Parkiella n. gen., a Late Creataceous Turrilinacid Foraminifer from Gabon and Cameroon, West Africa

New species of the genus <i>Parkiella</i> (Foraminifera) from the Late Cretaceous Central Pacific Ocean: biostratigraphy, biogeography, and the Cretaceous–Palaeogene boundary

“…The diagnosis of Parkiella is based on its 'low trochospiral coil' and 'complex 'L'-shaped aperture' (Seiglie et ul., 1993). These characteristics together with the generally lower number of chambers/whorl separate Parkiellu from Buliminella Cushman 1927 and Praebulimina Hofker 1957 according to Seiglie et al (1993) Parkiella on the basis of apertural characteristics (Seiglie et a/., 1993). Seiglie et a/.…”

“…The genus Parkiella was recently established by Seiglie et al (1993) on the type species Buliminella gabonica de Klasz and RCrat, 1962. It includes a group of morphologically distinct species described from Upper Cretaceous shelf deposits from West Africa (Cameroon and Gabon) by de Klasz & Rerat (1962) and de Klasz et al (1963).…”

“…These characteristics together with the generally lower number of chambers/whorl separate Parkiellu from Buliminella Cushman 1927 and Praebulimina Hofker 1957 according to Seiglie et al (1993) Parkiella on the basis of apertural characteristics (Seiglie et a/., 1993). Seiglie et a/. (1993) found it problematic, however, to place Parkiella in a higher systematic category, since the specimens in their well samples were completely replaced by pyrite or completely pyrite infilled, which made it impossible to observe any internal apertural features.…”

“…(1993) found it problematic, however, to place Parkiella in a higher systematic category, since the specimens in their well samples were completely replaced by pyrite or completely pyrite infilled, which made it impossible to observe any internal apertural features. Nevertheless, based on the 'mophological characteristics' alone, Seiglie et al (1993) placed Parkiella in the Turrilinidae Cushman 1927. The main argument for this allocation was that a taxon with such morphological characteristics would possess a toothplate and, therefore, should be placed in Turrilinidae (Seiglie et a/., 1993).…”

“…Nevertheless, based on the 'mophological characteristics' alone, Seiglie et al (1993) placed Parkiella in the Turrilinidae Cushman 1927. The main argument for this allocation was that a taxon with such morphological characteristics would possess a toothplate and, therefore, should be placed in Turrilinidae (Seiglie et a/., 1993). A close examination under the SEM elucidated some new apertural features in our Parkiella species.…”