The status of two fossils assigned to the scorpion genus Palaeophonus and its interpretation as a senior synonym of Allopalaeophonus
Why this work is in the frame
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Bibliographic record
Abstract
Palaeophonus arctus Matthew, 1895, from the late Carboniferous Fern Ledges of Nova Scotia, Canada, and Palaeophonus lightbodyi Kjellesvig-Waering, 1954, from the Silurian of Ludford Lane in England, are problematic names proposed for fossil scorpions (Arachnida: Scorpiones). Matthew's name has been widely overlooked in the literature, but features in online resources such as the Paleobiology Database, where it currently extends the stratigraphic range of the genus Palaeophonus Thorell & Lindström, 1884 from the Silurian into the Carboniferous. The fossil on which it is based cannot be interpreted with confidence as a scorpion. Kjellesvig-Waering's name is based on an isolated pedipalp chela, which lacks characters justifying its placement in Palaeophonus or any other Palaeozoic scorpion genus. Both names are treated here as nomina dubia. We also take the opportunity to synonymize Allopalaeophonus Kjellesvig-Waering, 1986 with Palaeophonus. These two mid-Silurian genera are currently placed in separate infraorders, but the holotype of Allopalaeophonus caledonicus (Hunter, 1886) is very similar in habitus to the type species of Palaeophonus: Palaeophonus nuncius Thorell & Lindström, 1884. The single character currently separating the genera, mesosomal sternite shape, is unconvincing.
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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 it