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

Narváez, Paula Liliana; Mego, Natalia; Prámparo, Mercedes B.

doi:10.1080/01916122.2012.762062

Cited by 15 publications

(8 citation statements)

References 26 publications

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“…The authors agree with the assumption that Ephedra-type pollen suggests aridity, considering their present-day distribution in arid regions of Europe, Asia, and North and South America, including ten modern species present in Argentina, fi ve of which are present in the northwest of the country (Hunziker & Novara, 1998). Among the spores, the Anemiaceae (three genera and seven species; Narváez et al, 2013) are dominant in the Don Bartolo Member assemblages, with the highest percentage in assemblage 8449 (54.2%) (Figure 6). Schizaeales are currently distributed in tropical and subtropical areas.…”

Section: Don Bartolo Membermentioning

confidence: 99%

“…For example, the La Yesera Formatio n palynofl ora is similar to that of the Late Albian-Cenomanian Kachaike Formation (Austral Basin; Archangelsky & Llorens, 2003Barreda & Archangelsky, 2006;; both show a predominance of Classopollis and the presence of bisaccate grains and cicatricose spores (Cicatricosisporites cuneiformis, Ruffordiaspora ludbrookiae, and R. cf. R. ticoensis; Narváez et al, 2013). There are only three genera (Alisporites, Cicatricosisporites, and Classopollis) in common with the Late Albian-Cenomanian Caleta Olivia Member of the Cañadón Seco Formation (San Jorge Basin; Archangelsky et al, 1994).…”

Section: Palynostratigraphic Analysismentioning

confidence: 99%

“…Described species are included in the following botanical groups: bryophytes and pteridophytes, gymnosperm, angiosperm and algae (see Fensome, 1987 for discussion on methods for organizing fossil species). A complete revision and taxonomic discussion of the cicatricose species found in the La Yesera Formation is included in Narváez et al (2013). Comparison.…”

Section: Systematic Palynologymentioning

confidence: 99%

“…Prámparo (1994), Atta-Peters & Salami (2006), Olivera et al (2010), Eisawi et al (2012); 2. Dettmann & Cliford (1992), Cranwell & Srivastava (2009), Narváez et al (2013);3. Lima (1978), Lima et al (1980), Narváez et al (2013);4.…”

Section: Palynostratigraphic Analysismentioning

confidence: 99%

“…Dettmann & Cliford (1992), Cranwell & Srivastava (2009), Narváez et al (2013);3. Lima (1978), Lima et al (1980), Narváez et al (2013);4. Herngreen (1973), Lima (1980), Sinanoglu (1984), Prámparo (1989b), Vajda-Santivanez (1999);5.…”

Section: Palynostratigraphic Analysismentioning

confidence: 99%

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First palynologic record of the Cretaceous La Yesera Formation (Salta Group), northwestern Argentina

Narváez¹,

Prámparo²,

García³

2014

Rev. bras. paleontol.

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-Thirty-four taxa were documented from six palynologically productive samples of the La Yesera Formation (Brealito and Don Bartolo Members) in the Pucará locality (Salta Province, northwestern Argentina). In the Brealito Member, aquatic species (mainly freshwater algae) dominate the palynofl ora, while terrestrial species are represented by trilete spores (mainly Anemiaceae) and gymnosperm pollen grains. In the Don Bartolo Member, Classopollis spp. dominate most of the assemblages, trilete Anemiaceae spores constitute half of the total counts in one of the assemblages and a unique angiosperm species (Tricolpites variabilis) was found in two assemblages. Ephedra-type pollen grains (three genera and six species) appear in both members, although in low abundance. The results support previous sedimentology studies that indicate a perennial lake environment at the time of deposition of the Brealito Member, with evidence for dry seasonality in the Don Bartolo Member. The inferred regional paleoclimate is subtropical with arid conditions. Considering the stratigraphic ranges of selected species and the sedimentology data, an Albian/Cenomanian age is suggested for the unit.

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Section: Don Bartolo Membermentioning

confidence: 99%