First hexactinellid spicules from the Late Cambrian olitofish of the Los Sombreros Formation, Tontal Range, San Juan Precordillera, Argentina

Autores/as

  • Matilde S. Beresi IANIGLA. Departamento de Paleontología CRICYT, C.C. 131, Mendoza, Argentina
  • Aldo L. Banchig Instituto de Geología, Universidad Nacional de San Juan, San Juan, Argentina

DOI:

https://doi.org/10.7203/sjp.24015

Palabras clave:

Hexactinellid spicules, Cambrian, Ordovician, Precordillera, Western Argentina

Resumen

A moderately diverse fauna of hexactinellid sponges is described from one Late Cambrian olitofish of the Los Sombreros Formation from Tres Saltos Gulch in the Tontal Range, Western Precordillera, San Juan Province. Argentina. Protospongia sp., Diagoniella? Sp., Kiwetinokia, anchoring spicules, prodiaenes, diagonally arranged spicules and root tuft are present.

The preservation degree of the spicules and the patterns allow us to presume that after their death, they were transported not very far from the original sponges oases. The Cambrian oolitic grainstone limestone with spicules conform an olitofish which was transported and resedimented during the Ordovician by gravity flows within a pelitic matrix of the terrigenous-carbonate talus of the Los Sombreros Formation.

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Publicado

2022-03-01

Cómo citar

Beresi, M. S., & Banchig, A. L. (2022). First hexactinellid spicules from the Late Cambrian olitofish of the Los Sombreros Formation, Tontal Range, San Juan Precordillera, Argentina. Spanish Journal of Palaeontology, 12(2), 141–150. https://doi.org/10.7203/sjp.24015
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