A new Permian temnospondyl with Russian affinities from South America, the new family Konzhukoviidae, and the phylogenetic status of Archegosauroidea

Pacheco, Cristian Pereira; Eltink, Estevan; Müller, Rodrigo Temp; Dias‐da‐Silva, Sérgio

doi:10.1080/14772019.2016.1164763

Cited by 25 publications

(31 citation statements)

References 61 publications

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“…This author described interpterygoid vacuities 13.7 cm long in a skull of 50 cm in length (UFRGS-PV-0227-P). The interpterygoid vacuities of UFPR 0199 PV have a total width of 4 cm, which corresponds to less than 90% of their length as in Konzhukovia gabrielensis (Pacheco et al, 2017). This pattern of longer than wide interpterygoid vacuities is also found in A. cosgriffi (Eltink et al, 2015).…”

Section: General Skull Aspectmentioning

confidence: 72%

“…In this specimen the anterior edge of the cultriform process is inserted between the vomers, as in other described A. cosgriffi specimens as well as in other rhinesuchids (Schoch & Milner, 2000), but it surpasses the level of the posterior border of the choanas, being interposed between them. This condition is unprecedented for A. cosgriffi, and it is also observed in Mastodonsaurus giganteus, Konzhukovia vetusta and K. sangabrielensis (Pacheco et al, 2017). The parasphenoid borders the oval and elongated interpterygoid vacuities medially for its full extension.…”

Section: General Skull Aspectmentioning

confidence: 95%

“…Vertebrates, invertebrates, plants and ichnofossils have already been recorded from these strata (Barberena & Daemon, 1974;Langer, 1998;Barberena & Dias, 1998;Lee, 1997;Barberena, 1998;Richter & Langer, 1998;Dias & Barberena, 2001;Dias & Kroeff, 2002;Leonardi et al, 2002;Malabarba et al, 2003;Cisneros et al, 2005;Dias & Schultz, 2003;, 2011Cisneros et al, 2011;Ramos & Vega, 2011;Souza & Vega, 2011;Pauliv et al, 2012;Silva et al 2012;Cisneros et al, 2012;Dentzien-Dias et al, 2012;Boos et al, 2013;Eltink & Langer, 2014;Strapasson et al, 2015;Pauliv et al, 2014;Eltink et al, 2015;Boos et al, 2015;Boos, et al, 2016;Pacheco et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…An indeterminate Temnospondyli lower jaw (Malabarba et al, 2003) and a Melosaurinae incomplete skull (Dias-da-Silva, 2012) were also found in Rio Grande do Sul. Also from this region comes Konzhukovia sangabrielensis Pacheco et al, 2017, a member of the Konzhukovidae family, with close relationships to Russian forms, and the first temnospondyl from Santa Catarina State, the Stereospondylomorpha Parapytanga catarinensis Strapasson et al, 2015, was recently described. Most of these temnospondyl records from the Rio do Rasto Formation, as well as global ones, consist of cranial and mandibular remains.…”

Section: Introductionmentioning

confidence: 99%

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A new specimen of Australerpeton cosgriffi Barberena, 1998 (Stereospondyli: Rhinesuchidae) from the Middle/Upper Permian Rio do Rasto Formation, Paraná Basin, Brazil

Azevedo¹,

Vega²,

Soares³

2017

Rev. bras. paleontol.

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-Here we present a skull and a lower jaw of a temnospondyl specimen collected from the São Jerônimo da Serra Site, an exposure of the Morro Pelado Member of the Rio do Rasto Formation (Middle/Upper Permian, Paraná Basin), Paraná State of southern Brazil. The sedimentary environment in which the fossil was preserved is characterized by a massive reddish mudstone derived from the slow deposition of fine sediments from suspended load in a terminal splay or ephemeral lake setting. The comparative anatomical description of the new specimen allows its assignment to the rhinesuchid Australerpeton cosgriffi Barberena. The new specimen represents the most complete skull and lower jaw of this species found up to date. Its high degree of ossification associated with its large skull size (58 cm long) indicates that it was a mature adult. This work, besides confirming several anatomical characteristics of A. cosgriffi, reveals previously unknown information about this species: a long cultriform process whose anterior edge surpasses the level of the posterior border of the choanas, being interposed between them; and a pair of longitudinal ridges lacking denticles that run parallel along the premaxillary surface without making contact with the choanae. These features were not reported before in the smaller known skulls of A. cosgriffi because they likely develop late in the ontogeny of this species. This new find provides evidence that this unique long-snouted rhinesuchid was a common and successful faunal component of the Middle-Late Permian fluvio/lacustrine ecosystems of southern Brazil, and reaffirms the Rio do Rasto Formation of Brazil as a rich source of information concerning the initial diversification of the Stereospondyli. Key words:Australerpeton cosgriffi, Temnospondyli, Rhinesuchidae, Permian, Rio do Rasto Formation.RESUMO -O trabalho apresenta um novo espécime de temnospôndilo que consiste em um crânio e uma hemimandíbula esquerda. O fóssil foi coletado no afloramento São Jerônimo da Serra, vinculado ao Membro Morro Pelado da Formação Rio do Rasto (Permiano Médio/ Superior, Bacia do Paraná), do Estado do Paraná, Brasil. O ambiente sedimentar no qual o fóssil foi preservado é caracterizado por pelitos maciços avermelhados gerados pela deposição de finos em suspensão, representando espraiamentos terminais e lagos efêmeros. A comparação detalhada do material permitiu a sua atribuição ao rinessuquídeo Australerpeton cosgriffi Barberena. O novo espécime representa os mais completos crânio e mandíbula já encontrados para esta espécie. O seu alto grau de ossificação associado ao grande tamanho craniano (58 cm de comprimento) indica tratar-se de um adulto pleno. Este trabalho, além de confirmar várias características anatômicas de A. cosgriffi, fornece informações inéditas para esta espécie, quais sejam: um longo processo cultriforme cuja extremidade anterior ultrapassa o nível da borda posterior das coanas, ficando interposto entre elas; um par de cristas longitudinais sem dentículos que correm paralelamente na...

