North American Stygobiontic Diving Beetles (Coleoptera: Dytiscidae: Hydroporinae) with Description of Ereboporus naturaconservatus Miller, Gibson and Alarie, New Genus and Species, from Texas, U.S.A
Bibliographic record
Abstract
Ereboporus naturaconservatus Miller, Gibson and Alarie, new genus and new species (Coleoptera: Dytiscidae) is described from specimens collected from Caroline Springs, Independence Creek, Terrel County, Texas, U.S.A. Specimens were collected using drift nets placed at the head of the spring, suggesting the species is subterranean and occurs in nearby areas of the Edwards-Trinity Aquifer. In addition, the new taxon is characteristic of subterranean diving beetles in having adults depigmented, relatively soft, and lacking metathoracic wings and compound eyes. In addition, the taxon is diagnosed among all adult Dytiscidae in having: 1) the head extremely large relative to the rest of the body, 2) the pronotum short and cordate; 3) the prosternal process small, short and not extending to the mesosternum; 4) the elytra fused along the suture; 5) the elytron and elytral epipleuron extending ventromedially, concealing large lateral portions of the abdominal sterna; 6) the female internal genitalia with a large, elongate, ring-shaped structure on the bursa. The species is placed in the tribe Hydroporini (Hydroporinae) based on the character states: 1) pro- and mesotarsi pseudotetramerous; 2) male genitalia bilaterally symmetrical; 3) scutellum not visible with the elytra closed; 4) prosternum in lateral aspect declivous; 5) metatarsal claws the same length; 6) apices of elytra evenly rounded; 7) metepisternum extending to mesocoxal cavity externally; 8) male lateral lobe with one segment; 9) metacoxal process with well-developed lobes; 10) anterior margin of metafemur distinctly separated from the lobes of the metacoxal process. Three additional subterranean species are known from North America, Comaldessus stygius Spangler and Barr, 1995, Stygoporus oregonensis Larson and Labonte, 1994, and Haideoporus texanus Young and Longley, 1976. Each of these species is figured and discussed.
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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 | 0.001 | 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) | 0.004 | 0.001 |
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".