Jonoichthys challwa gen. et sp. nov., a new Aspidorhynchiform (Osteichthyes, Neopterygii, Teleosteomorpha) from the marine Upper Jurassic sediments of Argentina, with comments about paleobiogeography of Jurassic aspidorhynchids
Aspidorhynchiformes as a whole are incompletely understood. Here, a new aspidorhynchiform, Jonoichthys challwa gen. et sp. nov., is described based on a single three-dimensionally preserved specimen recovered from Upper Jurassic marine rocks of the Vaca Muerta Formation, Neuquén, southern Argentina....
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/53596 |
| Acceso en línea: | http://hdl.handle.net/11336/53596 |
| Access Level: | acceso abierto |
| Palabra clave: | Aspidorhychiformes Gondwana Neopterygii Paleobiogeography South America Taxonomy Tithonian https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
| Sumario: | Aspidorhynchiformes as a whole are incompletely understood. Here, a new aspidorhynchiform, Jonoichthys challwa gen. et sp. nov., is described based on a single three-dimensionally preserved specimen recovered from Upper Jurassic marine rocks of the Vaca Muerta Formation, Neuquén, southern Argentina. The new taxon is based on a unique combination of characters (e.g., large skull roof plate composed by the fusion of certain bones; 'L'-shaped preoperculum with a single main preopercular sensory canal that lacks sensory tubules; three predentary tooth rows; an accessory cusp in the teeth of the median predentary tooth row, and a robust and deep body). It is expected that the morphological information provided here could be useful to further understanding of aspidorhynchiform phylogeny and Neuquén Basin biodiversity. |
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