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Aptychi microstructure in Late Cretaceous Ancyloceratina (Ammonoidea)
Lethaia, 2009The microstructure of aptychi (bivalved calcareous coverings on lower jaws) of three genera of Late Cretaceous Ancyloceratina, Baculites, Polyptychoceras and Jeletzkytes is described for the first time on the basis of well-preserved and in situ material from the Western Interior of the USA and Hokkaido, Japan.
Kruta, I. +4 more
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An ecomorphospace for the Ammonoidea
Paleobiology, 2018AbstractThe fossil conchs of ammonoids provide valuable information about the life habits of this extinct group. A new conch measurement, the apertural surface area (ASarea), is introduced here along with modeled sizes of the buccal mass and the hyponome, based on ratios of these organs in comparison with the aperture height from the RecentNautilus ...
Sonny A. Walton, Dieter Korn
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Aalenian Tmetoceras (Ammonoidea) from Iberia
1999Several hundred Aalenian Tmetoceras from the Iberian Peninsula (N Lusitanian Basin, Asturias, Basque-Cantabrian Basin, NE Cameros, NW Iberian Basin, Aragonese Platform, Tortosa Platform, Castilian Platform, Majorca and Betic Basin) have been reviewed.
S. R. Fernández-López +4 more
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Über den Kieferapparat der Lytoceratacea (Ammonoidea)
Paläontologische Zeitschrift, 1980Die Kieferapparate der bisher bekannten palaozoischen und triassischen Ammonoideen erinnern an Papageienschnabel, sie besitzen scharfe Schneiden und bestehen aus chitiniger Substanz. Sie bilden, zusammen mit den Kieferapparaten der rezenten Coleoideen, den Normal-Typ des Cephalopoden-Kieferapparates.
U. Lehmann +3 more
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On Senonian Ammonoidea from Jamaica
Geological Magazine, 1925In 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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Lias-Anaptychen als Kieferelemente (Ammonoidea)
Paläontologische Zeitschrift, 1970Funde 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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The jaw apparatuses of Cretaceous Phylloceratina (Ammonoidea)
Lethaia, 2013Tanabe, K., Misaki, A., Landman, N.H. & Kato, T. 2013: The jaw apparatuses ofCretaceous Phylloceratina (Ammonoidea). Lethaia, Vol. 46, pp. 399–408.The jaw apparatuses of two species of Late Cretaceous Phylloceratina (Ammonoidea),Hypophylloceras subramosum and Phyllopachyceras ezoensis, are described on the basisof well-preserved in situ material from ...
Kazushige Tanabe +3 more
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