Cactophagus silron Anderson, new species
Bibliographic record
Abstract
Cactophagus silron Anderson, new species (Figs. 3536, 4245) Identification.—This very distinctive species is easily recognized by its small size (<7 mm in length), uniform greyblack color (Figs. 3536), somewhat oblique form of the antennal club with only a narrow apical pilose part (Fig. 43), and most significantly, the broadly expanded and keeled hind tibiae (Fig. 44). Among Cactophagus it is most closely related to Cactophagus strigosus (Erichson), C. rubricatus Hustache and C. limulus (Vaurie), based on the asymmetrical form of the antennal club. Description.— Male, length 6.7 mm; width 2.6 mm. Female, not known. Color greyblack with only humeri pale orange. Pronotum with pair of darker velvety black slightly curved paramedial lines. Rostrum slightly longer than length pronotum; elongate, narrow, cylindrical, slightly evenly curved, virtually impunctate except for scattered minute punctures in basal onehalf; base of rostrum slightly expanded, basal expanded area very short, about onefifth total rostral length. Rostrum glabrous ventrally; peduncle flat, bilamellate anteriorly. Scrobe with posterior margin about onehalf width of base of scape from anterior margin of eyes. Antenna with scape about onehalf length rostrum; club slightly laterally compressed, asymetrical, with form oblique with inner margin slightly shorter than outer margin; apical pilose part visible as a narrow oblique line. Pronotum with lateral margins slightly convergent in basal onehalf, moderately convergent to apex; very sparsely and very shallowly punctate on disc, flanks with punctures slightly deeper; flat subbasally. Pronotum with length greater than width. Elytra about one and onehalf times length of pronotum; intervals impunctate, flat; intervals 2 and 3 curved inwardly at base, intervals 4 and 5 wider at base, interval 6 constricted subbasally; striae punctate, shallowly impressed. Scutellum elongate “V” shaped, length two and onehalf times width at base, slightly swollen towards apex. Pygidium sparsely but deeply punctate throughout, with apical onehalf tumescent, acutely carinate and setose along midline; lateral and apical margins finely, sparsely setose; apex narrowly rounded. Ventrally with front coxae separated by about onequarter width of coxa; prosternum flat between and anterior to front coxae. Meso and metasterna and ventrites sparsely shallowly punctate (less so medially); last ventrite of male deeply sparsely punctate apically at middle. Legs finely and shallowly punctate; femora slightly clavate, hind femur almost reaching apex of ventrite 5; inner margins of femora glabrous, of all tibiae with only very short, dense setae arranged in pectinate manner; hind tibiae markedly expanded and keeled along outer margin, middle and front tibiae slightly inwardly arcuate. Tarsi each with third article slightly dilated, pilose ventrally except for extreme base at middle; third articles of all tarsi symmetrical; apical margin of third articles slightly produced, rounded. Material Examined.—Male HOLOTYPE labelled " July 6, 1957 / Golfito, Costa Rica / Truxal & Menke (CMNC; in exchange from LACM). Distribution.— Costa Rica (Puntarenas). Natural history.—No information is available about the natural history of this species. Derivation of specific name.— Through their support of the Nature Discovery Fund at the Canadian Museum of Nature, this species is named after Silvana and Ron Macdonald of Toronto, Ontario, Canada.
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) | 0.001 | 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 | 0.000 |
| Insufficient payload (model declined to judge) | 0.011 | 0.003 |
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".