suggest the possibility of a reclining lifestyle for the new species, challenging previous reconstructions of the mode of life for this genus.http://zoobank.org/urn:lsid:zoobank.org:pub:0DE00682-B52B-4CEC-9CF8-1B64220212CA
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.
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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| 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 it