http://dx.doi.org/10.15446/esrj.v19n2.50245.

PALEONTOLOGY

The Tatuí Formation (Early Permian, Paraná Basin), Brazil: Paleontology and Paleoenvironmental Considerations

La Formación Tatuí (Pérmico Temprano, Cuenca del Paraná), Brasil: Consideraciones paleontológicas y paleoambientales

Artur Chahud¹, Setembrino Petri²

¹ Instituto de Geociências da Universidade de São Paulo, Departamento de Geologia Sedimentar e Ambiental. Rua do Lago, 562. Cidade Universitária 05508900 - São Paulo, SP - Brasil e-mail: arturchahud@yahoo.com
² Universidade de São Paulo, Instituto de Geociências, Departamento de Geologia Sedimentar e Ambiental. Rua do Lago, 562. Cidade Universitária 05508900 - São Paulo, SP - Brasil. Tel. profissional. (11) 3091-4662. e-mail: spetri@usp.br

Record
Manuscript received:17/04/2015 Accepted for publication: 16/05/2015

ABSTRACT

The Tatuí Formation, one of the Brazilian Paraná Basin geological units, is developed solely in the State of São Paulo, southeast Brazil. It is studied herein, through outcrops at the eastern border of the basin, which are siltstones and fine sandstones, interbedded with some coarse and conglomeratic sandstones. Published papers on its fossils are sparse, dealing with some groups but not involving the entire association. This paper deals with ichnofossils, arthropods (conchostracans, isopods, and indeterminate crustaceans), plants (pteridophytes and spermatophytes) and fish remains (scales and teeth of Actinopterygii and Sarcopterygii). Foraminifers and sponge spicules were reported in short communications without illustrations and from uncertain stratigraphic positions. The Tatuí Formation paleoenvironmental deposition evolved through three phases. The first contains only the euryhaline fossils in siltstone beds. The second phase is regressive, with continental fossils (conchostracans and plants) in massive or laminated siltstone beds and conglomerates. The third stage is transgressive with hummocky cross - stratification in sandstone and increasing salinity.

Keywords: Rock mass classification, Rock slope, Q, RMR, SMR, SQR.

RESUMEN

La Formación Tatuí es una unidad litoestratigráfica de la Cuenca del Paraná que aflora exclusivamente en el Estado de São Paulo, Brasil. En su borde nororiental está formada por limolitas y areniscas finas que poseen intercalaciones de areniscas gruesas y conglomeráticas. Este trabajo caracterizó en esta formación diversas evidencias de fósiles: huellas, artrópodos (conchostracos, crustáceos isópodos e indeterminados), vegetales (helechos y fanerógamas) y restos de vertebrados (escamas y dientes de Actinopterygii y Sarcopterygii). Foraminíferos y espículas de esponjas fueron reportados en comunicaciones breves, entretanto, sin estar acompañado de ilustraciones y de sus posiciones estratigráficas. Tres fases de deposición permiten reconstruir el paleoambiente de la Formación Tatuí. En la primera fase hay presencia solamente de fósiles eurihalinas en limolitas. En la segunda fase, fósiles continentales (conchostracos y vegetales) que están presentes en camadas limolíticas masivas o laminadas y en conglomerados vinculados a una etapa regresiva. Finalmente, la tercera fase se caracteriza por una etapa transgresiva con la presencia de estratificación cruzada "hummocky" y aumento de la salinidad.

Palabras clave: Permiano, Paleontologia, Estratigrafía, Cuenca del Paraná.

Introduction

Pennsylvanian - Permian lithostratigraphic units of the Brazilian Paraná Basin are, from the oldest to the youngest: Itararé, Guatá, and the Passa Dois Groups. They are joined in the Gondwana I Supersequence by Milani and Ramos (1998).

Fine sandstones, sometimes bearing hummocky cross stratification, and siltstones are the main lithologies of the Tatuí Formation. Coarse and conglomeratic sandstones, locally rather thick, are minor lithologies (Washburne, 1930; Soares, 1972; Massoli, 1980; Fúlfaro et al., 1984; Stevaux et al., 1986; Assine et al., 2003; Holz et al., 2010; Chahud, 2011; Chahud et al., 2012). Most of these contributions dealt with lithostratigraphy and paleoenvironments, but the fossils are recorded in poor communications without descriptions and illustrations.

