Coronatella (Coronatella) circumfimbriata
Bibliographic record
Abstract
Coronatella (Coronatella) circumfimbriata (Megard, 1967) Figs (9A-H). Megard, 1967: 37-40, Fig. 1-7, Pl. I, Fig. 1-6 (Alona); Smirnov, 1971: 359, Fig. 414 (Alona); Sinev, 2009: 65-70, Fig. 4-5 (Alona); Sinev & Silva-Briano, 2012: 20, Fig. 11A-D. Type locality. Lake Itasca, Clearwater County, Minnesota, U.S.A. Type material. Holotype. Female, The Natural History Museum, London, U.K., 1966.3.21.3. Material examined here. Over 100 parthenogenetic females from pond #9, North Dog Leg, Texas State University Campus, San Marcos, Texas, USA, 15.02.1978, coll. S. Sisson, DGF-4492; over 40 parthenogenetic females, 4 males from pond at south side of Federal Road 1, 5 miles West from Wiscasset, Maine, USA, 4.09.1981, coll. D. B. Berner, DGF-6224. Material studied earlier. See list of material in Sinev (2009) and Sinev & Silva-Briano (2012). Morphology of studied females agrees with the earlier descriptions of the species (Megard 1967; Sinev 2009). Rudimentary seta 1 on IDL of limb I and additional seta near scraper 1 of limb II (Fig. 9C) was found in both studied populations. Redescription. Male. Redescription of male morphology by Sinev (2009) was based on a single specimen from slide from D.G. Frey collection, so new description of male, based on more abundant material, is provided. General. Body (Fig. 6L) low oval, maximum height at the middle of the body, height/length ratio about 0.55. Ocellus two times smaller than eye. Postabdomen (Fig. 6M) short, evenly narrowing distally along all length, with broadly rounded dorso-distal angle. Ventro-distal angle well-defined, obtuse. Sperm duct openings located ventrally almost at the end of posta- bdomen. Preanal angle well-defined; postanal angle weakly defined. Distal part of postabdomen 1.5 times longer than preanal; anal portion 1.5 times longer than postanal one. Clusters of short setulae in place of marginal denticles; lateral fascicles of setulae same as in female. Postabdominal claw 1.5 times shorter than preanal portion of postabdomen, with five-six moderately thick spines on the inner side. Basal spine long, about 0.25-0.5 length of claw. Antennule (Fig. 6O) thicker than in female, with 10 terminal and 2 lateral aesthetascs. Longest terminal aestetascs as long as antennules itself; lateral aestetascs about 2/3 length of antennule. Male seta arising at 3/4 length from tip, about 1/4 of antennule length. Thoracic limb I (Fig. 8 G-H) with short U-shaped copulatory hook 2 times shorter than limb itself. Copulatory brush present; copulatory brush seta very short. Ventral face of limb below them with double row of short thick setulae. Inner distal lobe without seta 1; setae 2 and 3 shorter and thinner than in female, armed with moderately thick spinules; male seta curved, shorter than seta 2. Taxonomic notes. Morphology of studied males agrees well with initial description of Megard (1967). Male studied by Sinev (2009) was labelled as Alona circumfimbriata by D.G. Frey, it has similar habitus and limb I morphology, but differ from studied here in morphology of postabdominal claw, with long curved basal spine, more similar to that of C. (C.) poppei (see Sousa et al. 2015 for comparison). It is unclear if Sinev (2009) deal with either abnormal specimen or with male of some other Coronatella (Coronatella) species. Distribution: Canada, USA, North and Central Mexico (Sinev 2009; Sinev & Silva-Briano 2012).
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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 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.007 | 0.002 |
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".