''Taubacrex'' is an

extinct Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of birds of the family

Quercymegapodiidae Quercymegapodiidae is an extinct group of stem Galliformes birds with fossils found in France and Brazil.Mayr, Gerald (2009) ''Paleogene Fossil Birds''. Berlin: Springer. References

Quercymegapodiidae, Paleogene birds of Europe Pale ...

from the

Late Oligocene The Chattian is, in the geologic timescale, the younger of two ages or upper of two stages of the Oligocene Epoch/Series. It spans the time between . The Chattian is preceded by the Rupelian and is followed by the Aquitanian (the lowest stage ...

Early Miocene The Early Miocene (also known as Lower Miocene) is a sub-epoch of the Miocene Epoch made up of two stages: the Aquitanian and Burdigalian stages. The sub-epoch lasted from 23.03 ± 0.05 Ma to 15.97 ± 0.05 Ma (million years ago). It was prece ...

(

Deseadan The Deseadan ( es, Deseadense) age is a period of geologic time (29.0–21.0 Ma) within the Oligocene epoch of the Paleogene to the Early Miocene epoch of the Neogene, used more specifically within the SALMA classification of South America. It fo ...

)

Tremembé Formation Tremembé is a municipality in the state of São Paulo in Brazil. It is part of the Metropolitan Region of Vale do Paraíba e Litoral Norte. The population is 47,714 (2020 est.) in an area of 191.09 km². The elevation is 560 m. A shr ...

of the

Taubaté Basin Taubaté is a medium-sized city in the State of São Paulo, in southeastern Brazil. Location Its strategic location between the two most important Brazilian cities (São Paulo away, and Rio de Janeiro away), connected to both by the Presiden ...

in the state of

São Paulo São Paulo (, ; Portuguese for 'Saint Paul') is the most populous city in Brazil, and is the capital of the state of São Paulo, the most populous and wealthiest Brazilian state, located in the country's Southeast Region. Listed by the GaWC a ...

, Brazil. The type species is ''Taubacrex granivora''. In the original description, Herculano Alvarenga classified it as a member of family

Rallidae The rails, or Rallidae, are a large cosmopolitan family of small- to medium-sized, ground-living birds. The family exhibits considerable diversity and includes the crakes, coots, and gallinules. Many species are associated with wetlands, althoug ...

. It provides the earliest fossil record of

gastrolith A gastrolith, also called a stomach stone or gizzard stone, is a rock held inside a gastrointestinal tract. Gastroliths in some species are retained in the muscular gizzard and used to grind food in animals lacking suitable grinding teeth. In othe ...

s in birds of the order

Galliformes Galliformes is an order of heavy-bodied ground-feeding birds that includes turkeys, chickens, quail, and other landfowl. Gallinaceous birds, as they are called, are important in their ecosystems as seed dispersers and predators, and are often ...

.Mayr, Gerald (2009) ''Paleogene Fossil Birds''. Berlin: Springer.

References

Quercymegapodiidae Paleogene birds of South America Oligocene animals of South America Miocene birds of South America Deseadan Paleogene Brazil Neogene Brazil Fossils of Brazil Fossil taxa described in 1988 Tupi–Guarani languages {{paleo-bird-stub