Thick conglomeratic beds were informally known as the Ibicatu Facies (Soares, 1972). The type section of this facies, now destroyed, was covered by deposits of the Irati. So, this facies was sometimes wrongly allocated to the Irati basal beds (Taquaral Member). The Ibicatu Facies is indeed present at different stratigraphic positions within the Tatuí Formation (Fúlfaro et. al., 1984; Stevaux et al., 1986; Assine et al., 2003; Holz et al., 2010; Chahud, 2011).

All known fossiliferous outcrops of the Tatuí Formation are located in the uppermost 10m of the unit (Mezzalira 2000; Chahud, 2011; Chahud et al., 2010a; Chahud et al., 2012). The present contribution stands out from previous investigations by different approaches as to details of fossil taxa, granulometry, depositional evolution, biostratigraphy and paleoenvironments.

TATUÍ LITHOSTRATIGRAPHY

Older researchers considered this formation as essentially made up of two lithologic bodies, recognized by different colors, with a diastem between (Soares, 1972, Fulfaro et al., 1984).

The lower body, a thick brown - purplish finely laminated siltstone (whitish locally), with interbedded chert-limestone, a few millimeters to 30 cm thick. This lower body is seldom exposed. There are occasional references to foraminifers, without description and illustration (Fúlfaro et. al., 1984) and never confirmed by later researchers (Mezzalira and Martins Neto, 1992; Assine et al., 2003; Holz et al., 2010; Chahud, 2011; Chahud et al., 2012).

The second body is gray-greenish to yellow-greenish siltstones and fine sandstones and conglomerates exhibiting rather round clasts with cross-bedding and ripple marks. From angular to rounded chert pebbles are reported. Three lithologies are reported, correlated with the classical lithologic bodies. The herein described lithologies are the only surely fossiliferous Tatuí beds. They are the following:

Fine to very fine sandstones with hummocky

Very fine, thinly laminated or massive whitish sandstones, outcrop right under an Irati Formation bed. Sometimes these sandstones acquired a light yellow color, possibly due to weathered pyrite nodules, from the basal Irati bed.

This facies is interbedded with other Tatuí lithologies, discussed below. It is scarcely fossiliferous, small Osteichthyes scales (Ragonha, 1978; Chahud and Petri, 2008a, 2008b, 2009b, 2010b, 2012a, 2012b, 2014) are rarely present. Ichnofossils, right under the Irati bed, were reported (Chahud et al., 2010a)

Very fine sandstones and siltstones, massive or finely laminated

Defined by very well sorted brownish white, very fine sandstone to siltstone, mostly massive, sometimes parallel or cross laminated. Some lateral variation in granulometry occurs but never over fine sandstones.

Scarcely fossiliferous, these strata contain rare arthropods (conchostracans and indeterminate crustaceans), fish scales and loose remains. The fossils are recognized only in unweathered samples. Occasionally they occur right in sharp contact with the Taquaral Member of the Irati Formation, which are either coarse sandstones or siltstones (Assine et al., 2003; Chahud et al., 2010a; Chahud and Petri 2013a; 2013b).

Conglomerates

Conglomerate, informally known as the Ibicatu facies since Soares (1972), contains siliceous pebbles one to three centimeters in size, "floating" in a light brown coarse sandstone matrix.

The type locality was a road cut later destroyed by road widening. It was six meters thick, according to Fúlfaro et al. (1984) and Stevaux et al. (1986). Right above, in sharp contact, came deposits of the Taquaral Member of the Irati, reported by these researchers.

The type section had a significant amount of large plant fossils, specimens that reach nearly one meter (Figs. 2 and 3).

Conglomerates, like the Ibicatu, were reported in other outcrop localities from the State of São Paulo but stratigraphically not in contact with the Irati (Stevaux et al., 1986; Assine et al., 2003; Chahud, 2011; Chahud et al., 2012), with sigmoidal structure, and ichnofossils are present in the upper beds. However, these structures were not present in the type locality (Stevaux et al., 1986).

