Sclerocoelus rostrum Kuwahara, Marshall & Paiero, 2025, sp. nov.
Bibliographic record
Abstract
Sclerocoelus rostrum sp. nov. urn:lsid:zoobank.org:act: 631F57AF-83C7-4E58-8BFC-FE9533B43378 Figs 131–132 Etymology This name refers to the beak-like surstylus and triangular subcercus (from the Latin ‘ rostrum ’, meaning ‘beak, bill, snout’). Material examined Holotype MEXICO • ♂; Hidalgo, 5 km N of Zicualtipán, Highway 105; 2500 m a.s.l.; 23 Jun. 1986; M. Sörensson and B. Mårtensson leg.; MZLU. Description BODY (Fig. 131A). Length 2.5 mm. Head dark brown, lower third of frons orange; face, gena, and antennae orange-brown. Frontal width 2.2× frontal height. Three pairs of strong interfrontal bristles surmounting a very fine fourth pair; anterior orbital 0.6–0.7× length of posterior. Palpus brown. Eye large, greatest height about 4.0× shortest genal height. Thorax dark brown, scutum with paler lateral edges. Two pairs of dorsocentral bristles (anterior pair distinct, 0.4× length of posterior pair) separated by 8–9 rows of acrostichal setulae. Membrane around prosternum bare. Legs brown, fore and hind femora darker. Fore femur with three large ventral preapical setae. Ventral surface of male mid tibia with two rows of stout setae in apical half. Wing slightly infuscate. CS2 0.8× CS3. Halter pale brown. MALE ABDOMEN (Figs 131B–C, 132). Dark brown, posterior edges of tergites slightly desclerotized. T2–5 and S2–4 uniformly long-setose with large posterolateral setae. S5 rectangular, 2.0× length of S4, sparsely setose with large, dark, rectangular, slightly bulging posteromedial patch of dense setulae flanked by pale setose areas. Anterior flange of S6+7 very large, 1.2 × as long as wide, extending to anterior margin of S4. Sclerite A dark, unmodified; sclerite B thin, arched; sclerite C reduced, indistinct; sclerite D dark, broad, arising from left side of posteromedial process of S5; sclerite E dark, elongate; sclerite F large, subtriangular with a narrow apicoventral process on left side; sclerite G dark, club-shaped, fused to anterior edge of sclerite F; ring sclerite well sclerotized, outer side much thicker than inner side, and with a short posteroventral lobe. Epandrium large, 0.8× length of S8, height 1.7× maximum length and 0.8× maximum width, uniformly setose; perianal pads weakly developed but setulose. Pseudocercus well developed, narrowly fused with posteroventral corners of epandrium, and bearing three setae; halves of subepandrial sclerite broad, very strongly arched, expanded and broadly fused medially. Subcercus projecting posteriorly, elongate, apically flattened and twisted, anteriorly with a short, dark, basal lobe. Hypandrium with thick, laterally flattened, Y-shaped anteromedial apodeme. Surstylus large, subtriangular, apex slightly curled ventrally, outer surface setose, inner surface with a dark anterodorsal lobe. Postgonite long, mushroom-shaped, greatly expanded anteriorly and posteriorly in distal half, posteroventrally striate and curled laterally. Phallapodeme very large, dark, apex dorsoventrally flattened; basiphallus small with a short, triangular epiphallus; distiphallus large, with a short, heavily sclerotized dorsal sclerite and a pair of long, heavily sclerotized, J-shaped ventrolateral sclerites. FEMALE ABDOMEN. Female unknown. Distribution Neotropical: Mexico. Remarks Sclerocoelus rostrum sp. nov. is known from only a single male specimen that differs from all congeners in having a triangular, beak-like surstylus, large, triangular subcercus, postgonite broadly expanded apically, and S5 with a stout posteromedial patch of dense setae. It is one of eight congeners found in Mexico, and one of two known only from Mexico.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.003 | 0.002 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.011 | 0.005 |
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".