Retesphaera


Classification: non_cocco -> Dinophytes -> Thoracosphaeraceae -> Oblique wall -> Retesphaera
Sister taxa: Calcicarpinum, Melodomuncula, Pernambugia, Pirumella, Retesphaera,

Daughter taxa: (blue => in age window 0-800Ma)

Taxonomy:

Citation: Retesphaera Hildebrand-Habel, Willems & Versteegh 1999
Rank: Genus
Type species: Retesphaera diadema Hildebrand-Habel, Willems & Versteegh 1999

Catalog entries: Retesphaera

Original description: Monocarinate calcareous dinoflagellate cysts charac- terized by a spherical to antapically, conically lengthened central body. A circlet-like rim of coarser crystallites frames the apical side of the central body. The single-layered wall consists of small idiomorphous rhombohedrons in irregular orientation. The crystallites are arranged around pores, thus forming reticular distal and proximal surface sculptures. The circular archaeopyle has an apical orientation and is probably formed by the release of the paraplate 3'.

Geological Range:
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): within Maastrichtian Stage (66.04-72.05Ma, base in Maastrichtian stage). Data source: Total of range of species in this database

References:

Hildebrand-Habel, T., Willems, H. & Versteegh, G. J. M. (1999). Variations in calcareous dinoflagellate associations from the Maastrichtian to Middle Eocene of the western South Atlantic Ocean (São Paulo Plateau, DSDP Leg 39, Site 356). Review of Palaeobotany and Palynology. 106: 57-87. gs


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Retesphaera compiled by Jeremy R. Young viewed: 20-9-2019

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=20418 Go to Archive.is to create a permanent copy of this page - citation notes



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