<i>SULCIPENTAMERUS</i>(PENTAMERIDA, BRACHIOPODA) FROM THE LOWER SILURIAN WASHINGTON LAND GROUP, NORTH GREENLAND
Bibliographic record
Abstract
Abstract: The brachiopod Sulcipentamerus , previously considered a common endemic pentameride genus in the Lower Silurian (Aeronian) of South China, is reported from largely coeval strata in the Hauge Bjerge, Ymers Gletcher and Odins Fjord formations (Washington Land Group) of North Greenland. Two species are present. In eastern North Greenland, S . cf. dorsoplanus occurs in carbonate strata of Aeronian – early Telychian age, whereas in the western region, a new species, S . lunatus sp. nov., is described. The identification of both forms as Sulcipentamerus is indicated by their relatively long ventral median septum and dorsal inner hinge plates. The new species, Sulcipentamerus lunatus sp. nov., is characterized by a nonlobate shell, a narrow but sharply defined interarea bordering the delthyrium and a deeply concave pseudodeltidium. Despite the two known occurrences of the genus in South China and Greenland, the Sulcipentamerus ‐bearing Harpidium Fauna of North Greenland (northeastern part of Laurentia) was quite distinct from both the Aeronian–Telychian brachiopod faunas of South China and the southern half of Laurentia. In general, the Aeronian pentameride brachiopod faunas of these three regions are strongly endemic, in contrast to their more tightly clustered counterparts from Avalonia, Baltica, Siberia, Kazakhstan, Tadzhikistan, Kolyma and Novaya Zemlya.
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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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".