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A new squamate lizard from the Upper Cretaceous Adamantina Formation (Bauru Group), São Paulo State, Brazil
Nava, William R; Martinelli, Agustín G.
  • Nava, William R; s.af
  • Martinelli, Agustín G; s.af
An. acad. bras. ciênc ; 83(1): 291-299, Mar. 2011. ilus
Article in English | LILACS | ID: lil-578296
ABSTRACT
The record of non-mosasaur squamates (Reptilia, Squamata) is sparse in the Cretaceus fossil record of Brazil and include six putative reports, three from the Aptian-Albian of the Araripe Basin (Tijubina pontei Bonfim-Júnior and Marques, Olindalacerta brasiliensis Evans and Yabumoto, and a lizard indet.) and three from the Upper Cretaceous of the Bauru Group (Pristiguana brasiliensis Estes and Price, Anilioidae gen. et sp. indet., and Squamata gen. et sp. indet.). In this contribution, a new genus and species of lizard, Brasiliguana prudentis gen. et sp. nov., is described based on an isolated left maxilla with teeth. The material was discovered in an outcrop of the Upper Cretaceous Adamantina Formation (Bauru Group) located in the proximity of Presidente Prudente Municipality, São Paulo State, Brazil. The new taxon is considered a basal non-Priscagamidae+Acrodonta iguanian based on the presence of a weakly inclined anterior margin of the maxillary nasal process and maxillary tooth shape and tooth implantation similar to that of iguanians rather than of other lizard groups (e.g. teiids). This finding significantly increases the squamate lizard diversity of South America, which is still poorly understood and sparsely represented in the fossil record.
RESUMO
Os achados de escamados (Reptilia, Squamata) são escassos no Cretáceo do Brasil, incluindo cinco registros pontuais, dois do Aptiano-Albiano da Bacia do Araripe (Tijubina pontei Bonfim-Júnior e Marques e Olindalacerta brasiliensis Evans e Yabumoto), e três do Cretáceo Superior do Grupo Bauru (Pristiguana brasiliensis Estes and Price, Anilioidae gen. et sp. indet., Squamata gen. et sp. indet.). Nesta contribuição apresentamos um novo gênero e espécie de lagarto, Brasiliguana prudentis, baseado numa maxila esquerda com dentição. O material provém de depósitos da Formação Adamantina aflorantes próximos a cidade de Presidente Prudente, Estado de São Paulo, Brasil. O novo táxon é considerado um iguanídeo não-Priscagamidae+Acrodonta baseado na presença de uma margem anterior do processo nasal do maxilar pouco inclinada e na morfologia maxilar e dentaria mais semelhante à de outros iguanideos que a outros grupos de lagartos (ex. teiídeos). A presente descoberta aumenta a diversidade de lagartos escamados na América do Sul onde o registro fóssil é ainda raro.
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Full text: Available Index: LILACS (Americas) Main subject: Paleodontology / Fossils / Lizards / Mandible Limits: Animals Country/Region as subject: South America / Brazil Language: English Journal: An. acad. bras. ciênc Journal subject: Science Year: 2011 Type: Article / Congress and conference

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Full text: Available Index: LILACS (Americas) Main subject: Paleodontology / Fossils / Lizards / Mandible Limits: Animals Country/Region as subject: South America / Brazil Language: English Journal: An. acad. bras. ciênc Journal subject: Science Year: 2011 Type: Article / Congress and conference