Results 101 to 110 of about 202 (155)
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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 ...
Neil Landman, Akihiro Misaki
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Evolution of the Permian family Spirolegoceratidae (Goniatitida, Ammonoidea)
Paleontological Journal, 2007The evolution of the Permian ammonoid family Spirolegoceratidae is discussed and a new phylogenetic reconstruction is proposed based on new data. Two subfamilies are recognized within the family Spirolegoceratidae: Spirolegoceratinae Nassichuk and Sverdrupitinae subfam. nov. A new genus, Archboldiceras, is proposed to accommodate the Australian species
T B Leonova, Leonova T B
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An ecomorphospace for the Ammonoidea
Paleobiology, 2018Abstract The fossil conchs of ammonoids provide valuable information about the life habits of this extinct group. A new conch measurement, the apertural surface area (AS area ), is introduced here along with modeled sizes of the buccal mass and the hyponome, based on ratios ...
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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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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IV.—Shell-Structure in the Ammonoidea
Geological Magazine, 1895The 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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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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The Ammonoidea of the Upper Chalk. Part 2
Monographs of the Palaeontographical Society, 2020A total of 40 species, assigned to 17 genera, belonging to the Suborder Ancyloceratina are described. One species is new.
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