KMS Nanjing Institute of Geology and Palaeonotology,CAS
RUDISTS OF TIBET AND THE TARIM BASIN, CHINA: SIGNIFICANCE TO REQUIENIIDAE PHYLOGENY | |
Scott, Robert W.1; Wan, Xiaqia2; Sha, Jingeng (沙金庚)3; Wen, Shi-Xuan (文世宣)3 | |
2010-05-01 | |
发表期刊 | JOURNAL OF PALEONTOLOGY |
ISSN | 0022-3360 |
卷号 | 84期号:3页码:444-465 |
摘要 | Rudists are a principal biotic component of Cretaceous carbonates in Tibet and in the Western Tarim Basin. Barremian to Maastrichtian carbonate units are widespread on the northern margin of the Indian Plate and in Tethyan tectonic slices that were welded onto Eurasia in successive stages during the Late Cretaceous and Paleogene. In far northwestern Tibet, Barremian-Cenomanian endemic rudists and cosmopolitan orbitolinid foraminifera occupied isolated carbonate platforms in the eastern Tethys. Rudists, corals, and stromatoporoids composed bioherms up to 10 m thick and several kilometers in lateral extent. A unique endemic requieniid rudist, Rutonia, is compared to morphologically similar but older, less derived genera. Associated specimens in this assemblage are indeterminate requieniid valves, monopleurids, and two genera with three radiolitid species that are re-described and taxonomic positions re-evaluated. In southern Tibet, mainly endemic Campanian-Maastrichtian radiolitid rudists and cosmopolitan larger benthic foraminifera contributed to carbonate shelves on the northern Indian Plate near the Cretaceous equator. In the Western Tarim Basin Cenomanian strata yield Tethyan rudist species. Coiling morphometric analysis using the three-dimensional morphology Raup diagram shows that Requieniidae valves in contact with the substrate are convergent with the basic gastropod shell. More derived strongly coiled, younger requieniids were adapted to encrusting or semi-infaunal habits. Stratigraphic analysis confirms that Requieniidae diversity crises coincided with Cretaceous oceanic anoxic events Two end members of valve geometry each appear to be primitive and derived characters respectively and separate the family Requieniidae into two clades that are here recognized as two new subfamilies. The end members are defined by the coiling geometry, whether the spire is close to the plane of commissure or it is translated along the coiling axis and by myophore structures. The older matheroniform clade has a low spirogyrate LV that is translated slightly from the commissure along the coiling axis; this group is composed of Matheronia (and its subgenus Monnieria), Hypelasma, Lovetchenia, Rutonia, and Kugleria. Genera in the younger clade have a tall trochospiral LV that is translated along the coiling axis and consists of Requienia, Toucasia, Pseudotoucasia, Apricardia, Bayleoidea, and Bayleia. Claditics support these relationships. |
语种 | 英语 |
关键词[WOS] | Paleobiogeographic Aspects ; Southern Tibet ; Bivalves ; Evolution ; Plateau ; Hippuritacea ; Stratigraphy ; Collision ; Strata ; Area |
资助项目 | National Project 973 of China[2006CB701403] ; National Natural Science Foundation of China[40672020] ; National Science Foundation of China[40872013] ; China University of Geosciences Beijing (CUGB) |
WOS研究方向 | Paleontology |
WOS类目 | Paleontology |
WOS记录号 | WOS:000277664500004 |
项目资助者 | National Project 973 of China ; National Natural Science Foundation of China ; National Science Foundation of China ; China University of Geosciences Beijing (CUGB) |
出版者 | PALEONTOLOGICAL SOC INC |
文献类型 | 期刊论文 |
条目标识符 | http://ir.nigpas.ac.cn/handle/332004/371 |
专题 | 中国科学院南京地质古生物研究所 其他 |
通讯作者 | Scott, Robert W. |
作者单位 | 1.Univ Tulsa, Dept Geosci, Tulsa, OK 74104 USA 2.China Univ Geosci, Beijing, Peoples R China 3.Chinese Acad Sci, Nanjing Inst Geol & Paleontol, LPS, Nanjing, Peoples R China |
推荐引用方式 GB/T 7714 | Scott, Robert W.,Wan, Xiaqia,Sha, Jingeng ,et al. RUDISTS OF TIBET AND THE TARIM BASIN, CHINA: SIGNIFICANCE TO REQUIENIIDAE PHYLOGENY[J]. JOURNAL OF PALEONTOLOGY,2010,84(3):444-465. |
APA | Scott, Robert W.,Wan, Xiaqia,Sha, Jingeng ,&Wen, Shi-Xuan .(2010).RUDISTS OF TIBET AND THE TARIM BASIN, CHINA: SIGNIFICANCE TO REQUIENIIDAE PHYLOGENY.JOURNAL OF PALEONTOLOGY,84(3),444-465. |
MLA | Scott, Robert W.,et al."RUDISTS OF TIBET AND THE TARIM BASIN, CHINA: SIGNIFICANCE TO REQUIENIIDAE PHYLOGENY".JOURNAL OF PALEONTOLOGY 84.3(2010):444-465. |
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