<i>Agraulos longicephalus</i> and <i>Proampyx</i>? <i>depressus </i>(Trilobita) from the Middle Cambrian of Bornholm, Denmark
Bibliographic record
Abstract
1 Agraulos longicephalus and Proampyx?depressus (Trilobita) from the Middle Cambrian of Bornholm So far, only cranidia of Agraulos have been found.Grönwall (1902) reported three cranidia of A. ceticephalus (Barrande 1846) and two cranidia of A. depressus Grönwall 1902 (here assigned to Proampyx?) from the Ptychagnostus punctuosus Zone at Borggård, Øleå (Fig. 2).Rudolph (1994) figured one cranidium of A. cf.ceticephalus (Barrande 1846) from the P. punctuosus Zone.There are two further cranidia assigned to A. ceticephalus (Barrande 1846) from the same zone in the collection of Buchholz (1997; personal communication 2010).All mentioned material of A. ceticephalus is here identified with A. longicephalus (Hicks 1872).This species strongly resembles A. ceticephalus which occurs in strata of similar age in the Czech Republic (Šnajdr 1958) and eastern Newfoundland, Avalonian Canada (Fletcher et al. 2005), and the only conspicuous difference is the outline of the occipital ring (see below).About 25 additional cranidia of A. longicephalus were collected during the years 2004-2007 from the older Acidusus atavus Zone at Borggård (for details, see The trilobite family Agraulidae is in Scandinavia represented by the genera Proampyx Frech 1897 and Agraulos Hawle & Corda 1847.Proampyx is common and widespread and includes the five species P. difformis (Angelin 1851), P. aculeatus (Angelin 1851), P. acuminatus (Angelin 1851), P. anceps (Westergård 1953), and P. cornutus Buchholz 1997, all occurring in the Middle Cambrian Paradoxides forchhammeri Superzone of Norway, Denmark and Sweden (Brøgger 1878; Grönwall 1902; Westergård 1953) (Fig. 1).Various species have also been reported from glacial erratic boulders of northern Germany (Rudolph 1994;Buchholz 1997).Representatives of Agraulos Hawle & Corda 1847 are, on the other hand, rare in Scandinavia and have been recorded solely from Bornholm, Denmark, and from glacial erratic boulders of northern Germany (Grönwall 1902;Rudolph 1994;Buchholz 1997; Weidner & Nielsen 2014).The latter contain a fauna showing that they likely derive from the Bornholm area. Agraulos longicephalus and Proampyx? depressus (Trilobita) from the Middle Cambrian of Bornholm, Denmark
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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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".