Daughter taxa (time control age-window is: 0-800Ma)![]() | ||||
Palusphaera vandelii Long (>10 µm) delicate tapering spines without collar. Basal disk circular (ca 2µm), with broad rim on distal side. | ||||
Palusphaera probertii Like P. vandelii but basal disks smaller (ca 1.5 µm long), elliptical, and with narrow rim. | ||||
Palusphaera crosiae Form with robust spines and maximum spine thickness approximately 1/3 up spine. | ||||
Palusphaera bownii Spines, trumpet-like, low, open and flaring distally | ||||
Palusphaera sp. Specimens which cannot be assigned to established species |
Taxonomy:
Genus
coccolith types on coccosphere
curvature of rows of lamellar elements
Palusphaera
(4 extant species)monomorphic
(all coccoliths have spines)Dextrogyre in distal view
Laevogyre in proximal view
Rhabdosphaera
(2 extant species)dimorphic
(some coccoliths lack spines)Laevogyre in distal view
Dextrogyre in proximal view
Distinguishing features:
Parent taxon (Rhabdosphaeraceae): BCs planoliths with radial lath cycle and highly-variable axial structures. Often polymorphic and/or varimorphic
This taxon: Coccoliths without radial lath cycle; coccospheres monomorphic, all spine-bearing
Farinacci & Howe catalog pages: Palusphaera + *
Search data:
LITHS: planolith, elliptical, circular, CA: ca_disjunct, process, CSPH: equant, monomorphic, |
Lith size: 8->12µm; |
Geological Range:
Last occurrence (top): Extant. Data source: Total of ranges of the species in this database
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Archontikis, O. A. & Young, J. R. (2021). A reappraisal of the taxonomy and biodiversity of the extant coccolithophore genus Palusphaera (Rhabdosphaeraceae, Prymnesiophyceae). Phycologia. 60: 589-602. gs Lecal, J. (1965). A propos des modalités d'élaboration des formations épineuses des Coccolithophoridés. Protistologica. 1: 63-70. gsReferences:
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Palusphaera compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-2-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=984 Go to Archive.is to create a permanent copy of this page - citation notes |
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