The upper Tatuí Formation, here discussed, is sketched in figure 3. It must be placed in the Late Paleozoic third order sequence of the Tatuí, LPTS-4, of Holz et al. (2010). These authors believe this sequence to be middle Artinskian in age. However, it is possible that the base of Tatuí Formation, not discussed in that paper, might be placed in an older sequence, LPTS3.

The columnar section (fig. 3) was based on center-east outcrops in the State of São Paulo (Stevaux et al., 1986; Assine et al., 2003; Chahud et al., 2010b; Chahud and Petri, 2010b, 2015). Most of the Tatuí outcrops occur in this area.

PALEONTOLOGY

Ichnofossils

Bioturbated deposits were recorded with two morphotypes in two Tatuí Formation lithologies. The first was described by Chahud et al. (2012) in lithology 1, below deposits interpreted by the authors as representing a freshwater paleoenvironment (lithology 2).

The structures are simple irregular conical excavations, irregular oval or elongate openings lay down in seen both from above and perpendicular to the beds (Fig 4A-B).

The second morphotype (Fig. 4C) is seen in poorly sorted sandstone with sigmoidal structure interbedded with silty beds (lithology 3 Fig. 3), observed in outcrop as a lateral extension of the remainder of the destroyed Ibicatu type-locality.

It is a set of horizontal trails of 5mm width with simple ramifications, without preferential direction, many tracks cut perpendicular or askew other trails. There are no spines, paws, claws or any ornamentation, just smooth trails and structureless fill with lithology similar to host rock. The structures are preserved in negative and positive relief, this being the most common.

This ichnofossil might be ascribed to following four ichnogenera, known in the Guatá Group: Gordia, Helminthopsis, Palaeophycus and Planolites (Fernandes et al., 2002; Netto et al., 2012)

Gordia, Helminthopsis, and Planolites are widespread and common in three ichnofacies: Cruziana, Mermia, and Nereites. Palaeophycus is restricted to the Cruziana, is the genus attributed to this ichnofossil. It also appears in the Palermo Formation (Fernandes et al., 2002; Netto, 2000; Netto et al., 2012), partially chrono-correlated to the Tatuí Formation.

Several biogenic perforations occur at the interface Tatuí-Taquaral (lithologies 1 and 4, Fig. 3). Animals that lived at the beginning of Taquaral deposition, right after the final of Tatuí deposition, were responsible for these structures.

Plant fossils

Only sparse, isolated, fragmented remains of plant fossils in the Tatuí beds have been reported in the literature. The first occurrences of larger and better-preserved specimens came from the Ibicatu conglomerate (Fúlfaro et al., 1984; Assine et al., 2003; Chahud and Petri, 2009a).

These fossils, the largest of the present study, are Pteridophyta and Spermatophyta trunks. The great Pteridophyta fragments of elongate stems (fig. 5A and B), several centimeters long, were investigated by Chahud (2011), who placed them in the genus Tietea (Solms-Laubach, 1913), by the shape of the meristeles, similar to those described by Derby (1915) and Tavares (2007), at the Corumbataí Formation, units younger than Tatuí, and also by the absence of the organized meristeles in the central part of the stele, features which exclude the genus Psaronius, with well defined and organized meristeles.

Another kind of Ibicatu stem, but smaller and apparently less frequent, was attributed to Spermatophyta. It is a gymnospermic cylindrical type (Fig. 5C-D), compact and deformed and irregularly elongate.

The plant fossils were dispersed among the conglomerate with clasts 5mm to 3cm in size. None of the fossils are in "life position", each laid down horizontally by the current, which direction was registered as E-W for the two kinds of the stems. Previously Stevaux et al. (1986) reckoned a sole N-S direction for the fossils, before the destruction of the outcrop.

Diagenesis acted before final fossilization, mainly through compression by sediment inflow, increasing the fossil widths and internal deformations.

