Results 141 to 150 of about 828 (171)

Protoconch morphology of Conoteuthis (Diplobelida, Coleoidea) and its implications on the presumed origin of the Sepiida

Cretaceous Research, 2012
Abstract The phylogenetic origin of the Sepiida is still unclear. The presumed derivation from diplobelid belemnoids can be tested by comparison of their initial chambers (protoconchs). The first investigation of a juvenile phragmocone of the diplobelid Conoteuthis hayakawai from the Cenomanian of Hokkaido (northern Japan) yielded surprising ...
Dirk Fuchs, Helmut Keupp, Frank Wiese
exaly   +3 more sources

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The evolutionary history of the Decabrachia (Cephalopoda, Coleoidea)

Palaeontographica, Abteilung A: Palaozoologie - Stratigraphie, 1997
exaly   +2 more sources

Taxonomic revision of ?Onychoteuthis? conocauda Quenstedt, 1849 (Cephalopoda: Coleoidea)

Neues Jahrbuch Fur Geologie Und Palaontologie - Abhandlungen, 2013
Dirk Fuchs, Helmut Keupp
exaly   +2 more sources

Chintinobelus acifer Fischer 1981, a belemnoteuthid (Coleoidea) with epirostrum.

Neues Jahrbuch Fur Geologie Und Palaontologie - Abhandlungen, 1983
Joachim Reitner
exaly   +2 more sources

The Xiphoteuthididae Bather, 1892 (Aulacocerida, Coleoidea)

1999
Problems in the classification of the Xiphoteuthididae have been recently addressed (Mariotti and Pignatti, 1992, 1994, 1996; Pignatti and Mariotti, 1996), but a critical revision is still lacking, owing mainly to their incomplete fossil record. The following outline of a classification summarizes diagnostic characters, taxonomic relationships, and ...
Nino Mariotti, Johannes S. Pignatti
openaire   +3 more sources

PHRAGMOTEUTHIDA (CEPHALOPODA: COLEOIDEA) FROM THE LOWER JURASSIC OF DORSET, ENGLAND

Palaeontology, 2006
Abstract:  Phragmoteuthida from the Lower Jurassic (Upper Sinemurian) of Dorset, England, are fully described for the first time. Two species are recognized and described: Phragmoteuthis montefiorei (J. Buckman) and P. huxleyi sp. nov. Phragmocones have an apical angle of between 20 and 30 degrees, and relatively few chambers compared with belemnoids ...
exaly   +2 more sources

Two new genera of Coleoidea from the Chickasawhay Limestone (Oligocene) of Alabama

Neues Jahrbuch Fur Geologie Und Palaontologie - Abhandlungen, 2008
Charles N Ciampaglio
exaly   +2 more sources

New Coleoidea from the Lower Jurassie of Southwest Germany

Neues Jahrbuch Für Geologie Und Paläontologie, 1982
exaly   +2 more sources

Ultrastructural Analyses on the Conotheca of the Genus Belemnotheutis (Belemnitida: Coleoidea)

2007
Russian Academy of Sciences, Palaeontological Institute, Profsojuznaja 123, Moscow 117997, Russia, vmitta@mail.ru1 Introduction 2992 Previous Studies 3003 Material and Methods 3014 Ultrastructural Observations on the Conotheca ...
Dirk Fuchs, Helmut Keupp, Vasilij Mitta, Theo Engeser   +3 more
openaire   +1 more source

Loligosepia (Cephalopoda: Coleoidea) from the Lower Jurassic of the Dorset coast, England

Neues Jahrbuch Fur Geologie Und Palaontologie - Abhandlungen, 2014
Desmond T. Donovan, Sigurd von Boletzky
exaly   +2 more sources