Eleven new heteroscleromorph Demospongiae (Porifera), and a new record of the tetractinellid Ancorina corticata, from Walters Shoal, a shallow seamount on the Madagascar Ridge in the South West Indian Ocean (SWIO)
Bibliographic record
Abstract
Walters Shoal is a shallow seamount located on the South Madagascar Ridge, which is situated approximately 833 km south of Madagascar and 1,296 km east of South Africa. Even though it penetrates the euphotic zone (summit is 15 m below the sea surface) and is protected by the Southern Indian Ocean Deep-Sea Fishers Association, there is a paucity of biodiversity and oceanographic data. Thus, a multidisciplinary cruise was initiated in May 2014 on the FRS Algoa as a component of the African Coelacanth Ecosystem Programme (III). This paper reports on 11 new heteroscleromorph Demospongiae collected from Walters Shoal, namely Chelotropella alexrogersi sp. nov., Penares waltershoalensis sp. nov., Tethya muricyi sp. nov., Agelas kellyae sp. nov., Ptilocaulis ramosus sp. nov., Halichondria (Halichondria) madagascarensis sp. nov., Aaptos incrustans sp. nov., Lissodendoryx (Lissodendoryx) ingolei sp. nov., Fibulia punicea sp. nov., Clathria (Clathria) flo sp. nov. and Callyspongia (Callyspongia) cacumen sp. nov. Additionally, a range extension of Ancorina corticata Lévi, 1964, is reported. The sponge assemblage had high levels of endemism with several species shared by both the western and eastern flanks of the seamount. In contrast, sponge assemblages differed significantly according to depth, with the mesophotic zone (31-150 m) acting as a transition between the shallow (15-30 m) and submesophotic (> 150 m) zones. Species richness and the number of new species were highest in the submesophotic zone.
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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 | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| 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 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".