The acritarch genus Veryhachium Deunff 1954: Taxonomic evaluation and first appearance
Servais, Thomas1; Vecoli, Marco1; Li, Jun (李军)2; Molyneux, Stewart G.3; Raevskaya, Elena G.4; Rubinstein, Claudia V.5
2007
发表期刊PALYNOLOGY
ISSN0191-6122
卷号31页码:191-203
摘要

Veryhachium Deunff 1954, originally described from the Ordovician of western France, is one of the most frequently recorded acritarch genera. Over 250 species and subspecies, from the Cambrian to the Neogene, have been attributed to the genus. This genus has a simple morphology; it displays a triangular, rectangular, or polygonal central vesicle, with a few, simple processes drawn out from the angles of the vesicle in a single plane, and sometimes with supplementary or auxillary processes arising from the vesicle body. Veryhachium has been emended and revised numerous times. The number of valid species is excessive: most are probably synonyms. To facilitate effective classification, only a few morphological categories should be retained. For the Lower Paleozoic, the use of two informal groups is proposed. These are the Veryhachium trispinosum group for triangular specimens, and the Veryhachium lairdii group for rectangular forms. Although generally abundant and widespread throughout the Phanerozoic, Veryhachium is of limited biostratigraphic, paleoecologic, or paleogeographic value. However, its First Appearance Datum (FAD) is of great importance for Ordovician stratigraphy; the first Veryhachiirm morphotypes appear in the Tremadocian Stage, making the genus an important biostratigraphic marker.

关键词Ordovician Tremadocian Acritarchs Organic-walled Microphytoplankton Taxonomy Biostratigraphy
语种英语
关键词[WOS]Organic-walled Microphytoplankton ; Ordovician Acritarchs ; Cambrian-ordovician ; Middle Ordovician ; Stavelot Inlier ; Algerian-sahara ; Stancliffe 1994 ; South China ; Ne-germany ; Assemblage
WOS研究方向Plant Sciences ; Paleontology
WOS类目Plant Sciences ; Paleontology
WOS记录号WOS:000252435100016
出版者TAYLOR & FRANCIS INC
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/98
专题中国科学院南京地质古生物研究所
其他
通讯作者Servais, Thomas
作者单位1.Univ Sci & Technol Lille, CNRS, UMR 8014, Lab Paleontol & Paleogeog Paleozo, F-59655 Villeneuve Dascq, France
2.Chinese Acad Sci, Nanjing Inst Geol & Paleontol, Nanjing 210008, Peoples R China
3.British Geol Survey, Kingsley Dunham Ctr, Keyworth NG12 5GG, Notts, England
4.Russian Acad Sci, Inst Precambrian Geol & Geochronol, St Petersburg 199034, Russia
5.Consejo Nacl Invest Cient & Tecn, Unidad Palaeopalinol, IANIGLA, CRICYT, RA-5500 Mendoza, Argentina
推荐引用方式
GB/T 7714
Servais, Thomas,Vecoli, Marco,Li, Jun ,et al. The acritarch genus Veryhachium Deunff 1954: Taxonomic evaluation and first appearance[J]. PALYNOLOGY,2007,31:191-203.
APA Servais, Thomas,Vecoli, Marco,Li, Jun ,Molyneux, Stewart G.,Raevskaya, Elena G.,&Rubinstein, Claudia V..(2007).The acritarch genus Veryhachium Deunff 1954: Taxonomic evaluation and first appearance.PALYNOLOGY,31,191-203.
MLA Servais, Thomas,et al."The acritarch genus Veryhachium Deunff 1954: Taxonomic evaluation and first appearance".PALYNOLOGY 31(2007):191-203.
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