Preliminary DNA Barcode Report on the Marine Red Algae (Rhodophyta) from the British Overseas Territory of Tristan da Cunha
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Bibliographic record
Abstract
The current manuscript is the first in a series intended to publish accumulating DNA barcode data to make them accessible to the scientific community. Focused on 135 specimens of red algae from the remote islands of Tristan da Cunha, part of the British Overseas Territory of Saint Helena, Ascension and Tristan da Cunha, the 47 (possibly 48; see notes with Lophurella sp. 1Tris) genetic groups uncovered during this project are compared to the only detailed floristic work for this region completed by Baardseth in 1941. A number of taxonomic anomalies are reported with indications for eventual solutions that await study of the type material of the associated morphospecies. Species previously assigned by Baardseth to the genus Epymenia Kützing are formally transferred to Rhodymenia Greville as R. elongata (Baardseth), comb. nov., (including E. marginifera Baardseth) and R. flabellata (Baardseth), comb. nov. A number of range extensions are reported including species such as Ceramium secundatum (Lyngbye) C.Agardh, Colaconema caespitosum (J.Agardh) Jackelman, Stegenga & J.J.Bolton, Helminthocladia calvadosii (J.V.Lamour. ex Duby) Setch. and Porphyra mumfordii S.C.Lindstrom & K.M.Cole, which have likely been distributed by human activities. We also note that the sporophyte of the supposedly narrowly distributed Schimmelmannia elegans has been collected from both British Columbia, Canada, and Queensland, Australia, consistent with other observations that sporophytes of red algal species with alternations of heteromorphic generations are commonly more broadly distributed than the gametophytic stage. This species, although originally described by Baardseth from these mid Atlantic islands, may also be introduced.
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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) | 0.007 | 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 it