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22ndLAK 2011, Heidelberg Abstracts 131
MID-CRETACEOUS MARINE GASTROPODS OF THE SERGIPE BASIN,
NORTH-
EASTERN BRAZIL
MANUELA LEXEN& PETER BENGTSON
Institute of Earth Sciences, Heidelberg University, Im
Neuenheimer Feld 234, 69120 Heidelberg, Germany: manuela.
The Museum of Earth Sciences of Heidelberg University houses the
probably largest col-
lection of marine Cretaceous macrofossils from Brazil outside
this country. The material com-
prises approximately 14,000 specimens of ammonites, bivalves,
gastropods, echinoids as well
To date, the ammonites, bivalves and echinoids have been the
subject of taxonomic and/or bio-
stratigraphic studies. The present project concerns the
AptianConiacian gastropods from the
Sergipe Basin, including exquisitely preserved specimens with
colour patterns from the Aptian
The Sergipe Basin is one of a series of continental margin
basins along the Brazilian
coast, which were formed in the late Mesozoic by rifting and
separation of the South American
Cretaceous succession is extensively exposed and composed of
predominantly shallow-water
carbonates and mudstones representing one of the most complete
Cretaceous successions of
the South Atlantic region.
Preliminary studies of the CenomanianConiacian gastropods
(Burrer 2003; Dietzel 2003;
Lexen, in preparation) have revealed a diverse fauna with at
least 30 genera, notably Pseud-
amaura, Aporrhais, Anchura, Drepanocheilus and Piestochilus
coeval faunas of the Tethyan realm, such as those of northern
Africa, the Near East and North
America.
Besides taxonomic treatment of the gastropods, the palaeoecology
and palaeobiogeog-raphy of the fauna is being studied. Particular
attention is paid to the biostratigraphic potential of
The project is part of a long-term project comprising the entire
macro- and microfauna of the
marine Cretaceous of north-eastern Brazil, with the overall
objective of establishing an integrated
biostratigraphy for the South Atlantic region.
Burrer, N. 2002. Gastropoden aus dem CenomanConiac des
Sergipe-Beckens, Brasilien. Teil1: Die Gattungen Aporrhais,
Avellana, Drepanocheilus, Epitonium, Fasciolaria,
Fusus,Globiconcha, Lunatia, Piestochilus, Pterocera, Ringinella,
Turbo, Turritella, Tylostoma,Voluta, Volutilithes, Volutomorpha. -
101 pp. Unpublished Diploma thesis, HeidelbergUniversity.
Beckens, Brasilien. Teil 2: Die Gattungen Akera, Ampullina,
Cerithium, Cimolithium,Dicroloma, Drepanocheilus, Drilluta,
Euomphalus, Fasciolaria, Mesalia, Piestochilus,Pterodonta,
Scalaturris, Solarium, Turbo, Turritella, Tylostoma, Uchauxia,
Voluta. - 215pp. Unpublished Diploma thesis, Heidel berg
University.
LAK2011.indb 131 16.03.2011 15:27:24 Uhr
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22ndLAK 2011, Heidelberg Organizing Team 1
Organizers
Wolfgang Stinnesbeck
Stefan Gtz
Organizing Team
Hpke Andresen
Gregor Austermann
Peter Bengtson
Francisco Jos Cueto Berciano
Karin Dietzschold
Ulrich A. Glasmacher
Jan Hartmann
Dominik HennhferAnne Hildenbrand
Margot Isenbeck-Schrter
Arabella Jankovic
Martin Maier
Enric Pascual Cebrian
Stefan Rheinberger
Silvia Rheinberger
Simon Ritter
Christian Salazar
Christian Scholz
Cite as: Gtz, S., Bengtson, P., Cueto Berciano, F.J.,
Stinnesbeck, W. (Eds.) 2011: 22nd
International Colloquium on Latin American Earth Sciences,
Abstracts and Programme.GAEA heidelbergensis 18, 231 p.
Cover picture: Eroded gypsum dunes of Cuatro Cienegas, Coahuila,
NE-Mexico. In the background,steeply folded Early Cretaceous
limestones of the Sierra Madre Oriental. Photo: StefanGtz
LAK2011.indb 1 16.03.2011 15:26:46 Uhr