Arthropods

Conchostracans

They are preserved as impressions with few external morphological features. Sometimes the umbo is easily seen. The entire outline of growth lines is scarcely observed. No thicknesses neither concave - convex shapes are detected.

The best-preserved specimens allowed distinction of the valves as oval rounded in outline (Fig. 6A and B) similar to both recent and Paleozoic forms (Brito et al., 2000; Ferreira de Oliveira, 2007). However, it is not possible to classify them at the genus level, based only on the features noted above.

A lot of packed conchostracans were reported in a silty laminated bed (Fig. 3) with characteristics of free - settling and absence of traction action (Chahud et al., 2012). These fossils are packed as a "shell bed", interbedded with others with less numerous fossils. The assemblage concentration changes upward and sideward.

Other Crustaceans

Chahud et al. (2012) reported unidentified crustaceans in massive finely laminated sandstones and siltstones (Fig. 6C)

Paleovertebrates

Some vertebrates are also associated with the conchostracans and others scarcely present in the fine sandstones with hummocky (Ragonha,1978; Chahud and Petri, 2009c). A unique identification of a semi-articulated fish, Actinopterygii, a kind of Platysomoidea, was reported by Silva Santos (1991). The Mezzalira and Martins Neto (1992)'s crustaceans came from the same outcrop.

The fossils, as a rule, were preserved as scales and loose teeth of the Palaeonisciformes and Coelacanthimorpha, dispersed and fragmented among the matrix (Fig. 6E-F).

Other fossils

Rare fossils, assigned to the Tatuí beds, were mentioned in papers published before this contribution. Most of them were placed in beds wrongly thought to belong to the Tatuí Formation.

Barbosa and Almeida (1949) and Almeida and Barbosa (1953) reported sponge spicules in beds believed to be Tatuí. They neither described nor illustrated the spicules, furthermore the stratigraphic position of the beds is uncertain.

Three foraminifera genera, Erlandia, Ammodiscus, and Hyperamina, were reported by Fúlfaro et al. (1984) in silty sandstones. These fossils came from the basal beds of the Tatuí, and would be probably a continuation of the conditions of deposition of the upper Itararé Group. Lima et al. (1976) recognized Ammodiscus and Hyperamina in the Itararé beds.

Conclusions And Paleoenvironmental Considerations

The record of the entire Tatuí Formation fossils are ichnofossils, plant fossils, bones of fishes and arthropods. Only ichnofossils and fishes are reported in more than one lithology (coarse and fine sandstones).

The Tatuí Formation paleoenvironment of deposition evolved through three phases. The first apparently contains only the euryhaline fossils, agglutinated foraminifera mentioned by Fúlfaro et al. (1984). These fossils are common in brackish waters that may be transitional from coastal estuary complex to coastal marine.

Another two phases, from the upper Tatuí, reflect the interplay of two paleoenvironments.

The deposits of the second phase are regressive and continental, with conchostracans dropped downward without further transportation, in a lacustrine deposit, within the siltstones massive or laminated beds (lithology 2, Fig. 3), and large plant stems in the conglomerates (lithology 3, Fig. 3), fluvial deposits.

The third phase is transgressive with hummocky cross - stratification and, probably, increasing salinity, similar to the first stage (lithology one contact with lithology four, Fig. 3).

Acknowledgments

The authors thank the National Council for Scientific and Technological Development (CNPq) (Grant: 500755/2013-2) for financial support, Prof. Dr. Thomas Rich Fairchild and the Dr. ‎Annabel Pérez Aguilar for support and jointing field researchers. The authors also thank the Departamento de Geologia Sedimentar e Ambiental of the Institute of Geoscience of the University of São Paulo which allowed the preparation of fossils in its laboratories.

