Lower and Middle Devonian species of the genus Bactrocrinites (Crinoidea). Cantabrian Mountains (NW Spain)

Abstract

This paper describes new forms of genus Bactrocrinites of both slopes of the Cantabrian Mountains. Thus in the asturian slope, three found specimens: Bactrocrinites longibrachiatus n. sp., Bactrocrinites aff. fusiformis and Bactrocrinites sp., they were gathered, respectively, in the Punta del Aguión, near Luanco, Aguión Formation (Upper Emsian); in the Cove of Moniello, Moniello Formation (Upper Emsian) and in the locality of Arbeyales, Santa Lucía Formation (Lower Eifelian). In the leonian slope: Bactrocrinites breimeri n. sp., Bactrocrinites truyolsi n. sp., a second form of Bactrocrinites aff. fusiformis and ? Bactrocrinites sp.; they were collected as well, first in Huergas de Gordón, Pola de Gordón, Portilla Formation (Givetian), the second also in the same locality, Santa Lucía Formation (Lower Eifelian), the third in Valporquero, Valle de Torío, La Vid Group (Upper Emsian) and the last in Colle, La Vid Group (Upper Emsian). All the specimens gathered and described in the present work are relatively small and slender and show to remarkable affinities with the type species fusiformis.