Kolihapeltine trilobites, the spiniest scutelluids from the eastern <scp>A</scp>nti‐<scp>A</scp>tlas (<scp>M</scp>orocco, <scp>E</scp>arly <scp>D</scp>evonian): evolution, environment and classification
Bibliographic record
Abstract
Abstract New material from five localities in the Pragian and Emsian of the south‐eastern Moroccan Tafilalt and Ma'der regions sheds new light on the morphology and function of the entire exoskeleton of kolihapeltine trilobites and on their ecology and taphonomy. Entire and articulated specimens are preserved in what appear to be slumped obrution deposits. Monospecific cavity infillings in the Hamar Laghdad mounds are considered to have resulted from transport of sclerites from nearby gregarious assemblages. Development of pronounced spinosity is mainly interpreted as a defensive strategy. The overall morphology, in particular the elongated shape of the tail, and the absence of strongly developed muscle attachment areas, points to an epibenthic bottom life rather than a swimming lifestyle. Evolutionary trends mainly concern morphological changes in the shape of the pygidia that narrow considerably and elongate through time. We provide a systematic assessment of the subfamily Kolihapeltinae. Hitherto poorly known species of Kolihapeltis Prantl and Přibyl are reviewed and their diagnoses completed; two new taxa, K. bassei sp. nov. and K. tafilaltensis sp. nov., are described. Sagittapeltis Kim is emended after revision of its type species S. triangularis. A new species, S. belkai sp. nov., is described. The genus Andegavia Pillet is discarded after we show that its type species is an indeterminable scutelluid fragment. The new genus Heliopeltis with two species, H. ihmadii gen. et sp. nov. and H. johnsoni gen. et sp. nov., is erected.
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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 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 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".