Daughter taxa (time control age-window is: 0-800Ma)![]() | ||||
![]() | Ellipsolithus anadoluensis Elliptical to oblong Ellipsolithus with well separated shields and high tube that is highly birefringent in XPL. Thin finely perforate central area plate is not visible in LM. | |||
Ellipsolithus aubryae Large, elliptical to oblong Ellipsolithus with wide central area spanned by a perforate plate with two rings of small perforations. | ||||
Ellipsolithus bollii Elliptical Ellipsolithus with central area plate with small perforations. | ||||
![]() | Ellipsolithus distichus Moderate to large, oblong Ellipsolithus with thin, finely perforate proximal central area plate and additional distal bars that form the birefringent net (8-16 large holes) that is clearly visible in LM. | |||
Ellipsolithus lajollaensis Elliptical to oblong Ellipsolithus with narrow central area spanned by plate with small perforations. | ||||
Ellipsolithus macellus Moderate to large elliptical to oblong Ellipsolithus with conjunct, birefringent central area plate. | ||||
Ellipsolithus pumex Medium-sized Ellipsolithus with relatively wide central area (width similar to the rim width) spanned by a finely perforate plate. | ||||
Ellipsolithus sp. Specimens which cannot be assigned to any established species |
Taxonomy:
Distinguishing features: Elliptical to oblong placoliths with shields formed from numerous narrow elements and central areas spanned by plates that may be perforate.
Farinacci & Howe catalog pages: Ellipsolithus + *
Size: Coccoliths medium-sized to very large (6-14 µm). All species similar size except E. aubryae (consistently >10 µm long)
Tags | LITHS: placolith, elliptical, CA: ca_conjunct, plate, pores, CROSS-POLARS: rim-unicyclic, R-prominent, |
Metrics | Lith size: 6->14µm; |
Geological Range:
Last occurrence (top): in upper part of Lutetian Stage (74% up, 42.9Ma, in Lutetian stage). Data source: Total of range of species in this database
First occurrence (base): in upper part of Danian Stage (63% up, 63.2Ma, in Danian stage). Data source: Total of range of species in this database
Plot of occurrence data:
Perch-Nielsen, K. (1985a). Cenozoic calcareous nannofossils. In, Bolli, H. M., Saunders, J. B. & Perch-Nielsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge 427-555. gs Sullivan, F. R. (1964). Lower Tertiary nannoplankton from the California Coast Ranges. I. Paleocene. University of California Publications in Geological Sciences. 44: 163-227. gsReferences:
![]() |
Ellipsolithus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 1-3-2021
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=523 Go to Archive.is to create a permanent copy of this page - citation notes |