Amaurolithus tricorniculatus

Classification: Coccolithophores -> Nannolith families inc sed -> Ceratolithaceae -> Amaurolithus -> Amaurolithus tricorniculatus
Sister taxa: A. brevigracilis, A. delicatus, A. primus, A. tricorniculatus, A. sp.,


Citation: Amaurolithus tricorniculatus (Gartner, 1967) Gartner and Bukry, 1975
Rank: Species
Basionym: Ceratolithus tricorniculatus Gartner, 1967
Variants: A. bizzarus (Bukry, 1973) Gartner and Bukry, 1975 [Ceratolithus] - an ornate variant of A. tricorniculatus, with additional spines. (NB In the original publication the species-name was spelt bizzarus, so it cannot be corrected to bizarrus, even though that would appear a more logical spelling).

Distinguishing features: Right arm extended into apical spur.

Farinacci & Howe catalog pages: Ceratolithus tricorniculatus + * , Ceratolithus bizzarus * , ,

Search data:
TagsLITHS: nannolith-other, horseshoe-shaped, RIM: spine(s),
CSPH: not known, V-UNITS: all, DETAILS: 1ou,
MetricsLith size: 5->10µm; Segments: 1->1;
Sources: lith width from illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): at top of NN14 zone (100% up, 3.9Ma, in Zanclean stage). Data source: zonal marker, with A. delicatus, (see e.g. Young 1998)
First occurrence (base): within NN11b subzone (6.91-7.42Ma, base in Tortonian stage). Data source: Young 1998 - - Raffi et al. (1998) report FAD later, in NN12.

Plot of occurrence data:

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Amaurolithus tricorniculatus, synonyms included - Amaurolithus bizarrus; Amaurolithus bizzarus; Amaurolithus tricorniculatus; Ceratolithus bizzarus; Ceratolithus tricorniculatus; Ceratolithus tricorniculatus group; space-time plot :: Samples map :: Parent: Amaurolithus


    Bukry, D. (1973a). Coccolith stratigraphy, eastern equatorial Pacific, Leg 16, Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project. 16: 653-711. gs

    Gartner, S. & Bukry, D. (1975). Morphology and phylogeny of the coccolithophycean family Ceratolithaceae. Journal of Research of the United States Geological Survey.. 3: 451-465. gs

    Gartner, S. (1967a). Calcareous nannofossils from Neogene of Trinidad, Jamaica, and Gulf of Mexico. Paleontological Contributions. University of Kansas. 29: 1-7. gs

    Raffi, I., Backman, J. & Rio, D. (1998). Evolutionary trends of tropical calcareous nannofossils in the late Neogene. Marine Micropaleontology. 35(1): 17-41. gs

    Young, J. R. (1998). Neogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 225-265. gs


    Amaurolithus tricorniculatus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-7-2019

    Taxon Search:
    Advanced Search

    Short stable page link: Go to to create a permanent copy of this page - citation notes

    Comments (0)

    No comments yet. Be the first!

    Add Comment

    * Required information
    Captcha Image
    Powered by Commentics