Sueria laxinervis, a new fossil species of Cycadales from the Upper Cretaceous Quiriquina Formation in Cocholgüe, Bíobío Region, Chile

Yamada, Toshihiro; Yamada, Takae F.; Terada, Kazuo; Ohsawa, Takeshi; Yabe, Atsushi; Legrand, Julien; Uemura, Kenichiro; Leppe, Marcelo; Hinojosa, Luis Felipe; López-Sepúlveda, Patricio; Nishida, Harufumi

doi:10.11646/phytotaxa.402.2.7

Cited by 2 publications

(2 citation statements)

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“…Its composition comprises sandstones, conglomerate sandstones and claystone, interspersed with coal beds and mollusc-bearing levels (Gonzalez, 1953). According to Yamada and Uemura (2006), this Formation would be composed of two members, a lower one containing foliar imprints and an upper one having silicified woods. The lower member was described in Pozo Cisne 6 locality, with an outcrop of ∼15 m and two levels containing leaf imprints (LA1 and LA2) (Figure 3) (Yamada & Uemura, 2006).…”

Section: Geologymentioning

confidence: 99%

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Climate and Vegetation of the Miocene of Tierra del Fuego: Filaret Formation

Sandoval,

Yabe,

Nishida

et al. 2024

Paleoceanog and Paleoclimatol

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The changing climate during the Cenozoic affected the diversity of plants in Patagonia, as species richness tends to increase during warm periods and decrease during cold periods. Precipitation is a significant factor shaping diversity, as shown in the case of central Chile during the Miocene. This study presents a reconstruction of the climate and vegetation in Tierra del Fuego Island, located approximately 52°S, using fossil flora recovered from the Filaret Formation to understand the Miocene epoch, characterized by contrasting global climatic changes. Filaret flora comprises twenty‐seven morpho‐taxa, including nine Nothofagus species and other Gondwanan and Neotropical families, such as Atherospermataceae and Anacardiaceae, in agreement with a forest habitat. Leaf physiognomy climate reconstruction suggests microthermal conditions, with a mean annual temperature of 9.4–11°C and annual precipitation ranging from 985 to 1,130 mm. These conditions are warmer and wetter than the modern record of the area, with a MAT of 6°C and mean annual precipitation of 300 mm. As the Filaret fossil record suggests, the forest habitat under a microthermal climate is consistent with the global climatic reconstruction of the Early Miocene. This Miocene landscape on Tierra del Fuego was possible because the Andes could not rain‐shadow humid westerly winds by this timeframe.

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Section: Geologymentioning

confidence: 99%

“… Stratigraphic column described by Yamada and Uemura (2006), corresponding to the Pozo Cisne 6 locality from the Filaret Formation. Details of facies (LA1‐5) in the publication.…”

Section: Introductionmentioning

confidence: 99%