Nannotax3 - ntax_mesozoic - Ceratolithoides

Ceratolithoides


Classification: ntax_mesozoic -> Nannoliths inc sedis -> Nannoliths inc sed - other -> Ceratolithoides
Sister taxa: Ceratolithina, Ceratolithoides, Liliasterites, Marthasterites, Orthogonoides, Rhomboaster, Tripinnalithus, Watkinsia

Distinguishing features:
Parent taxon (Nannoliths inc sed - other): Nannolith genera without clear affinities to any other genera
This taxon: Conical, arrowhead- or horseshoe-shaped nannoliths. Constructed from two basal rectangular to rhombic elements and a narrow, apical, conical structure.


Daughter taxa (time control age-window is: 0-800Ma)
Group I of Burnett 1997 - >2 horns
Ceratolithoides verbeekii
Conical shaped with 6 horns
Group II of Burnett 1997 - arrowhead shaped with cone largely free of horns
Ceratolithoides aculeus
Arrowhead shaped with distinct cone and base; inter horn angle ca 90°; medium to large size
Ceratolithoides brevicorniculans
Arrowhead shaped with small horns; inter horn angle >90°; medium size
Ceratolithoides sagittatus
Arrowhead shaped with rhombic basal elements; cone protrudes above base, formed of two elements; small
Group III of Burnett 1997 - horseshoe-shaped with cone free from horns
Ceratolithoides arcuatus
Horsehoe shaped; cone short, protruding from top of horns; small to medium size
Ceratolithoides quasiarcuatus
Sub-horsehoe shaped; cone long, protruding from top of horns; medium to large size
Ceratolithoides sesquipedalis
Arrowhead shaped; cone very long, protruding from top of horns; large size
Group IV of Burnett 1997 - Cone almost entirely enclosed by the horns
Ceratolithoides indiensis
Blocky-subconical shape; cone long, enclosed within horns; inter horn angle >90°; medium size
Ceratolithoides longissimus
Elongate sub-arrowhead shape; cone long, enclosed within horns; inter horn angle >>90°; large size
Ceratolithoides perangustus
Elongate shape; cone, narrow enclosed within horns; small size
Ceratolithoides prominens
Arrowhead shape; cone long, partially protruding above horns; inter horn angle >>90°; medium to large size
Ceratolithoides ultimus
Blocky-squarish shape; cone long, narrow, parallel sided, enclosed with in horns; small size
Ceratolithoides dongenii
Triangular outline; cone prominent, almost entirely enclosed by horns, half length of nannolith; medium sized
Ceratolithoides ohalloraniae
Near triangular outline; cone extends halfway down nannolith, enclosed within horns; small size
Group V of Burnett 1997 - Cone small or absent
Ceratolithoides kamptneri
Horseshoe-shaped with elongate slender horns; inter-horn angle about 90°; cone very small; small to medium
Ceratolithoides amplector
Blocky-horseshoe shaped outline; inter-horn angle about 90°; cone very small; medium to large
Ceratolithoides pricei
Blocky-squarish outline; cone very small; large
Ceratolithoides self-trailiae
Blocky-squarish outline; cone very small; small
Ceratolithoides sp.
Specimens not identified to species level

Taxonomy:

Citation: Ceratolithoides Bramlette & Martini, 1964
Rank: Genus
Type species: Ceratolithoides kamptneri Bramlette & Martini, 1964
Taxonomic discussion: Traditionally only the species C. verbeekii, C. aculeus, C. kamptneri and C. arcuatus were used. Burnett 1997 has introduced many further species as detailed above.

Farinacci & Howe catalog pages: Ceratolithoides *

Distinguishing features:
Parent taxon (Nannoliths inc sed - other): Nannolith genera without clear affinities to any other genera
This taxon: Conical, arrowhead- or horseshoe-shaped nannoliths. Constructed from two basal rectangular to rhombic elements and a narrow, apical, conical structure.


Morphology:


Size:


Ecology & Biogeography


Biology & life-cycles

Phylogenetic relations

Search data:
LITHS: nannolith-other, horseshoe-shaped, triangular, CROSS-POLARS: R-prominent,
Lith size: 3->10µm;
Data source notes: size range of included species
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 Maastrichtian Stage (100% up, 66Ma, in Danian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Campanian Stage (0% up, 83.6Ma, in Campanian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Bramlette, M. N. & Martini, E. (1964). The great change in calcareous nannoplankton fossils between the Maestrichtian and Danian. Micropaleontology. 10(2): 291-322. gs

Burnett, J. A. (1997b). New species and conjectured evolutionary trends of Ceratolithoides Bramlette and Martini, 1964 from the Campanian and Maastrichtian of the Indian Ocean. Journal of Nannoplankton Research. 19(2): 123-131. gs V O

Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 132-199. gs O


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Ceratolithoides compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 4-12-2022

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10223 Go to Archive.is to create a permanent copy of this page - citation notes



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