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Cretaceous cicatricose spores from north and central-western Argentina; taxonomic and biostratigraphical discussion

Paula L. Narvaez, Natalia Mego and Mercedes B. Pramparo
Cretaceous cicatricose spores from north and central-western Argentina; taxonomic and biostratigraphical discussion
Palynology (December 2013) 37 (2): 202-217

Abstract

Cicatricose spores have been described from Cretaceous basins worldwide. A complete revision of previous records from Argentina and other parts of South America is presented here, as well as the results of a detailed taxonomic study of the species found in the La Yesera and Lagarcito formations (north and central-western Argentina, respectively). Four genera and 11 species are described: Cicatricosisporites cuneiformis, C. pramparoana, C. sp. 1, Fisciniasporites sp. cf. F. brevilaesuratus, F. sp., Nodosisporites sp., Ruffordiaspora australiensis, R. cardielensis, R. ludbrookiae, R. cf. R. ticoensis and R. sp. 1. The genus Fisciniasporites is recorded for the first time in Argentina (in the La Yesera Formation), and similarly Nodosisporites in the San Luis Basin. The abundance of cicatricose spores is higher in the La Yesera Formation (8-54.2% of the total assemblage) than in the Lagarcito Formation (2-16%). An acme of cicatricose spore diversity in Argentina was recognised during the Aptian-Albian interval. Taxonomic studies of these types of spores are very important as they constitute a useful example of accurate descriptions and illustrations within a morphological group that has many misidentifications, and also considering the biostratigraphical significance of some species, e.g. Cicatricosisporites cuneiformis in Australia.


ISSN: 0191-6122
EISSN: 1558-9188
Serial Title: Palynology
Serial Volume: 37
Serial Issue: 2
Title: Cretaceous cicatricose spores from north and central-western Argentina; taxonomic and biostratigraphical discussion
Affiliation: Instituto Argentino de Nivologia, Glaciologia y Ciencias Ambientales, Mendoza, Argentina
Pages: 202-217
Published: 201312
Text Language: English
Publisher: American Association of Stratigraphic Palynologists, Dallas, TX, United States
References: 78
Accession Number: 2014-011373
Categories: PaleobotanyStratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Includes appendix
Illustration Description: 2 plates, 4 tables, geol. sketch map
S32°00'00" - S32°00'00", W67°30'00" - W67°30'00"
S26°00'00" - S26°00'00", W66°00'00" - W66°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, American Association of Stratigraphic Palynologists. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201408
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