Pontosphaera desuetoidea

Pontosphaera desuetoidea Bartol, 2010

Coccolithites anisotrema Kamptner, 1955, 16, figs. 22a–b, invalid according to ICN Art. 41 (when published combined with the invalid genus Coccolithites).

Pontosphaera anisotrema (Kamptner) Backman, 1980, p.54, invalid according to ICN Art. 41 (when published, combined with the invalid genus Coccolithites).

Pontosphaera species have low walls nearly equal in height to the distal cover over the proximal plate, producing a uniform interference colour in plan view under XPL. The proximal plate exhibits larger pores in the outer concentric cycle compared to the inner concentric cycles.

Backman, J. 1980. Miocene-Pliocene nannofossils and sedimentation rates in the Hatton-Rockall Basin, NE Atlantic Ocean. Stockholm Contributions in Geology 36: 1-91.

Bartol, M. 2010. Pontosphaera geminipora n. sp. and Pontosphaera desuetoidea n. sp., new calcareous nannoplankton species from the Middle Miocene of the Mura Depression (Slovenia, Central Paratethys). Micropaleontology. 56(6): 509-515

Kamptner, E. 1955. Fossile Coccolithineen-Skelettreste aus Insulinde. Eine mikropaläontologische Untersuchung. Verhandelingen der Koninklijke Nederlandse Akademie van Wetenschappen, Afdeling Natuurkunde. series 2, 50: 1-105.