Atheta (Tetropla) tubericauda Bernhauer
Bibliographic record
Abstract
71. Atheta (Tetropla) tubericauda Bernhauer, new subgeneric combination Figs. 6a – d, Table 1 References. Bernhauer 1909. Distribution. Nearctic. Canada: not recorded. USA: MA, NH (NSR). This is the only record of this species from the USA besides the original record from Massachusetts (Bernhauer 1909). We have compared the NH specimen with male lectotype and they agree in external and genital morphology. The female of this species remains undescribed. The male illustrations are provided for the first time (Figs. 6 a-d). Collection and Habitat data. One specimen was collected from forest litter in October. Material. USA, New Hampshire, Strafford Co.: 4 mi SE Durham, Adams Point, 11.X.1981, D.S. Chandler, berlese forest litter, 1 male. Comments. This species is the most similar to Atheta (Tetropla) frosti Bernhauer. It is practically indistinguishable externally from A. frosti, but unlike that species male tergite VIII of A. tubericauda has three tuberculate small projections/teeth on the apical margin, two lateral and one median. In A. frosti the apical margin of male tergite VIII has two small, lateral angular projections/teeth and a sinuate margin between them (for illustration see Klimaszewski et al. 2018). The tubus of the median lobe of the aedeagus is differently shaped in the two species, being bent ventrad in A. tubericauda and bulbus bearing a narrow, spine-like frontal projection in lateral view which is missing in A. frosti. Originally A. tubericauda was described in the subgenus Atheta (s. str.), but it does not have the characteristics (larger body size, male tergite VIII without teeth, antennomeres V–X elongate or subquadrate in most, spermatheca with thin, long and irregularly twisted stem bearing small bud-shaped projections) of this subgenus. Atheta frosti (and A. tubericauda) is also similar externally to Atheta mcalpinei Klimaszewski and Webster, described from New Brunswick and originally assigned to the subgenus Dimetrota (Webster et al. 2016, Klimaszewski et al. 2018). It clearly shares the characteristics of the subgenus Tetropla, and is here officially transferred to this subgenus as Atheta (Tetropla) mcalpinei new combination. The differences between A. frosti and A. mcalpinei are in the shape of male tergite VIII, shape of apical part of tubus in lateral view (less curved ventrad in A. mcalpinei), and the more transverse antennae in the latter. Additional studies are needed to examine DNA and morphological variation of the two species to establish the status of the latter species.
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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) | 0.001 | 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 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.016 | 0.008 |
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".