Results 131 to 140 of about 383 (157)

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

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

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

On the Turonian origin of the Goniocamax-Belemnitella stock (Cephalopoda, Coleoidea)

Geobios, 2012
Abstract A new subgenus within the genus Goniocamax, Progoniocamax nov. subgen., is described. It includes the Late Turonian-Early Coniacian species “Actinocamax” surensis Naidin and Actinocamax intermedius Arkhangelsky. The new subgenus represents a transition between the genera Praeactinocamax and Goniocamax.
openaire   +1 more source

Callovian and Oxfordian (Jurassic) teuthids (Coleoidea, Cephalopoda) from Chile

Journal of Paleontology, 2016
AbstractColeoid specimens from the Jurassic of northern Chile are included in two different species ofTrachyteuthis, i.e.,T. covacevichiFuchs and Schultze, 2008 andT. chilensisn. sp., and in a new genus and a new species,Pseudoteudopsis perezin. gen. n. sp. The specimens described and figured are from two different areas in northern Chile.
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

Structure and phylogenetic significance of Trachyteuthis (Coleoidea) from the Kimmeridge Clay of England

Proceedings of the Yorkshire Geological Society, 1988
SUMMARY The large and rare coleoid cephalopod Trachyteuthis is found within the lithographic limestones of the German Lower Tithonian and the contemporaneous bituminous shales of the Kimmeridge Clay Formation. Complete shells are apparently confined to the more anoxic facies. The occurrence of francolitic
R. A. Hewitt, P. B. Wignall
openaire   +1 more source

Siphuncular structure in the Jurassic belemnitidMegateuthis(Cephalopoda: Coleoidea)

GFF, 2014
Each septum of the phragmocone in the Jurassic belemnitid Magateuthis is composed of a thick, lamello-fibrillar, nacreous layer and a thin, chitinous layer, here termed the additional chitinous layer, which covers the aboral surface of the septum. The nacreous and additional chitinous layers continue from the septum into the septal neck.
openaire   +1 more source

Analyse microstructurale ďunAulacoceras (Mollusca — Coleoidea) juvénile du Trias de Turquie

Paläontologische Zeitschrift, 1982
Der Fund eines juvenilenAulacoceras mit Protoconch, Phragmokon und Rostrum wird morphologisch und mikrostrukturell beschrieben. Da die morphologischen Merkmale zu indifferenziert sind, wurden der systematischen Bestimmung die mikrostrukturellen Daten zugrunde gelegt.
openaire   +1 more source