A new flora from the Rio Bonito Formation (late Asselian) and its implications for the biostratigraphy of the southern Paraná Basin, Brazil

Rischbieter, M.; Neregato, Rodrigo; Iannuzzi, Roberto; Pasquo, Mercedes M. di; Alvarenga, Renata dos Santos; Freitas, J.

doi:10.1016/j.jsames.2022.104010

Cited by 6 publications

(1 citation statement)

References 49 publications

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“…Among these plants, a presumed sphenophyte species, "Sphe-nophyllum colombianum" (Huertas, 2003) (Figure 1A), was also described from La Paja Formation, far extending the temporal and stratigraphic range known for this Paleozoic genus. Sphenophyllum is an extinct plant found worldwide, ranging from the Late Devonian to the Permian and exhibiting a large morphological diversity during the Carboniferous (Taylor et al, 2009;de Felice et al, 2019;Huang et al, 2022;Rischbieter et al, 2022). Wellidentified leaves of Sphenophyllum (Figure 1B-C) are borne in whorls and typically show wedgeshaped forms with veins radiating from the leaf base (Taylor et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

An Early Cretaceous Sphenophyllum or a hatchling turtle?

Palma-Castro,

Cómbita-Romero,

Cadena

et al. 2023

Palaeontol Electron

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Correctly identifying fossil specimens from parautochtonous deposits where marine and terrestrial organisms co-occur can be challenging due to the abundance of rare and obscure specimens with unclear morphologies. In this study, we reviewed fossils from the Lower Cretaceous La Paja Formation (Ricaurte Alto, Villa de Leyva, Colombia) that were originally described as the plant "Sphenophyllum colombianum" based on an apparent resemblance to the upper Paleozoic genus. We determined that the type specimen corresponds to the carapace of a hatchling turtle. In addition, a second specimen of "S. colombianum" although less well-preserved, also exhibits similar features of a hatchling turtle. The two fossil specimens are significant as they represent the first report of hatchling marine turtles from the Aptian of northwestern South America and provide evidence of the exceptional preservation of the Marine Reptile Lagerstätte of Ricaurte Alto.

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