Another lesson from beautiful monsters: the case of 'sex reversals' in the Ammonoidea and their significance [PDF]
BMC Ecology and Evolution, 2021 Background Expression of sexual dimorphism is recognised in various fossil groups of molluscs such as the Ammonoidea, an extinct group of shelled cephalopods.
Camille Frau, Pierre-Yves Boursicot
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Evolutionary development of the cephalopod arm armature: a review [PDF]
Swiss Journal of Palaeontology, 2021 The cephalopod arm armature is certainly one of the most important morphological innovations responsible for the evolutionary success of the Cephalopoda.
Dirk Fuchs +2 more
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Cephalopod palaeobiology: evolution and life history of the most intelligent invertebrates [PDF]
Swiss Journal of Palaeontology, 2022 Sigurd von Boletzky was a cephalopod researcher who was world-renowned for his enthusiasm for his field of research, for his friendly and calm personality, and, of course, his publications.
Christian Klug +6 more
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Failed prey or peculiar necrolysis? Isolated ammonite soft body from the Late Jurassic of Eichstätt (Germany) with complete digestive tract and male reproductive organs [PDF]
Swiss Journal of Palaeontology, 2021 Ammonoid soft parts have been rarely described. Here, we document the soft parts of a perisphinctid ammonite from the early Tithonian of Wintershof near Eichstätt (Germany). This exceptional preservation was enabled by the special depositional conditions
Christian Klug +3 more
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First record of non-mineralized cephalopod jaws and arm hooks from the latest Cretaceous of Eurytania, Greece [PDF]
Swiss Journal of Palaeontology, 2020 Due to the lower fossilization potential of chitin, non-mineralized cephalopod jaws and arm hooks are much more rarely preserved as fossils than the calcitic lower jaws of ammonites or the calcitized jaw apparatuses of nautilids. Here, we report such non-
Christian Klug +3 more
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The balancing act of Nipponites mirabilis (Nostoceratidae, Ammonoidea): Managing hydrostatics throughout a complex ontogeny. [PDF]
PLoS ONE, 2020 Nipponites is a heteromorph ammonoid with a complex and unique morphology that obscures its mode of life and ethology. The seemingly aberrant shell of this Late Cretaceous nostoceratid seems deleterious. However, hydrostatic simulations suggest that this
David J Peterman +2 more
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Ontogeny of highly variable ceratitid ammonoids from the Anisian (Middle Triassic) [PDF]
PeerJ, 2021 Ammonoids reached their greatest diversity during the Triassic period. In the early Middle Triassic (Anisian) stage, ammonoid diversity was dominated by representatives of the family Ceratitidae.
Eva Alexandra Bischof +3 more
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Taxonomy, evolutionary History and Distribution of the middle to late Famennian Wocklumeriina (Ammonoidea, Clymeniida) [PDF]
Fossil Record, 2000 Old collections, new records, and data from global literature are used for taxonomic revisions and for a new reconstruction of the evolutionary history of the triangularly coiled clymenids, the Wocklumeriaceae, and their ancestors.
R. T. Becker
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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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The old and the new plankton: ecological replacement of associations of mollusc plankton and giant filter feeders after the Cretaceous? [PDF]
PeerJ, 2018 Owing to their great diversity and abundance, ammonites and belemnites represented key elements in Mesozoic food webs. Because of their extreme ontogenetic size increase by up to three orders of magnitude, their position in the food webs likely changed ...
Amane Tajika +2 more
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