Bibliographic record
Abstract
Chitonaster johannae Koehler, 1908 FIGURE 5A–D Chitonaster Johannae Koehler, 1907: 144; 1908: 542; A.M. Clark, 1993: 250; Mah 2011: 15. Diagnosis Body form stellate (R/r=2.0–2.6) with arms elongate. Disk swollen, convex. Interradial arcs rounded. Abactinal plates scalar, flattened, overlapping over one another forming mosaic-like pattern. Each plate with spines, one to three, short, blunt, cylindrical and densely clustered on each abactinal plate. Other than short spines, bivalve pedicellariae are the only primary structures present on abactinal surface, usually only on disk rather than on arms. Papulae absent. Marginal plates, 24–36 per interradius, each with blunt cylindrical spines, 2 to 4 in linear series across plate surface. Other accessories absent from plate surface. Actinal region with small thorny spinelets, 1 to 2. Each interradius with large bivalve or trivalve pedicellariae, 1 to 4, similar to those on the abactinal surface. Furrow spines 2, slender, cylindrical, but round in cross-section. Single subambulacral spine present. Comments Pedicellariae are variable in this species (Fig. 5C–D), those of USNM 1018953 (at R=2.3) were relatively elongate relative to adjacent plates, approximately 2 to 3X the length of the adjacent plates whereas those on USNM E13501 (at R=3.3) were of half the length, and approximately 1X the length of adjacent plates. Distribution/Occurrence South Atlantic-Scotia Sea region near South Georgia / South Orkney Islands. 2856–4204 m. Material Examined USNM E13501. South of South Georgia, South Atlantic Ocean. -56.875 -37.542, 3138–3144.0 m. Coll. R / V Eltanin, 2 dry specs. R =2.9, r=1.2; R =3.3, r=1.3. USNM 1018875 South of Burdwood Bank, Argentina, Scotia Sea, -55.025 -58.817, 2782–2891 m. Coll. University of Southern California, R / V Eltanin 4 Dec 1962, 1 dry spec. R =2.3 r=0.8. USNM 1018953 South of South Orkney Islands, Weddell Sea. -63.408 -44.9, 3587–3660 m. coll. US Antarctic Research Program. 1 dry spec. R=2.3, r=1.1. USNM 1086359 Southern Ocean, Antarctica -66.358 -45.842, 4200–4204 m. Coll. U. Southern California. 1 dry spec. R=2.5, r=1.1.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.044 | 0.006 |
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 source (direct Gemma or distilled Codex), 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".