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 ...
J. W. Gregory +2 more
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TAXONOMY,STRATIGRAPHY AND PHYLOGENY OF THE NEW GENUS LANCEOPTYCHITES (AMMONOIDEA, ANISIAN)
Rivista Italiana di Paleontologia e Stratigrafia, 1998 For the first time a population analysis of compressed Ptychitidae (Ammonoidea) bed-by-bed collected from Prezzo Limestone (Upper Anisian, Southern Alps) is performed.
MARCO BALINI
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Analysis of septal spacing and septal crowding in Devonian and Carboniferous ammonoids
Swiss Journal of Palaeontology, 2021 Septal crowding is widely known as a sign of maturity in conchs of ammonoids and nautiloids. However, reduced septal spacing may also occur as a consequence of adverse ecological conditions. Here, we address the question how septal spacing varied through
Sophie Marie Beck +3 more
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Phylloceratina ammonoids in the Iberian Basin during the Middle Jurassic: a model of biogeographical and taphonomic dispersal related to relative sea-level changes [PDF]
, 1996 Phylloceratina and Lytoceratina ammonoids in the Middle Jurassic of the Iberian Chain (E. Spain) represent less than 1% of the whole of Ammonoidea. There are two intervals, however, in which their occurrence is remarkably constant: within the Upper ...
Fernández López, Sixto Rafael +1 more
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Ammonite stratigraphy of a Toarcian (Lower Jurassic) section on Nagy-Pisznice Hill (Gerecse Mts, Hungary) [PDF]
, 2010 In the Jurassic rocks exposed in a small abandoned quarry on the northwestern edge of Nagy-Pisznice Hill in the Gerecse Mts, fairly well preserved parts of a crocodile skeleton was found in 1996.
András Galácz +55 more
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Aulatornoceras (Truyolsoceras) n. subgén. (Ammoinoidea, Tornoceratina) from the Devonian of the Cantabrian and Iberian mountains (NW & NE Spain) [PDF]
, 1988 [Resumen] El género Aulatornoceras comprendía hasta la actualidad un amplio espectro de morfologías y, entre ellas, conchas de especies con perfiles más comprimidos que el resto de formas congenéricas, poseyendo al mismo tiempo ombligos puntiformes. Esta
Montesinos López, José Román
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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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Cenomanian ammonites from Santander (Cantabria) and Sopeira (Aragón, southcentral Pyrenees), northern Spain [PDF]
, 2014 Ammonites del Cenomaniense de Santander (Cantabria) y de Sopeira (Aragón, Pirineos centro-meridionales), España septentrional. Se describen por primera vez ammonites del Cenomaniense superior (Cretácico) de los alrededores de Santander y de Sopeira ...
Bilotte, M., Kennedy, W. J.
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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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