A new species of<i>Waengsjoeaspis</i>(Cephalaspidomorpha, Osteostraci) from the Early Devonian of northwestern Canada, with a redescription of<i>W. nahanniensis</i>and implications for growth, variation, morphology, and phylogeny
Bibliographic record
Abstract
ABSTRACT The Lower Devonian (Lochkovian) Man On The Hill (MOTH) Lagerstätte preserves a large diversity of early vertebrates fossils, including several species of osteostracan. Waengsjoeaspis nahanniensis had previously been named on the basis of material from MOTH and is redescribed herein. The genus Waengsjoeaspis Janvier was originally established in 1985 for two species from Spitsbergen. In addition, the new species Waengsjoeaspis platycornis is recognized. Both species from MOTH lack barbs on their cornual processes. The new species differs from W. nahanniensis in proportions of the cornual processes and of the median field. New specimens from MOTH clarify the condition of the infraorbital sensory line, the mouth, and other morphological features within the genus, and confirm that the dermoskeleton grew like that of Superciliaspis by separate ossification of tesserae, fusion of tesserae to form larger units, and centrifugal growth of these units. The new observations are consistent with the earlier phylogenetic placement of Waengsjoeaspis within a clade basal to the Benneviaspidida and add to the considerable diversity of osteostracans at this important locality.
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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 | 0.000 | 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".