A morphological examination of <i>Frustulia</i> (Bacillariophyceae) from the Ocala National Forest, Florida, USA
Bibliographic record
Abstract
The genus Frustulia was found to be an abundant and important component of the attached algal community in a suite of dilute, poorly buffered, and acidic ponds situated in the Ocala National Forest in north-central Florida. Six species were found in the study, including Frustulia krammeri Lange-Bertalot & Metzeltin, Frustulia saxonica Raben horst, Frustulia crassinervia (Brébisson) Lange-Bertalot & Krammer, Frustulia pseudomagaliesmontana Camburn & Charles, Frustulia bahlsii Edlund & Brant, and a newly described taxon, Frustulia trochus Siver & Baskette sp. nov. In addition, an emended description is provided for F. pseudomagaliesmontana. Each species was studied in detail with both light and scanning electron microscopy, and the importance of specific morphological characters was also examined with principal components analysis. In addition to valve shape and size, striae density and areolae density, the structure of the helictoglossae, raphe fissures, and areolae were all found to be useful and important characters in distinguishing among species. Three distinct types of helictoglossae, referred to as linear, rolled tongue, and hoop shaped, are discussed. Taxa with linear or rolled-tongue-shaped helictoglossae also had T-shaped raphe fissures and circular hymen coverings. Taxa with hoop-shaped helictoglossae had teardrop-shaped raphe fissures and rectangular hymen coverings. K-cluster analysis was used to examine the distinction between F. krammeri and F. saxonica relative to the historical separation of F. rhomboides from F. saxonica.Key words: acidic ponds, Florida, Frustulia, Frustulia trochus, new species, Ocala National Forest.
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.
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 | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| 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".