| dc.contributor.author | Robles-Salcedo, Raquel | ca |
| dc.contributor.author | Vicedo, Vicent | ca |
| dc.contributor.author | Parente, Mariano | ca |
| dc.contributor.author | Caus, Esmeralda | ca |
| dc.contributor.other | Consorci del Museu de Ciències Naturals de Barcelona | ca |
| dc.date.accessioned | 2025-11-05T13:08:08Z | |
| dc.date.available | 2025-11-05T13:08:08Z | |
| dc.date.issued | 2018 | |
| dc.description | During the latest Cretaceous, many representatives of the larger benthic foraminifera (LBF) community reached a high level of “maturation”, developing large-sized shells with complex architectures. Increasing size and complexity in a relatively short period of time can be interpreted as a rapid response to biologic competition for space and resources with other LBF (like for instance fabularids, lacazinids, alveolinids, rotaliids, orbitoidids) in the shallow carbonate to mixed carbonate-clastic platforms.
A paradigm of this type of fast evolution is the group of the Siderolitidae, lamellar-perforate LBF with a complex canal system that were abundant in shallow-water platforms during the late Cretaceous (Campanian-Maastrichtian). Five genera have been described up to now that represent five different steps of evolution in terms of complexity: Arnaudiella, Praesiderolites, Pseudosiderolites, Wannierina and Siderolites. In broad terms, the species ascribed to these genera replace each other in time, offering a good tool for high resolution biostratigraphy. Recent studies on material from the late Maastrichtian of Italy have yielded a siderolitid with a singular architectural pattern that differs from its relatives. The new morphotype has a very large test with large canaliferous spines and a very complex enveloping canal system. This new morphotype is the youngest siderolitid known so far. Strontium isotope stratigraphy indicates a late Maastrichtian age of 66.4 ±1.5 Ma, very close to the K-Pg boundary. The large size and very high complexity shown by the new morphotype are in accordance with the general evolutionary trends of LBF. | |
| dc.format | application/pdf | ca |
| dc.format.extent | 1 p. | ca |
| dc.identifier | http://hdl.handle.net/2072/368449 | |
| dc.identifier.citation | International Symposium on Foraminiferal: FORAMS 2018 (17-22 June 2018) | ca |
| dc.identifier.entitat | consorcis | ca |
| dc.identifier.uri | http://hdl.handle.net/11703/120711 | |
| dc.language | eng | ca |
| dc.provenance | Recercat (Dipòsit de la Recerca de Catalunya) | ca |
| dc.subject | Foraminífers fòssils | ca |
| dc.subject | Cretaci | ca |
| dc.subject | Itàlia | ca |
| dc.subject.category | Ciència i tecnologia | ca |
| dc.subject.forma | material gràfic | ca |
| dc.title | A new siderolitid from the late Maastrichian of Italy | |
| dc.type | info:eu-repo/semantics/conferenceObject | |
| metadadalocal.dependencia | 8008920 | |