Results 151 to 160 of about 814 (192)

Ammonoidea

, 2011
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Ammonoidea

, 2006
Keith Young
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On Senonian Ammonoidea from Jamaica

Geological Magazine, 1925
In his paper on “The Yellow Limestone of Jamaica and its Mollusca” (Geological Magazine, Vol. LX, 1923, p. 345) Dr. C. T. Trechmann referred to an Upper Senonian fauna from shales at Providence, near Port Antonio, underlying a limestone with Rudistae.
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The Ammonoidea of the Upper Chalk. Part 2

Monographs of the Palaeontographical Society, 2020
A total of 40 species, assigned to 17 genera, belonging to the Suborder Ancyloceratina are described. One species is new.
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A discovery of the genus Cabrieroceras (Werneroceratidae, Ammonoidea) in Salair

Paleontological Journal, 2010
The ammonoid genus Cabrieroceras Bogoslovsky is recorded for the first time from the Eifelian of Salair (from the Safonovo Horizon). These ammonoids date the host rocks as the Cabrieroceras crispiforme Zone, recognized in many sections in Western Europe, North America, and North Africa.
S. V. Nikolaeva, N. K. Bakharev
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The Position of the Ammonoidea within the Cephalopoda

1996
The position of the Ammonoidea within the Cephalopoda is no longer in much dispute. Almost all those who study cephalopods agree that the Ammonoidea are more closely related to the Coleoidea than to the other ectocochleate cephalopods, i.e., the Nautiloidea (Jacobs and Landman, 1994). There also can be no serious doubts that the Ammonoidea were derived
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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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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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Lias-Anaptychen als Kieferelemente (Ammonoidea)

Paläontologische Zeitschrift, 1970
Funde von zusammengehorigen Ober- und Unterkiefern der GattungenPsiloceras, Pleuroceras undArnioceras beweisen, das die sogenannten «Anaptychen» der Lias-Ammoniten im Gegensatz zu fruheren Annahmen keine Deckel sind, sondern Kieferelemente. Es wird ein nach Serienschliffen angefertigtes Modell des Kieferapparates einesPsiloceras sp. gezeigt.
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On Some New Ammonoidea from the Chalk Rock

Geological Magazine, 1927
As a result of work on the Chalk Rock in the Hitchin district during the last two years, I have obtained several Ammonoidea which differ in certain respects from those already figured and described and include two new species.
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