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Section: General Skull Aspectmentioning

confidence: 72%

Section: General Skull Aspectmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A new specimen of Australerpeton cosgriffi Barberena, 1998 (Stereospondyli: Rhinesuchidae) from the Middle/Upper Permian Rio do Rasto Formation, Paraná Basin, Brazil

Azevedo¹,

Vega²,

Soares³

2017

Rev. bras. paleontol.

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“…The fossiliferous outcrops of the Rio do Rasto Formation provide some of the most important continental records of the Middle/Late Permian in South America ). Among vertebrates, temnospondyl amphibians (Barberena & Daemon 1974, Barberena 1998, Barberena & Dias 1998, Dias & Barberena 2001, Dias & Kroeff 2002, Dias & Schultz 2003, Malabarba et al 2003, Ramos & Vega 2011, Souza & Vega 2011, Azevedo et al 2012, Strapasson et al 2015, Eltink et al 2016, Pacheco et al 2017), a pareiasaur (Araújo 1985a, 1985b, Lee 1997, Malabarba et al 2003, Cisneros et al 2005, a basal anomodont , two dicynodonts (Barberena & Araújo 1975, Boos et al 2013, Boos et al 2016, carnivore and herbivores dinocephalians (Langer 1998, 2000, Boos et al 2015 and fishes (Richter & Langer 1998, Malabarba et al 2003, Pauliv et al 2012, Pauliv et al 2014) have been reported. Invertebrates and plants, besides ichnofossils (tetrapod tracks) and coprolites, have also been reported (Rohn 1994, Rohn & Rösler 2000, Ferreira-Oliveira 2007, Leonardi et al 2002, Silva et al 2012, Dentzien-Dias et al 2012.…”

Section: Introductionmentioning

confidence: 99%

The São Jerônimo da Serra Site, Rio do Rasto Formation (Middle/Upper Permian), Paraná Basin, Brazil: faciological and taphonomic context

et al. 2018

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In this contribution, we present an analysis of the main faciological features of the São Jerônimo da Serra Site, related to the Morro Pelado Member of Rio do Rasto Formation (Middle/Upper Permian), from Paraná State, Brazil, integrated to its taphonomic context. The outcrop, rich in vertebrates and bivalves remains, presents a succession of red siltstones bedded with fine to medium sandstones in which three architectural elements were observed: SF (sheetflood deposits), FF (fine of flood plain) and CS (crevasse). These data, allied to the taphonomic signatures of fossils assigned to eight levels, allowed the identification of three taphofacies. The taphofacies I is characterized by preserved bones in floodplain facies, with different articulation grades and absence of any sign of transport. The taphofacies II is composed by small isolated or fragmented bones and fish scales deposited in terminal splay facies. The taphofacies III is characterized by sandy layers with bivalve shells and fish scales, preserved in crevasse-splay deposits. The obtained data shows that the studied sedimentary succession was generated on a dry trend environment, with sporadic water supply, which conditioned the fossil preservation.

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Interrelationships among Early Triassic faunas of Western Gondwana and Laurasia as illuminated by a new South American benthosuchid temnospondyl

Pinheiro,

Eltink,

Paes‐Neto

et al. 2024

The Anatomical Record

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The End‐Permian Mass Extinction marked a critical turning point in Earth's history, and the biological recovery that followed the crisis led to the emergence of several modern vertebrate and invertebrate taxa. Even considering the importance of the Early Triassic biotic recovery for the evolution of modern faunas and floras, our knowledge of this event is still hindered by the sparse sampling of crucial geological formations. This leaves our understanding of Early Triassic ecosystems fundamentally biased toward productive and historically well‐explored geological units. Recent surveys in poorly known Gondwanan localities, such as those within the Sanga do Cabral Formation in southern Brazil, have unveiled insights into Early Triassic terrestrial ecosystems, shedding light on a diverse and previously unknown tetrapod fauna. Here, we report the discovery of a new temnospondyl genus and species in the Lower Triassic Sanga do Cabral Formation. The new taxon can be confidently assigned to the Benthosuchidae, a stereospondyl clade with a distribution previously restricted to the East European Platform. Phylogenetic analysis confirms the relationship of the new genus to the trematosaurian lineage, being closely related to the genus Benthosuchus. Our results raise questions about the biogeographical history of stereospondyls after the End‐Permian Mass Extinction and suggest a potential connection between Russian and South American Early Triassic faunas. Further investigations are needed to thoroughly explore the potential dispersal routes that may explain this seemingly unusual biogeographical pattern.

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A new Permian temnospondyl with Russian affinities from South America, the new family Konzhukoviidae, and the phylogenetic status of Archegosauroidea

Cited by 25 publications

References 61 publications

A new specimen of Australerpeton cosgriffi Barberena, 1998 (Stereospondyli: Rhinesuchidae) from the Middle/Upper Permian Rio do Rasto Formation, Paraná Basin, Brazil

A new specimen of Australerpeton cosgriffi Barberena, 1998 (Stereospondyli: Rhinesuchidae) from the Middle/Upper Permian Rio do Rasto Formation, Paraná Basin, Brazil

The São Jerônimo da Serra Site, Rio do Rasto Formation (Middle/Upper Permian), Paraná Basin, Brazil: faciological and taphonomic context

Interrelationships among Early Triassic faunas of Western Gondwana and Laurasia as illuminated by a new South American benthosuchid temnospondyl

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