Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4747082 | Cretaceous Research | 2015 | 8 Pages |
Abstract
The small benthic foraminifera Altamirella biscayana n. gen., n. sp. is described from the lower Cenomanian of the Bielba and Altamira formations (North Cantabrian Basin, Spain). Its trochospirally coiled test combines calcitic dark microgranular and fibro-hyaline layers, an arrangement reminiscent of that observed in Palaeozoic Tetrataxidae Galloway. As in Tetrataxis, these layers are built in successive phases and never form a double-layer sensu stricto. The significance of this distinctive wall structure for taxonomy, phylogeny, dispersal, survival and ecology is discussed. A similar wall organization is also observed in some trochospirally coiled Mesozoic forms such as Mohlerina Bucur, Senowbari-Daryan and Abate and might be inherent to epibenthic taxa developing elevated microhabitats.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Palaeontology
Authors
Felix Schlagintweit, Sylvain Rigaud, Markus Wilmsen,