<i>Escarpia southwardae</i> sp. nov., a new species of vestimentiferan tubeworm (Annelida, Siboglinidae) from West African cold seeps
Bibliographic record
Abstract
A new species of vestimentiferan tubeworm belonging to the genus Escarpia is described from cold seeps off the western coast of Africa. The description is based on two collections (one of 180 animals, the other of 30 animals) using both morphological and molecular techniques. Morphologically, the African tubeworms are very similar to Escarpia laminata Jones, 1985 but differ from all other escarpids by the lack of branchial pinnules, a unique feature among vestimentiferans. Molecular evidence from sequences of the cytochrome-c oxidase subunit I gene places the species in the escarpid clade, closely related to E. laminata and Escarpia spicata Jones, 1985, but fails to discriminate among the three species. Four morphotypes are identified in the African species, corresponding to the four permutations of the following characters: presence or absence of an axial rod on the obturaculum and presence or absence of a split on the posterior ventral margin of the vestimentum. However, molecular data could not distinguish them as separate species. We suggest that the lack of an axial rod reflects predation. Biometrical data indicate a discontinuous recruitment period, as is known for other vestimentiferan species. Sex ratios are balanced, but females tend to be larger than males. We hypothesize that the males grow more slowly or die younger than the females.
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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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.013 | 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".