References

Almeida. F.F.M. and Barbosa, O. (1953). Geologia das quadrículas de Piracicaba e Rio Claro. Estado de São Paulo. Rio de Janeiro. Boletim do DNPM/DGM, 143, 96p.         [ Links ]

Assine, M. L., Zacharias, A. A. and Perinotto, J. A. J. (2003). Paleocorrentes, paleogeografia e seqüências deposicionais da Formação Tatuí, centro-leste do Estado de São Paulo. Revista Brasileira de Geociências. 33, no. 1, 33-40.         [ Links ]

Barbosa O. and Almeida F.F.M. (1949). Nota sobre a estratigrafia da Série Tubarão em São Paulo. Anais da Academia Brasileira de Ciências. 21, no. 1, 65-68.         [ Links ]

Brito, I.M., Carvalho, I.S., Vicalvi, M.A. and Carvalho, M.G.P. (2000). Artrópodes. I. S. Carvalho (Editor) Paleontologia. Rio de Janeiro, Editora Interciência. p. 423-451.         [ Links ]

Cabral Jr. M., Campanha, V. A., Motta, J. F. M. and Saad, A. R. (1988). Contribuição à estratigrafia e paleogeografia da interface Itararé e Tatuí (P) e considerações sobre sua potencialidade para carvão no Estado de São Paulo. 35th Congresso Brasileiro de Geologia, Belém. Pará. 2: 879-892.         [ Links ]

Chahud, A. (2007). Paleontologia de Vertebrados da Transição entre os grupos Tubarão e Passa Dois no Centro-Leste do Estado de São Paulo. Master Dissertation, Instituto de Geociências da Universidade de São Paulo. São Paulo. Brasil.         [ Links ]

Chahud, A. (2011). Geologia e paleontologia das formações Tatuí e Irati no centroleste do Estado de São Paulo. PhD Thesis. Programa de Pós-Graduação em Geoquimica e Geotectônica do Instituto de Geociências da Universidade de São Paulo, São Paulo. Brasil.         [ Links ]

Chahud, A., Duque, J. M. and Petri, S. (2010a). Consideraciones geológicas y paleontológicas de las formaciones Tatuí e Iratí (Pérmico), Cuenca de Paraná, Brasil. Geología Colombiana, 35, 36-49.         [ Links ]

Chahud, A., Fairchild, T. R. and Petri, S. (2010b). Chondrichthyans from the base of the Irati Formation Permian, Parana Basin), São Paulo, Brazil. Gondwana Research, 18, 528-537.         [ Links ]

Chahud, A., Pacheco, M. L. A. F., Meira, F. E., Romero, G. R. and Petri, S. (2012). Paleontology and depositional environments of the Tatuí and Irati formations (Permian) in the Ponte Nova Farm, Ipeúna, state of São Paulo. Revista Brasileira de Geociências. 42, no. 1, 198-212.         [ Links ]

Chahud, A. and Petri, S. (2008a). Chondrichthyes no Membro Taquaral, base da Formação Itati, no centro-leste do Estado de São Paulo, Brasil. Revista de Geologia Fortaleza, 21, 169-179.         [ Links ]

Chahud, A. and Petri, S. (2008b). Registro de paleoniscóides na base do Membro Taquaral, Formação Irati, Permiano da Bacia do Paraná. Revista do Instituto Geológico. São Paulo. 29, no. 1/2, 33 -40.         [ Links ]

Chahud, A. and Petri, S. (2009a). Levantamento inicial dos fósseis vegetais da Fácies Ibicatu, Formação Tatuí (Permiano) do Estado De São Paulo. Paleo, 2009, Guarulhos. Boletim de Resumos.         [ Links ]

Chahud, A. and Petri, S. (2009b). Novos Xenacanthidae (Chondrichthyes, Elasmobranchii) da base do Membro Taquaral, Formação Irati, Permiano da Bacia do Paraná. Revista do Instituto Geológico. 30, no. 1/2, 19-24.         [ Links ]

Chahud, A. and Petri, S. (2009c). Sarcopterygii do Topo da Formação Tatuí e Base da Formação Irati, Permiano, São Paulo, Brasil. Revista Ung Geociências, 8, 39-46.         [ Links ]

Chahud, A. and Petri, S. (2010a). Anfíbio e Paleonisciformes da Porção Basal do Membro Taquaral, Formação Irati (Permiano), Estado de São Paulo, Brasil. Geologia USP. Série Científica. 10, no. 1, 29-37.         [ Links ]

