TY  - JOUR
A1  - Caus, Esmeralda
A1  - Parente, Mariano
A1  - Vicedo, Vicent
A1  - Frijia, Gianluca
A1  - Martinez, Ricard
T1  - Broeckina gassoensis sp nov., a larger foraminiferal index fossil for the middle Coniacian shallow-water deposits of the Pyrenean Basin (NE Spain)
JF  - Cretaceous research
N2  - The Upper Cretaceous shallow-water carbonates of the Pyrenean Basin (NE Spain) host rich and diverse larger foraminiferal associations which witness the recovery of this group of protozoans after the dramatic extinction of the Cenomanian-Turonian boundary interval. In this paper a new, large discoidal porcelaneous foraminifer, Broeckina gassoensis sp. nov., is described from the middle Coniacian shallow-water deposits of the Collada Gasso Formation, in the Boixols Thrust Sheet. This is the first complex porcelaneous larger foraminifer of the Late Cretaceous global community maturation cycle recorded in the Pyrenean bioprovince. It differs from the late Santonian-early Campanian B. dufrenoyi for its smaller size in A and B generations and the less developed endoskeleton, which shows short septula. Broeckina gassoensis sp. nov. has been widely employed as a stratigraphic marker in the regional geological literature, under the name of "Broeckina", but its age was so far controversial. Its middle Coniacian age (lowermost part of the Peroniceras tridorsatum ammonite zone), established in this paper by strontium isotope stratigraphy, indicates that it took about 5 My after the Cenomanian-Turonian boundary crisis to re-evolve the complex test architecture of larger foraminifera, which is functional to their relation with photosymbiotic algae and K-strategy.
KW  - Larger Foraminifera
KW  - Biostratigraphy
KW  - Strontium isotope stratigraphy
KW  - Coniacian
KW  - Pyrenees
KW  - Spain
Y1  - 2013
U6  - https://doi.org/10.1016/j.cretres.2013.08.002
SN  - 0195-6671
SN  - 1095-998X
VL  - 45
SP  - 76
EP  - 90
PB  - Elsevier
CY  - London
ER  -