Early Cretaceous (Valanginian – Hauterivian) belemnites from western Morocco: stratigraphy and palaeoecology

Diversity and morphological evolution of Jurassic belemnites from South Germany

“…According to their fossil record, these coleoids inhabited surface to deep waters of epicontinental domains, and were present at worldwide scale, both in the subtropical and polar areas (Stevens, 1963(Stevens, , 1965(Stevens, , 1971Stevens and Clayton, 1971;Christensen, 1976;Doyle, 1987Doyle, , 1994Doyle et al, 1997;Christensen, 2002). In agreement with the regional distribution and the palaeoenvironmental differences in the taxonomic composition of most belemnite communities (Mutterlose and Wiedenroth, 1998;Mariotti et al, 2012;Weis et al, 2012), recent geochemical analyses of rostra indicate that different species might have had different ecological preferences in term of life depth, seawater temperature, or salinity (Dutton et al, 2007;McArthur et al, 2007;Dera et al, 2009;Rexford and Mutterlose, 2009;Mutterlose et al, 2010;Wierzbowski and Rogov, 2011;Li et al, 2012;Harazim et al, 2013;Stevens et al, 2014;Wierzbowski, 2015). Nevertheless, some eurytopic taxa likely migrated over several hundreds of kilometers and different depths during their lifetime (Christensen, 1997;Zakharov et al, 2006;Alsen and Mutterlose, 2009;Sørensen et al, 2015).…”

“…In complement of the robust calcitic structure of rostra favouring their preservation (Saelen, 1989;Ullman et al, 2015), this ability to occupy a wide range of environments (and facies) is quite positive if we expect to have a continuous fossil record whatever the lithology. However, this calls for careful interpretation of diversity results because the variability of ecological tolerances and behaviours of belemnite taxa could distort the faunal composition and richness levels through time at regional scale (Mutterlose and Wiedenroth, 1998). Despite these considerations, we consider however that the belemnite fossil record from South Germany might be the most suitable for appraising general biodiversity patterns because similar analyses of regional ammonite faunas with similar collection efforts match broader diversity variations depicted at Euro-Boreal scale (Moyne and Neige, 2007;Simon et al, 2010Simon et al, , 2011.…”

First record of Duvalia ex. gr. lata (Cephalopoda, Coleoidea) from Mexico

“…) in Valanginian-Hauterivian strata of the Cape Verde Island Maio, which confirms a migration pathway of duvaliids along the southern border of the Hispanic Corridor westwards into Mexico. The paleobiogeographic distribution of the genus Duvalia was summarized by Mutterlose (1992) and is shown in Figure 3 (with additional data from Mutterlose and Wiedenroth, 2008;Alsen and Mutterlose, 2009;Janssen (pers. com.…”

First Record of the Belemnite Genus Hibolithes from Late Jurassic–Early Cretaceous Turbidites from Malaysia

“…The genus Hibolithes (Belemnopseina) includes a wide range of morphological forms ranging from elongatecylindrical to stout, and strongly hastate in shape (Mutterlose, 1986;Mutterlose and Wiedenroth, 2008). The length of the central groove also varies.…”