A New Species of Asplenium L. from the Lower Cretaceous Changcai Formation in Yanbian Area, Jilin, China
Bibliographic record
Abstract
The living family of Aspleniaceae might be one of the biggest families of ferns.The Genus among it is diversified and widely distributed in tropical-temperate zones,especially in the tropical and subtropical areas which is recognized as the distribution center.Confessed earliest fossil specimens of Asplenium Linn.were found from Lower Cretaceous of Northeast Asia and Far East of Russia,being one of the new elements in Cretaceous in the Siberian-Canadian Phyto-geographic Realm.Based on the comparative studies of in situ spores between the fertile frond fossils collected from the early Cretaceous Changcai Formation in Yanbian area of Jilin,China,and the living fertile fronds of Asplenium trichomanes L.,the fertile frond fossils and its sterile frond fossils are definitely assigned to the genus Asplenium L.Furthermore,through the comparison to the known species of fossil Asplenium,a new species of Asplenium is recongnized,i.e.Asplenium changcaium Sun et Liu,sp.nov.Since the well preserved spores in situ of the present new species,it would be beneficial for the researches on the evolution of Asplenium,or even Aspleniaceae.The new species is described as follows:Order:Filicales;Family:Aspleniacea;Genus:Asplenium Linn.,1753;Species:Asplenium changcaium Sun et Liu,sp.nov.(Fig.2-1～8,Fig.3-1～7)Holotype:The specimen JLC030344 illustrated on Fig.2-1 has been chosen as holotype.Paratype:Both the specimen JLC030359 illustrated on Fig.2-5 and the specimen JLC030447 illustrated on Fig.2-7 are chosen as paratypes.Additional specimen:JLC030343,JLC030345,JLC030346,JLC030348,JLC030442,JLC030358,JLC030356,JLC030443,JLC030353.Repository:the Research Center of Paleontology and Stratigraphy,Jilin University,China.Type locality:Nanyang Coal-mine,Helong County,Jilin Province.Type horizon:Changcai Formation,Lower Cretaceous(Aptian).Etymology:Changcai refers to the stratigraphic horizon,the Lower Cretaceous Changcai Formation in Yanbian area,Jilin Province.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".