Variation and taxonomy of Asiamerican eutherian mammal<i>Paranyctoides</i>
Bibliographic record
Abstract
A parsimony analysis of the distribution of 408 characters in 73 taxa of Cretaceous eutherians and related taxa places three species of Paranyctoides, the Asiatic P. quadrans and the North American P. sternbergi and P. maleficus, into a monophyletic taxon supported by three unambiguous synapomorphies. In this analysis P. quadrans has three autapomorphies, but in the analysis using combined terminal taxon for the entire sample of North American Paranyctoides two of these autapomorphies (development of stylar cusps C and D on upper molars) disappeared because these characters are also variably present in the North American sample. The remaining autapomorphy of P. quadrans, m3 shorter than m2, is known from a single specimen and also may be affected by individual variation. The North American sample of Paranyctoides cannot be clearly separated into distinct species on morphological or morphometric grounds and is considered as representing a single species, P. sternbergi Fox, 1979 (= P. maleficus Fox, 1984, syn. nov.). It differs from the Asiatic P. quadrans (Nesov, 1993) only in having a sharp lingual ridge on p5 and m3 longer than m2. Paranyctoides is the sister taxon to Zhelestidae; this clade is supported by four unambiguous synapomorphies.
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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 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".