Results 61 to 70 of about 814 (192)
, 2021 Fig. 53. Triainoceratidae from the Red Ironstone Formation, all reproduced from d'Archiac & de Verneuil (1842). A. Sandbergeroceras costatum (d'Archiac & de Verneuil, 1842). B. Sandbergeroceras incertum (d'Archiac & de Verneuil, 1842).
Korn, Dieter, Bockwinkel, Jürgen
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Ontogeny and covariation in the Toarcian genus Osperleioceras (Ammonoidea) [PDF]
Bulletin de la Société Géologique de France, 2003 Abstract Starting from embryonic (protoconch-ammonitella) and early juvenile shells, which are indistinguishable at the species level, growth curves of Osperleioceras from the Reynesi Subzone (Upper Toarcian) of the Causses Basin (Aveyron, France) show a continuous radiating range of correlated variation in dimensional and ornamental ...
Jean Guex, Alain Morard
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Nouveaux exemples de dimorphisme chez les Ancyloceratina (Ammonoidea) de l'Hauterivien vocontien
, 1995 New examples of dimorphism inside Vocontian Hauterivian Ancyloceratina (Ammonoidea). The existence of dimorphic pairs demonstrated already inside the heteromorphic ammonite populations from Hauterivian and Barremian ages : (Avram, 1984 ; Aguirre-Urreta ...
Ropolo, P., Gonnet, R.
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MIDDLE TRIASSIC CERATITIDS (AMMONOIDEA) COLLECTED BY C. RENZ FROM HYDRA (GREECE)
Rivista Italiana di Paleontologia e Stratigrafia, 2017 This paper is focused on the description of an assemblage of ceratitids collected more than 50 years ago by C. Renz from the Han-Bulog Limestone of Hydra (Greece), up to the present never described.
MARCO BALINI
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European Journal of Taxonomy, 2022 The ammonoids of the suborder Gephuroceratina from the Roteisenstein (Red Ironstone) Formation of the area around Dillenburg (eastern Rhenish Mountains) are revised, mainly based on historical collections stored in the Museum für Naturkunde, Berlin. The
Dieter Korn, Jürgen Bockwinkel
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Sexual dimorphism in the Bathonian morphoceratid ammonite Polysphinctites tenuiplicatus [PDF]
Acta Palaeontologica Polonica, 2016 Asphinctites tenuiplicatus [M] and Polysphinctites secundus [m] from the Asphinctites tenuiplicatus Zone (Early Bathonian), are usually considered as a sexual dimorphic pair, although authors describe them as separate species.
Horacio Parent, Michał Zatoń
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Data from: An ecomorphospace for the Ammonoidea
, 2017 The fossil conchs of ammonoids provide valuable information about the life habits of this extinct group. A new conch measurement, the apertural surface area, is introduced here along with modelled sizes of the buccal mass and the hyponome, based on ...
Walton, Sonny +2 more
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Geologica Carpathica, 2016 This contribution focuses on the Perisphinctoidea ammonite taxa from the Upper Tithonian at Charens (Drôme, south-east France). Emphasis is laid on five genera that belong to the families Himalayitidae and Neocomitidae.
Frau Camille +3 more
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A new type of shell malformation caused by epizoans in Late Jurassic ammonites from Central Russia [PDF]
Acta Palaeontologica Polonica, 2016 A new type of shell damage on Late Jurassic ammonite Kachpurites fulgens is described. The new type of shell malformation consists of small elongated pits, arranged in groups on the surface of ammonite shell and concentrated near the terminal aperture ...
Aleksandr A. Mironenko
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VI.—On Cretaceous Ammonoidea from Angola, collected [PDF]
Transactions of the Royal Society of Edinburgh, 1922 The Ammonoids described in the present paper were placed first of all, for study, in the hands of Mr J. M. Wordie, whose departure, however, as geologist with Sir E. Shackleton's Antarctic Expedition prevented the completion of the work. A preliminary list of identifications by Mr Wordie included a number of forms of “Schloenbachia” especially “S ...
Gregory, J. W. +2 more
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