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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
Source PublicationPALYNOLOGY

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.

KeywordOrdovician Tremadocian Acritarchs Organic-walled Microphytoplankton Taxonomy Biostratigraphy
WOS KeywordOrganic-walled Microphytoplankton ; Ordovician Acritarchs ; Cambrian-ordovician ; Middle Ordovician ; Stavelot Inlier ; Algerian-sahara ; Stancliffe 1994 ; South China ; Ne-germany ; Assemblage
WOS Research AreaPlant Sciences ; Paleontology
WOS SubjectPlant Sciences ; Paleontology
WOS IDWOS:000252435100016
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Document Type期刊论文
Corresponding AuthorServais, Thomas
Affiliation1.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
Recommended Citation
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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