Nannotax3 - ntax_cenozoic - Lophodolithus rotundus

Lophodolithus rotundus

Classification: ntax_cenozoic -> Zygodiscales -> Zygodiscaceae -> Lophodolithus -> Lophodolithus rotundus
Sister taxa: L. acutus, L. luntii, L. mochlophorus, L. mytiliformis, L. nascens, L. reniformis, L. rotundus, L. sp.

PerchNielsen1977 pl28_fig2.JPG
PerchNielsen1977 pl28_fig3.JPG
BownNewsam 2017 pl08 16.JPG
Bown_2005_JNR_pl18-fig9.jpg
BownNewsam 2017 pl08 15.JPG
Bown_2005_JNR_pl18-fig10.jpg
Bown_2005_JNR_pl18-fig13.jpg
Bown_2005_JNR_pl18-fig14.jpg
Bown_2005_JNR_pl18-fig8.jpg
PerchNielsen1977 pl28_fig1.JPG
PerchNielsen1977 pl28_fig4.JPG

Taxonomy:

Citation: Lophodolithus rotundus Bukry & Percival, 1971

Rank: Species

Distinguishing features: Large to very large, broadly elliptical to subcircular Lophodolithus with a very broad (~half the length of the rim), near-symmetric wing at one end. No central area structures observed. Wing elements clearly visible in LM.

Farinacci & Howe catalog pages: L. rotundus *

Search data:

Tags	LITHS: murolith, asymmetric, elliptical, CA: ca_disjunct, bar, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
Metrics	Lith size: 10->23µm; Data source notes: lith size from OD & illustrated specimens

The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP15 zone (42.87-46.29Ma, top in Lutetian stage). Data source: Perch-Nielsen 1985b
First occurrence (base): within NP15 zone (42.87-46.29Ma, base in Lutetian stage). Data source: Perch-Nielsen 1985

Plot of occurrence data:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
Taxon plotted: Lophodolithus rotundus, synonyms included - Lophodolithus rotundus;
See also space-time plot :: Samples map :: Parent: Lophodolithus

References:

Bown, P. R. & Newsam, C. (2017). Calcareous nannofossils from the Eocene North Atlantic Ocean (IODP Expedition 342 Sites U1403–1411). Journal of Nannoplankton Research. 37(1): 25-60. gs V O

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 V O

Bukry, D. & Percival, S. F. (1971). New Tertiary calcareous nannofossils. Tulane Studies in Geology and Paleontology. 8: 123-146. gs V O

Perch-Nielsen, K. (1977a). Albian to Pleistocene calcareous nannofossils from the Western South Atlantic, DSDP Leg 39. Initial Reports of the Deep Sea Drilling Project. 39: 699-823. gs V O

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