First megafloristic record for the Chubut Group at Somuncurá-Cañadón Asfalto Basin: An angiosperm dominated flora from the Upper Cretaceous Puesto Manuel Arce Formation, Patagonia Argentina

Passalia, Mauro Gabriel; Llorens, Magdalena; Paez, M.

doi:10.1016/j.cretres.2015.04.016

Cited by 17 publications

(4 citation statements)

References 91 publications

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“…This suggests that early angiosperms may have had long distance migration from the originated area. The angiosperm leaves exhibit high diversity in the margins (toothed and smooth), leaf shape (reniform, cordate, and peltate), and well-defined venation (palmate, pinnately, and others) (e.g., Doyle, 2012;Passalia et al, 2015) (Fig. 7e).…”

Section: Mid-cretaceous Angiosperm Megafossilsmentioning

confidence: 99%

Mid‐Cretaceous Hothouse Climate and the Expansion of Early Angiosperms

Zhang

Dai

et al. 2018

Acta Geologica Sinica (Eng)

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The remarkable transition of early angiosperms from a small to a dominant group characterized the terrestrial ecosystem of the Cretaceous. This transition was instigated and promoted by environmental changes. Mid‐Cretaceous is characterized by major geological events that affected the global environment. δ18O, palaeothermometer TEX86, and other climatic indices from marine sediments suggest rapid temperature increase during mid‐Cretaceous despite occasional short cooling events. Simultaneously, terrestrial deposits in East Asia changed from coal‐bearing to shale, then to red beds and evaporites. Plant assemblages and other paleoclimate indicators point to rapid aridification for mid‐Cretaceous terrestrial environments. In addition, the wildfires were frequently spread all over the earth by the numerous charcoal evidence during the Mid‐Cretaceous. Thus, we speculate that the seasonally dry and hot conditions of mid‐Cretaceous created a fiery hothouse world. Early angiosperms increased in abundance and diversity and evolved from a few aquatic species to terrestrial herbaceous and then to the diversified flora of today. Angiosperms showed rapid physiological evolution in vein density and leaf area that improved photosynthesis and water absorption. These ecophysiological changes made early angiosperms well adapted to the hot and dry environment in mid‐Cretaceous. Moreover, these physiological changes facilitated the fire–angiosperm cycles in mid‐Cretaceous that likely further stimulated the early angiosperm evolution.

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Section: Mid-cretaceous Angiosperm Megafossilsmentioning

confidence: 99%

Mid‐Cretaceous Hothouse Climate and the Expansion of Early Angiosperms

Zhang

Dai

et al. 2018

Acta Geologica Sinica (Eng)

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“…1). In fact, the angiosperms experienced an important pulse of diversification in Patagonia during the Albian and Cenomanian (Archangelsky et al, 2009), being probably the principal component in some environments (Iglesias et al, 2007;Passalia et al, 2015). The rise of angiosperms during the mid-Cretaceous is often shown as coincident with an important fall in the diversity and abundance of many Mesozoic non-flowering vascular plants, including some ferns (i.e.…”

Section: Mid-cretaceous Matoniaceae: Paleoclimate Conditions and Angi...mentioning

confidence: 99%

The fern Konijnenburgia alata in the mid-Cretaceous of Patagonia, and the Matoniaceae fossil record

Passalia

Iglesias

Varela

et al. 2018

Cretaceous Research

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“…The formation, which is part of the more broadly distributed Chubut Group (sensu Codignotto et al, 1978), was the focus of several regional studies and compilations lacking a detailed sedimentary framework (Figari and Courtade, 1993;Cortiñas, 1996;Figari, 2005;Ranalli et al, 2011;Figari et al, 2015). Some local and relatively exhaustive palaeoenvironmental inferences have been included in sedimentological papers from partial sections of some stratigraphic intervals (Manassero et al, 2000;Cladera et al, 2004;Foix et al, 2012;Carmona et al, 2016), and in palaeontological contributions (Genise et al, 2010;de la Fuente et al, 2011;Argañaraz et al, 2013;Perez et al, 2013a,b;Passalia et al, 2015;Sterli et al, 2015). The palaeontological topic acquires significance, since the Cerro Barcino Formation has yielded some of the most complete titanosauriform remains (e.g., the titanosauriform Chubutisaurus; del Corro, 1975;Salgado, 1993;Carballido et al, 2011) and an undescribed gigantic basal titanosaur from Las Plumas zone, eastward from the study area (Carmona et al, 2016).…”

Section: Introductionmentioning

confidence: 99%