Bibliographic record
Abstract
Dallithyris dubia Cooper, 1981 (Fig. 7; Table 5) Dallithyris ? dubia Cooper, 1981a: 21, 22, pl. 4, figs 21-29. — Zezina 1985: 149; 2010: 1184. MATERIAL EXAMINED. — Mozambique Channel. MAINBAZA, stn CP 3138, 7 bivalved specimens, 1 dorsal valve. — Stn CP 3141, 34 bivalved specimens, 2 ventral valves, 1 dorsal valve. DEPTH RANGE. — 684- 707 m. MEASUREMENTS. — See Table 5. DESCRIPTION Shell of medium size (maximum length of 21.9 mm), thin, elongate oval to subtriangular in outline, ventribiconvex. Shell surface smooth with numerous, distinct growth lines. Beak suberect, foramen large, circular, permesothyrid. Symphytium small, slightly concave, partially visible. Anterior commissure rectimarginate to incipiently uniplicate. Ventral valve interior (Fig. 7F) with small teeth and short, excavate pedicle collar. Dorsal valve interior with long inner socket ridges and triangular and distinct cardinal process (Fig. 7H, I). Outer hinge plates relatively narrow, concave. Loop short with a broad transverse band angularly folded (Fig. 7 G-I). REMARKS The genus Dallithyris, with type species D. murrayi, was first established by Muir-Wood in 1959 from specimens obtained from the Maldive Islands and Saya de Malha Bank in the Indian Ocean. Later Cooper (1981a) questionably assigned four specimens from Samper Bank to Dallithyris, recognizing the uncertainty of the loop characteristics of the type species. We assign our specimens to Dallithyris notwithstanding, based on the similarity of the loop in Fig. 7H, I to that illustrated by Cooper in his plate 4, fig. 28. Apart from the type of loop, the beak character supports assignment of D. dubia to the genus Dallithyris. In Stenosarina Cooper, 1977 the beak is nearly straight, whereas in Kanakythyris Laurin, 1997 it is incurved with a very small foramen (Laurin 1997; Bitner 2009). Dallithyris dubia differs from its congeneric species in being much smaller (see Muir-Wood 1959; Cooper 1983; Bitner 2006b, 2007, 2008, 2014). D. dubia was found only in the Mozambique Channel in our study, where it is relatively common.
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.015 | 0.004 |
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".