''Chiropteris'' is an extinct

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

of plants that existed from the Early

Permian The Permian ( ) is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.9 Mya. It is the last period of the Pale ...

(Sakmarian stage) to the Late

Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The J ...

(?Oxfordian stage, maybe latter). It is unknown whether it belongs in the Matoniaceae or the Dipteridaceae.

Description

The genus ''Chiropteris'' was named from fragmentary and whole-plant fossils. It was constituted of a short 25cm long petiole and a 16cm diameter circular leaf.

Location

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

, fossil of

''Chiropteris'', was located on outcrop in the municipalities of

São Jerônimo São Jerônimo is a municipality in the state of Rio Grande do Sul, Brazil. It is a municipality that is part of the watershed, the Jacuí River. See also *List of municipalities in Rio Grande do Sul This is a list of the municipalities in the ...

and

Mariana Pimentel Mariana Pimentel is a municipality in the state of Rio Grande do Sul, Brazil. It is located approximately 75 km from the state's capital, Porto Alegre. Geography Mariana Pimentel belongs to Porto Alegre Metropolitan Mesoregion and to Porto ...

. They are in the geopark Paleorrota in

Rio Bonito Formation The Rio Bonito Formation is a geological formation of the Paraná and Pelotas Basins of Permian age. It is represented by a succession of cyclic sedimentary packages of sandstones, siltstones and shales which bear extensive deposits of coal that ...

and date from

Sakmarian In the geologic timescale, the Sakmarian is an age or stage of the Permian. It is a subdivision of the Cisuralian Epoch or Series. The Sakmarian lasted between 293.52 and million years ago (Ma). It was preceded by the Asselian and followed b ...

References

Ginkgophyta Prehistoric plant genera Permian plants Triassic plants Permian first appearances Triassic extinctions Prehistoric plants of South America Permian life of South America Triassic life of South America Permian Brazil Triassic Brazil Fossils of Brazil Paraná Basin Flora of Rio Grande do Sul {{triassic-plant-stub