Chahud, A. and Petri, S. (2010b). O tubarão Taquaralodus albuquerquei (Silva Santos, 1946) do Membro Taquaral (Permiano, Formação Irati) no Estado de São Paulo. Acta Biologica Paranaense. 39, 1-17.         [ Links ]

Chahud, A. and Petri, S. (2012a). Levantamento dos cladodontes sul-americanos e novos espécimes do Membro Taquaral (Formação Irati, Permiano), Bacia do Paraná. Boletim Paranaense de Geociências. 66-67, 23-29.         [ Links ]

Chahud, A. and Petri, S. (2012b). Sarcopterygii do Eopermiano da Bacia do Paraná, Estado de São Paulo. Revista do Instituto Geológico. 33. no. 2, 57-64.         [ Links ]

Chahud, A. and Petri, S. (2013a). Paleontology of Taquaral Member silty shale in the State of São Paulo. Brazilian Journal of Geology. 43, 117-123.         [ Links ]

Chahud, A. and Petri, S. (2013b). The silty shale Taquaral Member of the early Permian Irati Formation (Paraná Basin, Brazil). Paleontology and paleoenvironments. Swiss Journal of Palaeontology. 132, 119-128.         [ Links ]

Chahud, A. and Petri, S. (2014). New chondrichthyans from the Irati Formation (Early Permian, Paraná Basin), Brazil: origin, paleoenvironmental and paleogeographical considerations. Proceedings of the Geologists' Association. 125. no. 4, 437-445.         [ Links ]

Chahud, A. and Petri, S. (2015) Geology and Taphonomy from the Base of the Taquaral Member, Irati Formation (Permian, Paraná Basin), Brazil. Acta Geologica Polonica. 65. no. 3, 379-387.         [ Links ]

Derby, O. A. (1915). Illustrations of the stem structure of Tietea singularis. American Journal of Science 36, 4, 251-260.         [ Links ]

Fernandes, A. C. S., Borghi, L., Carvalho, I. S. and Abreu, C. J. (2002). Guia dos Icnofósseis de Invertebrados do Brasil. Rio de Janeiro: Editora Interciência. 260 pp.         [ Links ]

Ferreira de Oliveira, L. G. (2007). Conchostráceos permianos da Bacia do Paraná: taxonomia, evolução, bioestratigrafia e paleobiogeografia. PhD Thesis, Universidade Estadual Paulista, Rio Claro, Brasil. 241p.         [ Links ]

Fúlfaro, V. J., Stevaux, J. C., Souza-Filho, E. E. and Barcelos, J.H. (1984). A Formação Tatuí (P) no Estado de São Paulo. 33th Congresso Brasileiro de Geologia. Rio de Janeiro, Sociedade Brasileira de Geologia. Anais...(2): 711-723.         [ Links ]

Herbst, R. (1987). Studies on Psaroniaceae.II. Tuvichapteris solmsi nov.gen. et. sp. From the Permian of Paraguay and Uruguay. 4th Congresso Latino-Americano de Paleontologia, Bolívia. Anais... 267-282.         [ Links ]

Holz, M., França, A.B., Souza, P.A., Iannuzzi, R. and Rohn, R. (2010). A stratigraphic chart of the Late Carboniferous/Permian succession of the eastern border of the Paraná Basin, Brazil, South America. Journal of South American Earth Sciences, 29, 381-399.         [ Links ]

Lima, M. R., Saad, A. R., Carvalho, R. G. and Santos, P. R. (1976). Foraminíferos arenáceos e outros fósseis do Subgrupo Itararé (Neopaleozóico), Bacia do Paraná, São Paulo, Brasil. 29th Congresso Brasileiro de Geologia. Anais... Ouro Preto 2: 49-65.         [ Links ]

Marasco, S.A., Souza, P.A. and Pires, F.A. (1993). Ocorrência de paleomicroplâncton marinho (Acritarcha) associado a ictiofósseis na base do Membro Taquaral, Formação Iratí (Permiano Superior da bacia do Paraná), região de Itapetininga, Estado de São Paulo. 13th Congresso Brasileiro de Paleontologia e 1th Simpósio Paleontológico do Cone Sul, São Leopoldo, RS. Sociedade Brasileira de Paleontologia, UNISINOS, Boletim de Resumos. 60.         [ Links ]

