Artículo
New reticulosan sponges from the middle Cambrian of Sonora, Mexico
Fecha de publicación:
11/2017
Editorial:
Polish Academy of Sciences. Institute of Paleobiology
Revista:
Acta Palaeontologica Polonica
ISSN:
0567-7920
e-ISSN:
1732-2421
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A small assemblage of extremely well-preserved fragments of new sponges has been discovered in calcipelites of the middle Cambrian El Mogallón Formation in the Cerro El Mogallón section, near Arivechi in eastern Sonora, Mexico.The assemblage includes two new reticulosan species referred to Ratcliffespongia arivechensis sp. nov. and Valospongia sonorensis sp. nov., combined with disarticulated remains assigned to Kiwetinokia and additional, currently unidentifiable taxa. The new species represent the first records of these Cambrian genera from Mexico, although they are widelydistributed at low latitudes, being previously best known from Utah but extending through Laurentia and South China.This middle Cambrian fauna indicates that there was considerable continuity of the deeper-water hexactinellid sponges between the warm peri-platform of Laurentia and the peri-continental Cambrian platform of Sonora. The new materialsupports the impression of the extremely wide distribution of Cambrian sponge genera, with local diversification at species level within regions, in contrast to much greater generic-level endemism during the Ordovician Period.
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Articulos(IANIGLA)
Articulos de INST. ARG. DE NIVOLOGIA, GLACIOLOGIA Y CS. AMBIENT
Articulos de INST. ARG. DE NIVOLOGIA, GLACIOLOGIA Y CS. AMBIENT
Citación
Beresi, Matilde Sylvia; Botting, Joseph; Palafox, Juan J.; Buitron Sanchez, Blanca E.; New reticulosan sponges from the middle Cambrian of Sonora, Mexico; Polish Academy of Sciences. Institute of Paleobiology; Acta Palaeontologica Polonica; 62; 4; 11-2017; 691-703
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