8th International Symposium Cephalopods – Present and Past, by PDF

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Extra info for 8th International Symposium Cephalopods – Present and Past, August 30 – September 3, 2010, University of Burgundy & CNRS, Dijon – France. Abstracts Volume

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In Upper Jurassic - Lower Cretaceous (Tithonian - Hauterivian), similar belemnite rostra can be found, attributed to genus Pseudobelus and family Duvaliidae. Naef considered possible relationship between Rhabdobelus and Duvaliidae via Pseudobelus; Jeletzky shared this opinion, and these genera became a link between suborders Belemnopseina and Belemnitina of his classification. Modern authors usually separate them in different families, thus considering convergent, or consider Rhabdobelus to be a synonym of Pseudobelus (R.

The abundant data on P. flexuosum at Vallecillo, on the paleoenvironment and on the early Turonian ecosystem are combined here to a palaeobiological model for the mode of life of this ammonite. 8th International Symposium, Cephalopods – Present and Past (Dijon – France 2010) 49 Figure: Obliquely embedded specimen of Pseudaspidoceras flexuosum from the Platy Limestone at Vallecillo, Mexico. This specimen shows long, fragile spines perserved on the ventrolateral tubercles of the body chamber. Early Turonian, UANL-FCT-VCII95B, Scale in cm.

Serpulatus. They obtain peculiar rostrum cross-section, similar to «8» numeral created by deep lateral furrows, unusual among belemnites. These rostra were erected to a family Rhabdobelidae by Nalnjaeva in 1967. In Upper Jurassic - Lower Cretaceous (Tithonian - Hauterivian), similar belemnite rostra can be found, attributed to genus Pseudobelus and family Duvaliidae. Naef considered possible relationship between Rhabdobelus and Duvaliidae via Pseudobelus; Jeletzky shared this opinion, and these genera became a link between suborders Belemnopseina and Belemnitina of his classification.

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8th International Symposium Cephalopods – Present and Past, August 30 – September 3, 2010, University of Burgundy & CNRS, Dijon – France. Abstracts Volume


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