0000000000854560
AUTHOR
Juan Bautista Chirivella Martorell
150 years of the discovery of the Cambrian Lagerstätte of Murero (Cadenas Ibéricas, NE Spain)
El yacimiento paleontológico del Cámbrico inferior-medio de Murero (Cadenas Ibéricas, NE de España) es una localidad clásica del Cámbrico europeo. Fue dado a conocer a la ciencia por Edouard de Verneuil en 1862, celebrándose en 2012 el 150 aniversario de su descubrimiento. Es un siglo y medio de trabajos geológicos y de logros puestos al servicio del conocimiento del Período Cámbrico. Murero es un Lagerstätte excepcional porque coexisten en él grupos esqueléticos y de cuerpo blando a lo largo de un registro estratigráfico continuo que abarca unos 8 millones de años, dividido en 14 zonas de trilobites. En 1997, este yacimiento paleontológico fue el primero de España en obtener de la Administ…
Proposal of a reference section and point for the Cambrian Series 2-3 boundary in the Mediterranean subprovince in Murero (NE Spain) and its intercontinental correlation
The classical lower-middle Cambrian boundary is approximately equivalent with the boundary of the Cambrian Series 2 and 3, which is now in the process of definition by the International Subcommission on Cambrian Stratigraphy. Currently, there are two oryctocephalid trilobite species first appearance data (FAD) that are suggested as possible markers of this level: Ovatoryctocara granulata Tchernysheva, 1962 and Oryctocephalus indicus (Reed, 1910), respectively. Until now neither of these two species has been recorded in the Mediterranean subprovince or Baltica. As a result, in these regions a level potentially correlating with either the FAD of Ovatoryctocara granulata or Oryctocephalus indi…
Systematic and biostratigraphy of the genera Parasolenopleura, Badulesia, and Pardailhania in the Iberian Chains: a useful zonation for the Miaolingian Series (former middle Cambrian) in the Mediterranean region
The trilobite species of three genera included in the Family Solenopleuridae: Parasolenopleura , Badulesia , and Pardailhania are revised. These genera have a great biostratigraphic interest due to their broad distribution in the Miaolingian Series (former middle Cambrian) of the Mediterranean Subprovince and because they constitute an evolutionary lineage, that facilitates an accurate regional correlation. Two of these genera ( Pardailhania and Badulesia ) have been used to define middle Cambrian zones in Spain (lower and middle Caesaraugustan, equivalent to the uppermost Wuliuan and the lower Drumian stages). Although, all authors have been using the same species to establish the Mediterr…
El género Parabailiella Thoral, 1946 (Trilobita) en el Cámbrico Medio de las cadenas ibéricas (NE de España)
Se analiza el registro del género Parabailiella Thoral, 1946 en el Cámbrico medio de las Cadenas Ibéricas, al tiempo que se identifican y describen por primera vez en la región las cuatro especies que previamente se habían incluido en este género. La mayoría de las especies se encuentran registradas en varias secciones y las cuatro se han identificado en la sección Jarque 1. La distribución bioestratigráfica del género abarca desde el Leoniense medio hasta la base del Caesaraugustiense superior, lo que equivale en la escala propuesta por la International Subcommission on Cambrian Stratigraphy (ISCS) a la mayor parte del Piso 5 del Cámbrico y a la parte inferior del Piso Drumiense. La distri…
The first record ofDinesus(Trilobita, Dinesidae) in the Cambrian of the Mediterranean region
An important problem facing inter-regional correlation in the Cambrian is the scarcity of shared taxa between different palaeogeographic domains. Currently, species of the Corynexochida are proposed as tools to define the base of Cambrian Series 3. However, few Mediterranean Corynexochida species are known. A specimen of Dinesus truyolsi comb. nov. from the middle Cambrian of Spain represents the first record of this genus in the Acadobaltic province. Erbia and Tingyuania are accepted as junior subjective synonyms of Dinesus, and we now recognize 22 species within this genus. Dinesus has been found previously in lower to middle Cambrian strata of Australia, Russia, Kazakhstan, North America…
