Pennsylvanian brachiopod, fish and conodont faunas from the Caliza Masiva (San Emiliano Formation) at the Mina Profunda area, Cantabrian Zone, NW Spain

DUFFIN, CHRISTOPHER J.; MARTÍNEZ CHACÓN, M. LUISA; ALONSO, JUAN L.; VOLDMAN, GUSTAVO G.; FERNÁNDEZ, LUIS PEDRO

GEOBIOS

ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER

Lugar: Paris; Año: 2020 vol. 59 p. 91 - 106

0016-6995

A rock sampleobtained from the Caliza Masiva of the San Emiliano Formation (Bashkirian?earlyMoscovian) in the Mina Profunda area (NE Villamanín) of the Bodón Nappe (CantabrianZone, NW Spain) has yielded numerous brachiopods and fish remains not frequentlyrepresented in the fossil record. The brachiopod assemblage comprises 13 taxaand is characterized by phosphatic (Langella,Orbiculoidea) as well as exceptionally preserved silicified calciticelements (a small chonetid, Composita,Crurithyris, Lambdarina, and two minute terebratulids) as the main faunal components.Of special importance is the record of the microbrachiopod Lambdarina winklerprinsi nov.sp., which reduces the large Viséan?upper Permian gap in the stratigraphic recordof this genus. Conodont elements recovered from the same insoluble residue areindicative of the upper Bashkirian Idiognathoidessulcatus parvus Zone. The accompanying fish remains consist of chondrichthyanteeth and scales, an acanthodian scale and osteichthyan tooth-bearing bones,isolated teeth and isolated scales, representing the first Pennsylvanianichthyoliths analysed from the Cantabrian Zone. The limestone beds with selectivesilicification in the San Emiliano Formation provide an exceptional opportunityto improve our knowledge on the patterns of life diversity over geological time.