Fenestrate Bryozoa of the Moniello Formation (Lower-Middle Devonian, NW Spain)

Abstract

Lower-Middle Devonian non-fenestellid fenestrate bryozoans of NW Spain are reported, from two coastal sections of the upper Emsian-lower Eifelian Moniello Formation, the type locality at Moniello Inlet and at Arnao. Eighteen species of non-Fenestellidae fenestrates belonging to thirteen genera and six families have been identified; nine species are new: Bashkirella arnaoense, Utropora parva, Bigeyina cantabrica, B. spinosa, Fenestrapora elegans, Paraseptopora geometrica, P. irregularis, Kalvariella antiqua and Filites robustus. Fenestrates described herein, together with earlier reported taxa of the Family Fenestellidae from the Moniello Formation show palaeobiogeographic affinities with those of neighbouring Gondwanan regions, especially with Bohemia, but also with Middle Devonian assemblages from Eastern North America. The fenestrate fauna from NW Spain comprises seven species common with the Lower Devonian of the Prague Basin (Bohemia, Czech Republic) and genera with relatively limited geographic distributions, such as Utropora and Filites. A remarkable feature of the studied fauna is the presence of several species that represent the earliest and westernmost reported occurrence of their genera, Bashkirella, Paraseptopora and Kalvariella, as well as previously reported Cavernella asturica. The occurrence of these species together with the stratigraphic and geographic position of previously reported ones indicate the existence of large gaps in the distribution of these Lazarus genera.•

Stratigraphic and paleogeographic distributions of Devonian crinoids from Spain with description of new taxa from the Iberian Chains

“…Unlike the bryozoans described by Suárez Andrés and Wyse Jackson (2017), the upper Emsian crinoid faunas are dominantly endemic to Spain. Only 27% (3 of 11) of the crinoid species from the Moniello Formation co-occur in Germany (e.g., Amblacrinus rosaceus [Roemer, 1844], Gasterocoma antiqua Goldfuss, 1839, and Halocrinus nodosus [Sandberger and Sandberger, 1856]).…”

“…Only 27% (3 of 11) of the crinoid species from the Moniello Formation co-occur in Germany (e.g., Amblacrinus rosaceus [Roemer, 1844], Gasterocoma antiqua Goldfuss, 1839, and Halocrinus nodosus [Sandberger and Sandberger, 1856]). None occurs beyond the Rhenish-Bohemian Province of the Old World Realm (see Boucot et al, 1967, 1969; Suárez Andrés and Wyse Jackson, 2017). Similarly, only 7% (2 of 27) of species in the Santa Lucia Formation occur outside Spain (three from Germany and one from Laurentia).…”

Palaeoecology and palaeobiogeographic relationships of Lower Devonian bryozoans from the Guadámez and Peñón Cortado Sections of Sierra Morena (SW Spain)

“…Rodríguez et al (2010) described the reefal processes shown in the Guadámez-2 section. In contrast to the bryozoan faunas of SW Spain, those from the Lower-Middle Devonian of NW Spain were more intensively studied in a series of publications in more than two last decades (Suárez Andrés, 1998, 1999a, 1999b, 1999c, 2014Suárez Andrés & González Álvarez, 2000;Suárez Andrés & McKinney, 2010;Ernst, 2010Ernst, , 2011Ernst, , 2012Ernst et al, 2011Ernst & Buttler, 2012;Suárez Andrés & Ernst, 2015;, 2021, 2017, 2018Sendino et al, 2019). These studies show the high diversity and richness of bryozoans in the Lower to Middle Devonian sediments of Spain.…”