Bailiaspis (Trilobita) with English affinities from the Mansilla Formation (Cambrian Series 3 of the Iberian Chains; NE Spain)
A new study of the trilobite record in the Mansilla Formation (Iberian Chains, NE Spain) has led to the discovery of the presence of Bailiaspis aff. tuberculata, B. cf. tuberculata and Bailiaspis sp., the first certain citation of this genus in the Mediterranean subprovince. The age of the findings extends from Eccaparadoxides asturianus Zone (upper Leonian) to the lowermost Badulesia tenera Zone (lower Caesaraugustan), which correspond to the upper part of Stage 5 of Cambrian Series 3 and, probably, the lowermost Drumian. The specimens show the cranidial anterior border expanding backwards, forming a plectrum that is characteristic of Bailiaspis. The main characters of the three taxa inclu…
A blind trilobite with Baltic affinities from Cambrian Series 3 of the Iberian Chains, Spain, and its stratigraphical and palaeobiogeographical significance
Three cranidia of a conocoryphid trilobite are described from the lower Caesaraugustan Regional Stage (upper part of provisional Cambrian Stage 5 within Cambrian Series 3) in the Iberian Chains, Spain. The material is from the upper part of the Mansilla Formation and the base of the overlying Murero Formation. It closely resembles Bailiella tenuicincta (Linnarsson, 1879), which has previously been described from the Ptychagnostus gibbus (Cambrian Stage 5) and lower P. atavus zones (lower Drumian Stage) of Baltica (Sweden and Bornholm), and from the P. atavus Zone of West Avalonia (Newfoundland). The record of B. cf. tenuicincta from the Mediterranean margin of West Gondwana provides additio…
150 years of the discovery of the Cambrian Lagerstätte of Murero (Cadenas Ibéricas, NE Spain).
The classical, lower and middle Cambrian Lagerstiitte of Murero (NE Spain) was first reported by the French geologist Edouard de Verneuil in 1862, and now it achieves 150 years of geological works. In this paper the main stratigraphical and palaeontological characteristics of the site are given. Murero is exceptional because the coexistence of both skeletal and soft - bodied groups along a continuous record of ca. 10 million years, which is subdivided into 14 trilobite biozones. The educational and social interest of the site is also highlighted.
THE DEMOSPONGE GENUS LEPTOMITUS and A NEW SPECIES FROM THE MIDDLE CAMBRIAN OF SPAIN
Forty-five specimens of Leptomitus conicus sp. nov. have been collected from the base of the Murero Formation (Caesaraugustan, Middle Cambrian) in the Murero area of Zaragoza, north-east Spain. The new species is a small obconical sponge, which has coarse oxeas forming parallel rods that run the whole length of the specimens in the man- ner typical of the genus. The biostratigraphy and facies of the levels with Leptomitus conicus have been analysed. Palaeoeco- logical information derived from associated trilobites, brachio- pods and ichnofossils shows that L. conicus lived in a soft substrate of a sublittoral environment of low to low ⁄ moderate energy. According to established Cambrian pal…
150 años del descubrimiento del yacimiento cámbrico de Murero (Cadenas Ibéricas, NE España).
The lower-middle Cambrian palaeontological site of Murero (Cadenas Ibéricas, NE Spain) is a classical locality of the Cambrian in Europe. The site was first reported by the French geologist Edouard de Verneuil in 1862, and now it achieves 150 years of geological works contributing to a better knowledge of the Cambrian Period. Murero is an exceptional Lagerstätte because the coexistence of both skeletal and soft-bodied groups along a continuous record of ca. 8 million years, which is subdivided into 14 trilobite zones. Murero was the first palaeontological site in Spain to obtain the highest protection figure (Bien de Interés Cultural, BIC) from the Spanish Administration in 1997. Since then…