New<scp>M</scp>iddle<scp>C</scp>ambrian bivalved arthropods from the<scp>B</scp>urgess<scp>S</scp>hale (<scp>B</scp>ritish<scp>C</scp>olumbia,<scp>C</scp>anada)
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Abstract The morphology of two new bivalved arthropods, L oricicaris spinocaudatus gen. et sp. nov. and N ereocaris briggsi sp. nov. from the m iddle C ambrian ( S eries 3, S tage 5) B urgess S hale F ormation ( C ollins Q uarry locality on M ount S tephen, Y oho N ational P ark, B ritish C olumbia, C anada), is described. The material was originally assigned to the genus B ranchiocaris , but exhibits distinctive character combinations meriting its assignment to other taxa. L oricicaris spinocaudatus possesses an elongate and spinose abdomen comparable to the contemporaneous P erspicaris and C anadaspis , as well as chelate second head appendages and subtriangular exopods, comparable to B ranchiocaris . N ereocaris briggsi possesses a laterally compressed carapace, elongate and delicate appendages and a medial eye located between a pair of lateral eyes on a rhomboidal eye stalk. Although undoubtedly congeneric with N ereocaris exilis from a slightly younger horizon of the B urgess S hale F ormation, N . briggsi differs in overall proportions and segment number, warranting assignment to a new species. The newly described taxa were coded into an extensive cladistic analysis of 755 characters, and 312 extinct and extant panarthropods, including a variety of C ambrian bivalved arthropods from both the B urgess S hale and the C hengjiang L agerstätten. Cambrian bivalved arthropods consistently resolved as a paraphyletic assemblage at the base of A rthropoda. Important innovations in arthropod history such as the specialization of the deutocerebral head appendages and a shift from a nekton‐benthic deposit feeding habit to a benthic scavenging/predatory habit, the symplesiomorphic feeding condition of E uarthropoda (crown‐group arthropods), were found to have occurred among basal bivalved arthropods.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.006 | 0.061 |
| Meta-epidemiology (narrow) | 0.005 | 0.005 |
| Meta-epidemiology (broad) | 0.007 | 0.003 |
| Bibliometrics | 0.002 | 0.004 |
| Science and technology studies | 0.006 | 0.007 |
| Scholarly communication | 0.002 | 0.003 |
| Open science | 0.010 | 0.002 |
| Research integrity | 0.008 | 0.009 |
| Insufficient payload (model declined to judge) | 0.003 | 0.021 |
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