EARLY EVOLUTION OF THE CRETACEOUS SERIAL PLANKTIC FORAMINIFERA (LATE ALBIAN-CENOMANIAN)
Bibliographic record
Abstract
Research Article| October 01, 2009 EARLY EVOLUTION OF THE CRETACEOUS SERIAL PLANKTIC FORAMINIFERA (LATE ALBIAN–CENOMANIAN) Marius D. Georgescu; Marius D. Georgescu 3 1Geoscience, University of Calgary, 2500 University Drive N. W., Calgary, Alberta T2N 1N4, Canada 3Correspondence author. E-mail: dgeorge@ucalgary.ca Search for other works by this author on: GSW Google Scholar Brian T. Huber Brian T. Huber 2Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, 10th and Constitution Ave., Washington D.C., 20013-7012, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Marius D. Georgescu 3 1Geoscience, University of Calgary, 2500 University Drive N. W., Calgary, Alberta T2N 1N4, Canada Brian T. Huber 2Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, 10th and Constitution Ave., Washington D.C., 20013-7012, USA 3Correspondence author. E-mail: dgeorge@ucalgary.ca Publisher: Cushman Foundation for Foraminiferal Research Received: 20 Jan 2009 Accepted: 23 Jul 2009 First Online: 03 Mar 2017 Online ISSN: 1943-264X Print ISSN: 0096-1191 © 2009 Journal of Foraminiferal Research Journal of Foraminiferal Research (2009) 39 (4): 335–360. https://doi.org/10.2113/gsjfr.39.4.335 Article history Received: 20 Jan 2009 Accepted: 23 Jul 2009 First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Marius D. Georgescu, Brian T. Huber; EARLY EVOLUTION OF THE CRETACEOUS SERIAL PLANKTIC FORAMINIFERA (LATE ALBIAN–CENOMANIAN). Journal of Foraminiferal Research 2009;; 39 (4): 335–360. doi: https://doi.org/10.2113/gsjfr.39.4.335 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyJournal of Foraminiferal Research Search Advanced Search Abstract The classification of the late Albian–Cenomanian biserial planktic foraminiferal family Heterohelicidae Cushman, 1927, is reevaluated. This group underwent a period of relatively slow evolutionary change during the late Albian–early Cenomanian followed by rapid evolution in the middle Cenomanian. Three new heterohelicid genera and species in the late Albian–early Turonian are described: Protoheterohelix obscura, Planoheterohelix postmoremani, and Globoheterohelix paraglobulosa. Two reassigned species are also emended: Protoheterohelix washitensis (Tappan) and Planoheterohelix moremani (Cushman). Reassessment of the taxonomic significance of morphological features of the heterohelicid test leads to the conclusion that the most important characters in their taxonomy are test architecture, symmetry/asymmetry of the periapertural structures, nature of periapertural structures, relative size difference of the proloculus and second chamber, test ornamentation, and pore size. Most heterohelicid taxa of the late Albian–Cenomanian display microperforate test walls. HeterohelixEhrenberg, 1843, which evolved in the early Turonian, is a distinct lineage. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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 distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.006 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.002 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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 teacher head, 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".