Massoli, M. (1980). Geologia da folha de Santa Rita do Passa Quatro. Revista do Instituto Geológico, São Paulo, 1, no.1, 7-14.         [ Links ]

Mezzalira, S. (2000). Os fósseis do Estado de São Paulo. Parte II. Período 1987 (parcial) - 1996. São Paulo, Instituto Geológico. Boletim do Instituto Geológico, 15, 70 p.         [ Links ]

Mezzalira, S. and Martins-Neto, R.G. (1992). Novos crustáceos paleozóicos do Estado de São Paulo com descrição de novos taxa. Acta Geológica Leopoldensia. Estudos Tecnológicos. São Leopoldo. 15, no. 36, 49-65.         [ Links ]

Milani, E. J., Melo, J. H. G., Souza, P. A., Fernandes, L. A. and França, A. B. (2007). Bacia do Paraná. Boletim de Geociências da Petrobrás, 15, 265-287.         [ Links ]

Milani, E. J., and Ramos, V. A. (1998). Orogenias paleozóicas no domínio sul-ocidental do Gondwana e os ciclos de subsidência da Bacia do Paraná. Revista Brasileira de Geociências, 28, 473-484.         [ Links ]

Netto, R.G. (2000). Paleoicnologia do Rio Grande do Sul. M. Holz, L. F. De Ros, (editors). A paleontologia do Rio Grande do Sul. Porto Alegre. 25-43.         [ Links ]

Netto, R.G., Tognoli, F.M.W., Gandini, R., Lima, J. H. D. and Gibert, J.M. (2012). Ichnology of the Phanerozoic deposits of southern Brazil. R. G. Netto, N. B. Carmona, and F.M.W. Tognoli, (Editors.). Ichnology of Latin America - Selected Papers. 1. Porto Alegre: Sociedade Brasileira de Paleontologia. 2, 37-68.         [ Links ]

Ragonha, E.W. (1978). Chondrichthyes do Membro Taquaral (Formação Irati) no Estado de São Paulo. Master Dissertation, Instituto de Geociências da Universidade de São Paulo. São Paulo. Brasil.         [ Links ]

Silva Santos, R. (1991). Palaeonisciformes da Estado de São Paulo. 12th Congresso Brasileiro de Paleontologia. IG-USP. São Paulo. Boletim de Resumos. 11.         [ Links ]

Soares, P.C. (1972). O limite glacial/pós-glacial do Grupo Tubarão no Estado de São Paulo. Anais da Academia Brasileira de Ciências, 44(suplemento), 333-342.         [ Links ]

Solms-Laubach, H. (1913). Tietea singularis. Ein neuer Pteridinenstamm aus Brasilien. Zeitschrift für Botanik. 5, 673-700.         [ Links ]

Stevaux, J.C., Souza-Filho, E. E. and Fúlfaro, V.J. (1986). Trato deposicional da Formação Tatuí (P) na área aflorante do NE da Bacia do Paraná, Estado de São Paulo. 35th Congresso Brasileiro de Geologia, Goiânia. Sociedade Brasileira de Geologia. Anais. no. 1: 219-229.         [ Links ]

Tavares, T.M.V. (2007). Filicíneas Permianas permineralizadas da Formação Corumbataí, Nordeste da Bacia do Paraná. Master Dissertation, Universidade Estadual Paulista, Rio Claro, Brasil.         [ Links ]

Tavares, T.M.V., Rohn, R. and Merlotti, S. (2011). Caules permineralizados de Tietea e Psaronius na Bacia do Paraná (Formação Corumbataí, Permiano). Pesquisas em Geociências, v. 38, p. 114-131.         [ Links ]

Washburne, C. W. (1930). Petroleum geology of the State of São Paulo - Brazil. São Paulo, Boletim da Comissão Geográfica e Geológica do Estado de São Paulo, 22, 282p.         [ Links ]