Praealveolina (Foraminifera) species; a tool to date Cenomanian platform sediments

Stepwise extinction of larger foraminifers at the Cenomanian-Turonian boundary: A shallow-water perspective on nutrient fluctuations during Oceanic Anoxic Event 2 (Bonarelli Event)

“…However, when high-resolution dating is available, it can be demonstrated that a fi rst extinction event, eliminating the alveolinids and many other species, occurred in the geslinianum zone. This event can be documented from the Vergons Platform in southern France (Grosheny and Tronchetti, 1993), the Pyrenees and Iberian Range in Spain (Calonge et al, 2002), and the southern Apennines (this paper). Moreover, a second event, eliminating the few survivors (P. dubia, P. reicheli, and C. gradata), is recorded in other platforms that survived drowning in the late Cenomanian (e.g., central Apennines platforms; Chiocchini et al, 1994;Gavrovo Platform, Greece;Fleury, 1971).…”

New Alveolinoidea (Foraminifera) from the Cenomanian of Oman

“…is the Alveolinoidea (superfamily Alveolinoidea Ehrenberg, 1839). The Late Cretaceous alveolinoids of the Caribbean and western Tethys paleobioprovinces are well known (see Reichel, 1933Reichel, , 1937Reichel, , 1941Reichel, , 1947Colalongo, 1963;Pêcheux, 1984Pêcheux, , 2002Schroeder and Neumann, 1985;Hottinger et al, 1989;Fleury and Fourcade, 1990;Calonge et al, 2002;Vicedo et al, 2009Vicedo et al, , 2013Vicedo and Serra-Kiel, 2011 among others), but the representative of this group in the south and southwest margin of the Tethys call for detailed architectural studies.…”

Cenomanian Rhapydioninids (Foraminiferida): Architecture of the Shell and Stratigraphy

“…were nearly concurrent. Both appear in the same stratigraphical unit, the Chera Formation, which has been correlated with strata containing ammonites indicative of the Mantelliceras saxbii subzone or the upper part of M. mantelli zone and immediately below the first appearance of Praealveolina iberica (Calonge, 1989). The species Sellialveolina viallii and S. quintanensis n. sp.…”

“…1), where Cenomanian shallow-water deposits form a complete sedimentary record sequence that enables sellialveolines to be placed in detailed stratigraphical context (Calonge, 1989;Caus and others, 2009 (Caus and others, 2009). These sellialveolines were identified as Sellialveolina viallii or Pseudedomia vialli (Fourcade and García, 1982;Calonge, 1989;Martín-Chivelet, 1993;Calonge and others 2002;Caus and others, 2009 These sellialveolines are referred to in the regional literature as Sellialveolina drorimensis or Pseudedomia drorimensis (e.g., Calonge, 1989) or S. aff. drorimensis (Caus and others, 2009) and have been dated as middle Cenomanian (Calonge and others, 2002;Caus and others, 2009).…”