Results 31 to 40 of about 202 (155)
Rivista Italiana di Paleontologia e Stratigrafia, 2018 A Middle Norian (Alaunian 2) ammonoid assemblage from north of Esfahan (Central Iran) is described and chronostratigraphically evaluated. Formerly known as Distichites fauna, it represents a geographically widely distributed and stratigraphically ...
LEOPOLD KRYSTYN +3 more
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The tornoceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea)
European Journal of Taxonomy, 2022 The ammonoids of the suborder Tornoceratina from the Middle to Late Devonian Red Ironstone Formation of the area around Dillenburg (eastern Rhenish Mountains) are revised, mainly based on historical collections stored in the Museum für Naturkunde ...
Dieter Korn, Jürgen Bockwinkel
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THE MIDDLE TRIASSIC NEW GENUS PRAEPINACOCERAS (FAMILY PINACOCERATIDAE)
Rivista Italiana di Paleontologia e Stratigrafia, 2017 The new genus Praepinacoceras with Pinacoceras damesi Mojsisovics, 1882 as type species is here described. This genus is represented by Upper Anisian to Ladinian species, having an involute, compressed shell, smooth or with thin ribs, or weak short folds
NERINA FANTINI SESTINI
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KOCAELIA GEN. N. (FAMILY BEYRICHITIDAE) FROM MIDDLE ANISIAN
Rivista Italiana di Paleontologia e Stratigrafia, 2018 The new genus Kocaelia, with Aspidites toulai (Arthaber) as a type species, is here described. Based on the involute and compressed shape, occurrence of straight to slightly sinuous ribs and subammonitic suture in mature individuals the genus Kocaelia is
NERINA FANTINI SESTINI
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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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NEW EARLY BATHONIAN BIGOTITINAE AND ZIGZAGICERATINAE (AMMONOIDEA, MIDDLE JURASSIC)
Rivista Italiana di Paleontologia e Stratigrafia, 2007 Several tens of Lower Bathonian Bigotites from Digne-Castellane region (SE France) and Cabo Mondego area (Portugal) have been reviewed. Three species have been distinguished in the lowermost subzone of the Zigzag Zone (Parvum Subzone) just above the ...
SIXTO R. FERNÁNDEZ-LÓPEZ +3 more
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The gaudryceratid ammonoids from the Upper Cretaceous of the James Ross Basin, Antarctica [PDF]
Acta Palaeontologica Polonica, 2019 We describe new material of the subfamily Gaudryceratinae in Antarctica, including five new species: Gaudryceras submurdochi Raffi and Olivero sp. nov., Anagaudryceras calabozoi Raffi and Olivero sp.
María E. Raffi +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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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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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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