Phylogenetic placement of a new paleoendemic pill scarab (Coleoptera: Hybosoridae: Ceratocanthinae) from the Udzungwa Mountains, Tanzania, triggers biogeographic interpretations
Bibliographic record
Abstract
A new pill scarab with peculiar carinate apical halves of the elytra, Balleriodes sphaera gen. et sp. nov., is described and illustrated from the Udzungwa Mountains, Tanzania. A phylogenetic analysis of 73 terminals and 3118 aligned positions from three DNA fragments placed Balleriodes within a newly recognized and strongly supported clade herein informally named the Synarmostes group. The group includes three monophyletic species-rich genera: African Melanophilharmostes and Pseudopterorthochaetes, as well as Synarmostes from Madagascar and the Comoro Islands. The discovery of the monotypic genus Balleriodes gen. nov. in Udzungwa highlights the importance of the ancient and exceptionally biodiverse chain of the Eastern Arc Mountains in Tanzania and Kenya. Three cases of overseas dispersal by the members of the Synarmostes group are hypothesized: Africa to Madagascar, Madagascar to Comoros, and Africa to Annobón. Preliminary biogeographical interpretation of the increasingly more resolved pantropical subfamily Ceratocanthinae is presented.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.006 | 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".