Results 191 to 200 of about 3,015 (220)

The Cretaceous Ammonoidea of Eastern Australia

1926
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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IV.—Shell-Structure in the Ammonoidea

Geological Magazine, 1895
The shell-structure of the Ammonoidea has received very inadequate attention from palæontologists; in most cases authors are content with describing the shell of the recent Nautilus, and saying that that of the Ammonites is exactly the same. Prof. Judd therefore suggested that I should take the subject up, when working as a research student under him ...
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Sur le genre Lytocrioceras Spath, 1924 (Ammonoidea, Ancyloceratina)

Geobios, 1992
Resume Les decouvertes recentes de nouveaux exemplaires de Lytocrioceras jauberti ( Astier , 1851 ) permettent une meilleuredefinition de cette espece rare et du genre auquel elle appartient. Sa position stratigraphique est precisee (Barremien inferieur: zone a Hugii). La presence dans les memes niveaux d'une deuxieme forme jusqu'a present inconnue (
Gérard Delanoy, Antoine Poupon
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Phylogeny of the Permian family Metalegoceratidae (Goniatitida, Ammonoidea)

Paleontological Journal, 2008
The paper discusses the evolution of the Permian ammonoid family Metalegoceratidae, and a new phylogenetic reconstruction is proposed. Three subfamilies are recognized in this family: Metalegoceratinae Plummer et Scott, 1937; Pericycloceratinae Zhao et Zheng, 1977; and Eothinitinae Ruzhencev, 1956.
M. S. Boiko, T. B. Leonova, Mu Lin
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Über die “forme elliptique” der primitiven Ammonoidea

Paläontologische Zeitschrift, 1962
Die erstmals von J.Barrande erwahnte „forme elliptique“ ist — entgegen bisheriger Ansicht — eine bei primitiven Ammonoideen durchaus nicht seltene Erscheinung. Es handelt sich bei ihr keineswegs um ein vereinzeltes atavistisches bzw. teratologisches Phanomen, sondern um abklingendes, von ortho-conen Ammonoideen-Vorfahren ubernommenes Erbe. Insofern ist
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Jaws, radula, and crop of Arnioceras (Ammonoidea)

1971
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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The Ammonoidea of the Upper Chalk. Part 1

Monographs of the Palaeontographical Society, 2019
A total of 34 species, assigned to 19 genera belonging to the suborders Phylloceratina, Lytoceratina and Ammonitina are described. One species is new.
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Chapter 15 Mollusca: Cephalopoda (Ammonoidea)

Geological Society, London, Special Publications, 1967
D. T. Donovan, F. Hodson, M. K. Howarth, M. R. House, E. T. Tozer, C. W. Wright   +5 more
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V.—On Upper Cretaceous Ammonoidea from Pondoland

1921
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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The Ammonoidea of the Lower Chalk

Monographs of the Palaeontographical Society, 1985
C. W. Wright, W. J. Kennedy
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