LATE JURASSIC AND EARLY CRETACEOUS UNCOILED AMMONITES - TROPHISM-RELATED EVOLUTIONARY PROCESSES

Authors
CECCA F
Citation
F. Cecca, LATE JURASSIC AND EARLY CRETACEOUS UNCOILED AMMONITES - TROPHISM-RELATED EVOLUTIONARY PROCESSES, Comptes rendus de l'Academie des sciences. Serie II. Sciences de la terre et des planetes, 325(8), 1997, pp. 629-634
Citations number
29
Categorie Soggetti
Geosciences, Interdisciplinary
Journal title
Comptes rendus de l'Academie des sciences. Serie II. Sciences de la terre et des planetes → ACNP
ISSN journal
12518050
Volume
325
Issue
8
Year of publication
1997
Pages
629 - 634
Database
ISI
SICI code
1251-8050(1997)325:8<629:LJAECU>2.0.ZU;2-8
Abstract
The polyphyletic suborder Ancyloceratina had an evolutionary success d uring the entire Cretaceous period. Protancyloceratinae appeared in Ea rly Tithonian and Crioceratitinae during the Lace Valanginian-Early Ha uterivian transition. Eustatic variations or buoyancy efficiency are n ot related with the evolutionary success of these two lineages. Their evolution was favored by trophic opportunities created after important , palaeogeographic global changes.