Revision of the planktonic foraminifera Pseudothalmanninella klausi (LEHMANN, 1966) and Globotruncanella semsalensis (CORMINBOEUF, 1961) and first scanning electron microscope (SEM) images of the holotypes

• Main Authors: Spezzaferri, Silvia, Caron, Michèle
• Language: English
• Published: 2008
• Subjects: Planktonic foraminifera
• Online Access: http://doc.rero.ch/record/11218/files/spezzaferri_rpf.pdf

The planktonic foraminifera Rotalipora klausi Lehmann, 1966 and Globotruncana? semsalensis Corminboeuf, 1961, were figuredonly by drawings and the specimens were never made publicly available, although deposited in the collections of the Departmentof Geosciences, Fribourg, Switzerland. We present here for the first time their Scanning Electron Microscope documentation andcomparison with the original drawings. We complete the morphological descriptions and, accordingly, we emend the generic attributionof both species.Since its first description Rotalipora klausi has acquired a great importance as phylogenetic and biostratigraphic marker for the LateAlbian. Its generic attribution is made according to the recent revision of the polyphyletic group of Rotaliporids as Pseudothalmanninellaklausi.Globotruncana? semsalensis was first described in a rich planktonic foraminiferal assemblage of Upper Campanian. This species wasdisregarded for long time because of some disturbing resemblances with the Praeglobotruncana lineage. The present study proves thevalidity of this species and attributes it to the genus Globotruncanella.