Échinodermes nouveauxdu Cambrien supérieur de la Montagne noire (France méridionale)

Ubaghs, Georges

doi:10.1016/s0016-6995(98)80111-3

Cited by 55 publications

(62 citation statements)

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“…This primarily siliciclastic succession was deposited under transgressive conditions in an offshore environment during the Caesaraugustan and Lower Languedocian. Vizcainoia languedocianus (Ubaghs) comes from deposits of a similar age and environment near Coulouma in the Montagne Noire, southern France [16]. The levels yielding specimens correlate with the Cambrian Series 3, Stage 5 in the Global Stratigraphic System (ca 510 Ma).…”

Section: Methodsmentioning

confidence: 99%

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Cambrian stalked echinoderms show unexpected plasticity of arm construction

Zamora

Smith

2011

Proc. R. Soc. B.

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Feeding arms carrying coelomic extensions of the theca are thought to be unique to crinoids among stemmed echinoderms. However, a new two-armed echinoderm from the earliest Middle Cambrian of Spain displays a highly unexpected morphology. X-ray microtomographic analysis of its arms shows they are polyplated in their proximal part with a dorsal series of uniserial elements enclosing a large coelomic lumen. Distally, the arm transforms into the more standard biserial structure of a blastozoan brachiole. Phylogenetic analysis demonstrates that this taxon lies basal to rhombiferans as sister-group to pleurocystitid and glyptocystitid blastozoans, drawing those clades deep into the Cambrian. We demonstrate that Cambrian echinoderms show surprising variability in the way their appendages are constructed, and that the appendages of at least some blastozoans arose as direct outgrowths of the body in much the same way as the arms of crinoids.

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Section: Methodsmentioning

confidence: 99%

“…Montagne Noire (France). Solenopleuropsis (Solenopleuropsis) Zone, Lower Languedocian, early Middle Cambrian [16].…”

Section: Systematic Palaeontologymentioning

confidence: 99%

Cambrian stalked echinoderms show unexpected plasticity of arm construction

Zamora

Smith

2011

Proc. R. Soc. B.

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“…2). The associated fauna includes echinoderms -the edrioasteroid Protorophus hispanicus Zamora & Smith, 2010, the cinctan Gyrocystis platessa Jaekel, 1918, the stylophoran Ceratocystis sp., two different cothurnocystids and the blastozoans Gogia gondi Ubaghs, 1987, Lichenoididae indet. and Dibrachicystis purujoensis Zamora & Smith, 2012 Zamora & Smith 2010, 2012, polymerid trilobites -Eccaparadoxides pradoanus Verneuil & Barrande (in Prado et al, 1960), Conocoryphe heberti …”

Section: Geological and Stratigraphical Sitesmentioning

confidence: 99%

New and revised occurrences of rhynchonelliformean brachiopods from the middle Cambrian of the Iberian Chains, NE Spain

Mergl¹,

Zamora²

2012

Bull. Geosci.

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New and revised occurrences of rhynchonelliformean brachiopods from the Languedocian (mid-late middle Cambrian) of the Iberian Chains are reported. The oldest assemblage corresponds to a level containing individuals of the new species Brahimorthis alvaroi and Nisusia sp. and is from the lower Languedocian Murero Formation. A younger assemblage is represented by Chilidorthis tecta from the Upper Languedocian Borobia and Torcas Formations. The geographic distribution and morphology of Brahimorthis, Chilidorthis and Bohemiella are reviewed and discussed. Moreover, evidence of the chilidium in Bohemiella and Chilidorthis and familial assignments of Brahimorthis, Saesorthis, Chilidorthis and Bohemiella are discussed. The new family Brahimorthidae fam. nov. is erected.•

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“…Ubaghs & Robison (1988) y Ponticulocarpus Sumrall & Sprinkle, 1999. Los ctenocistoideos son un grupo mucho más cosmopolita que los anteriores por lo que su presencia en nuestro país no es extraña. Se han descrito especies que proceden de Gondwana (Polonia, Bohemia, Francia, Australia) y Laurentia (EEUU y Canadá) (Robison & Sprinkle, 1969;Jell et al, 1985;Ubaghs, 1987;Ubaghs & Robison, 1988;Dzik & Orlowsky, 1995;Fatka & Kordule, 1985). Si se confirma la presencia del género Etoctenocystis en España implicaría cierta afinidad con los ctenocistoideos de Bohemia.…”

Section: Implicaciones Paleobiogeográficasunclassified

Equinodermos del Cámbrico de España: situación actual de las investigaciones y perspectivas futuras

Zamora

2011

Estud. geol.

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RESUMENEn este trabajo se presenta una revisión histórica de todos los equinodermos cámbricos descubiertos en España, desde su primer hallazgo a finales del siglo XIX y las técnicas actuales que se utilizan para su estudio.El muestreo sistemático de nuevas localidades cámbricas del Norte de España y la revisión de otras ya conocidas, ha proporcionado más de 2.000 ejemplares de equinodermos. En total se han reconocido taxones pertenecientes a cinco clases: Cincta, Eocrinoidea, Edrioasteroidea, Stylophora y Ctenocystoidea, que muestran la mayor diversidad para este periodo en Gondwana.Estos hallazgos muestran que los equinodermos alcanzaron su primer pico de diversidad durante el Cámbrico medio. Esto, unido a la amplia distribución paleobiogeográfica de algunos clados, nos advierte de un origen para muchos grupos en el Cámbrico inferior, donde sólo unos pocos taxones han sido descritos a nivel mundial. Por último se dan algunas ideas de hacia dónde se podrían dirigir los esfuerzos en este campo de conocimiento.Palabras clave: equinodermos, Cámbrico, Gondwana, España, revisión, diversidad ABSTRACT This paper reviews all finds of Cambrian echinoderms from Spain since their first discovery in the XIX century. Recent research techniques used for the study of echinoderms are also described, providing a guide for procedure.Sampling in new fossiliferous localities from the Cambrian of North Spain and the review of classic ones has yielded more than 2,000 echinoderm fossils. These include species belonging to five major classes, Cincta, Eocrinoidea, Edrioasteroidea, Stylophora and Ctenocystoidea, which show the highest diversity reported from Gondwana.These results suggest that echinoderms underwent major diversification during the middle Cambrian, with many groups more widely distributed than previously thought. These arguments suggest that many classes originated in the lower Cambrian where only a few taxa have been described. Finally, I offer some suggestions about where research efforts need to be focussed for a better knowledge of Cambrian echinoderm faunas in Gondwana.

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Échinodermes nouveauxdu Cambrien supérieur de la Montagne noire (France méridionale)

Cited by 55 publications

References 1 publication

Cambrian stalked echinoderms show unexpected plasticity of arm construction

Cambrian stalked echinoderms show unexpected plasticity of arm construction

New and revised occurrences of rhynchonelliformean brachiopods from the middle Cambrian of the Iberian Chains, NE Spain

Equinodermos del Cámbrico de España: situación actual de las investigaciones y perspectivas futuras

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