Arrhinoceratops brachyops Parks 1925
Bibliographic record
Abstract
ARRHINOCERATOPS BRACHYOPS PARKS, 1925 Holotype specimen: ROM 796, complete skull lacking lower jaws. Holotype locality and horizon: Five kilometres upstream of Bleriot Ferry, along the Red Deer River, Alberta. ROM 796 is from between the no. 8 and no. 10 coal seams, below the DMT, and within a narrow stratigraphic range spanning the upper half of the Horsethief Member to the lower half of the Morrin Member of the Horseshoe Canyon Formation (Mallon et al., 2014). Referred specimens: CMN 8882, partial skull of a juvenile, including dentaries with prominent lateral ridge; ROM 1439, an almost complete skull with lower jaws, syncervical and left forelimb elements (scapula, humerus, radius, metacarpals and several phalanges); CMN 56500 (field #WL 123), nasal horncore with triangular transverse cross section. Tentatively referred specimens: TMP 1981.048.0006, partial frill with low, blunt epi-ossifications. Distribution: From the upper Horsethief Member through the Morrin Member up to the DMT of the Horseshoe Canyon Formation, Alberta, Canada (sensu Eberth & Braman, 2012). TMP 1981.048.0006 is from the Horseshoe Canyon Formation (unknown horizon) near Devon, Alberta (Tanke, 1984). Age: The base of the Horseshoe Canyon Formation near Drumheller has been assigned an age of approximately 72.5 Ma (Eberth & Braman, 2012; Eberth et al., 2013). The younger DMT in the middle of the formation lies just above the inferred position of the Campanian– Maastrichtian boundary (Eberth & Braman, 2012, fig. 4), with an accepted age of 70.6 Ma (see discussion in Eberth & Braman, 2012; Eberth et al., 2013). The stratigraphic interval that extends upwards from the base of the formation to the DMT is approximately 165 m thick (Eberth & Braman, 2012: fig. 4), and suggests a rate of sedimentation of 8.7 cm kyr –1. Identifiable Arrhinoceratops remains are known to occur through a stratigraphic interval of 75 m that extends down section from the base of the DMT (Eberth et al., 2013). This suggests a temporal range of approximately 860 kyr for that taxon in the region, between 71.5 and 70.6 Ma. DESCRIPTION OF CMN 8882 As reconstructed (Fig. 1), the skull has a basal length (rostral to occipital condyle) of approximately 465 mm, and is 900 mm in total length. Other relevant measurements are provided in Table 1.
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) | 0.000 | 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 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.010 | 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".