Molecular phylogeny of the genus Themisto (Guérin, 1925) (Amphipoda: Hyperiidae) in the Northern Hemisphere
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
The Amphipoda is a highly speciose order of crustaceans with a life cycle characterized by direct development and no larval stage, making them interesting models for studies on marine speciation. The family Hyperiidae Dana, 1852 is a strictly pelagic group of Amphipoda. In northern latitudes, free-swimming hyperiids belonging to the genus Themisto (Guérin, 1825) are important components of marine ecosystems in term of abundance and biomass, but little is known about their genetic relationships. We present the first multi-locus molecular phylogenetic assessment of the Themisto in the Northern Hemisphere. We performed Bayesian and maximum likelihood reconstructions based on three nuclear loci (18S rDNA, 28S rDNA, and Histone 3) and mitochondrial cytochrome oxidase I data on eight specimens of Themisto from the Pacific, Arctic, and Atlantic oceans. We also provide an updated molecular phylogeny of Hyperiidae. Based on our multi-locus phylogeny, we report the presence of cryptic species in the North Pacific. Our results are discussed in the light of marine speciation.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.000 | 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