Daughter taxa (time control age-window is: 0-800Ma) | Granddaughter taxa | ||||
Acanthoica Body coccoliths with well-developed radial lath cycle, low mound in centre; coccospheres polymorphic, usually some coccoliths with well-developed spines | Acanthoica quattrospina Acanthoica acanthifera Acanthoica acanthos Acanthoica biscayensis Acanthoica janchenii Acanthoica maxima Acanthoica sp A Acanthoica backmanii Acanthoica cohenii Acanthoica laffittei Acanthoica sp. | ||||
Algirosphaera Body coccoliths with well-developed radial lath cycle; domal or double-lipped protrusion; coccosphere dimorphic, CFCs larger and taller | Algirosphaera cucullata Algirosphaera fabaceus Algirosphaera meteora Algirosphaera robusta Algirosphaera sp. | ||||
Blackites Coccoliths process-bearing with complex base including outer rim, radial lath and lamellar cycles | |||||
Cyrtosphaera Body coccoliths with well-developed radial lath cycle, protrusion in centre; coccospheres varimorphic higher protrusions on circum-flagellar coccoliths | |||||
Discosphaera Body coccoliths with well-developed radial lath cycle; trumpet-like process; coccospheres monomorphic | |||||
Palusphaera Coccoliths without radial lath cycle; coccospheres monomorphic, all spine-bearing | |||||
Rhabdosphaera Coccoliths without radial lath cycle; coccospheres dimorphic, only some spine-bearing | Rhabdosphaera clavigera Rhabdosphaera gracilenta Rhabdosphaera poculii Rhabdosphaera vitrea Rhabdosphaera xiphos Rhabdosphaera sp. | ||||
Solisphaera Coccoliths without radial lath cycle; coccosphere dome-shaped, polymorphic | Solisphaera blagnacensis Solisphaera emidasia Solisphaera helianthiformis Solisphaera galbula Solisphaera turbinella Solisphaera tegula Solisphaera palmula Solisphaera miocaenica Discoturbella moori Solisphaera sp. |
Taxonomy:
Distinguishing features:
Parent taxon (Syracosphaerales): 2N: Coccoliths with radial lath cycle of T-units, and disjunct, often complex, axial structure, coccospheres often polymorphic, usually motile
N: Form holococcoliths, highly variable
This taxon: BCs planoliths with radial lath cycle and highly-variable axial structures. Often polymorphic and/or varimorphic
Farinacci & Howe catalog pages: Rhabdosphaeraceae *
Morphology:
Coccoliths: Typically disc-shaped (planoliths) and formed of three components.
Biology & life-cycles
Lith size: 1->30µm; |
Geological Range:
Notes: Most extant Rhabdosphaeraceae are very small and, apart from R. clavigera, are rarely recorded in the fossil record. There is, however, a diverse and abundant group of larger Rhabdosphaeraceae in the Eocene (see also Perch-Nielsen 1985b; Varol 1989; Shafik 1989; Aubry 1999, Bown 2005).
Last occurrence (top): Extant. Data source: Total of ranges of the species in this database
First occurrence (base): within NP5 zone (59.54-61.51Ma, base in Selandian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Aubry, M. -P. (1999). Handbook of Cenozoic calcareous nannoplankton. Book 5: Heliolithae (Zygoliths and Rhabdoliths). Micropaleontology Press, American Museum of Natural History, New York. 1-368. gs Bown, P. R. (2005d). Palaeogene calcareous nannofossils from the Kilwa and Lindi areas of coastal Tanzania (Tanzania Drilling Project 2003-4). Journal of Nannoplankton Research. 27(1): 21-95. gs O Bown, P. R. (2010). Calcareous nannofossils from the Paleocene/Eocene Thermal Maximum interval of southern Tanzania (TDP Site 14). Journal of Nannoplankton Research. 31(1): 11-38. gs O Haeckel, E. (1894). Systematische Phylogenie der Protisten und Pflanzen. Reimer, Berlin. -. gs Kleijne, A. (1992). Extant Rhabdosphaeraceae (coccolithophorids, class Prymnesiophyceae) from the Indian Ocean, Red Sea, Mediterranean Sea and North Atlantic Ocean. Scripta Geologica. 100: 1-63. gs Perch-Nielsen, K. (1985). Cenozoic calcareous nannofossils. In, Bolli, H. M., Saunders, J. B. & Perch-Nielsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge (1): 427-555. gs Probert, I., Fresnel, J., Billard, C., Geisen, M. & Young, J. R. (2007). Light and electron microscope observations of Algirosphaera robusta (Pymnesiophyceae). Journal of Phycology. 43: 319-332. gs Shafik, S. (1989). Some new calcareous nannofossils from Upper Eocene and Lower Oligocene sediments in the Otway Basin, southeastern Australia. Alcheringa. 13: 69-83. gs Varol, O. (1989b). Eocene calcareous nannofossils from Sile (northwest Turkey). Revista Española de Micropaleontología. 21: 273-320. gs References:
Rhabdosphaeraceae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 12-11-2024
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1201 Go to Archive.is to create a permanent copy of this page - citation notes |
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