Nannotax3 - ntax_mesozoic - Diductius

Diductius


Classification: ntax_mesozoic -> Stephanolithiales -> Parhabdolithaceae -> Diductius
Sister taxa: Bucanthus, Calcivascularis, Crucirhabdus, Diductius, Mitrolithus, Parhabdolithus, Timorella, Umbria

Distinguishing features:
Parent taxon (Parhabdolithaceae): Murolith (protolith type) coccoliths with bicylic rims and central-areas spanned by an axial-cross or transverse bar bearing a broad, often long, spine.
This taxon: Protolith coccoliths with low, sloping rim; central area wide with a multiperforate net that may incorporate spine-bearing axial cross bars.


Daughter taxa (time control age-window is: 0-800Ma)
Diductius constans
Coccoliths with a low, narrow, sloping protolith rim and a wide central area with a multiperforate net that may incorporate spine-bearing axial cross bars. Bicyclic rim image in XPL.
Diductius sp.
Specimens not identified to species level

Taxonomy:

Citation: Diductius Goy in Goy et al., 1979
Rank: Genus
Type species: Diductius constans Goy in Goy et al., 1979

Farinacci & Howe catalog pages: Diductius *

Distinguishing features:
Parent taxon (Parhabdolithaceae): Murolith (protolith type) coccoliths with bicylic rims and central-areas spanned by an axial-cross or transverse bar bearing a broad, often long, spine.
This taxon: Protolith coccoliths with low, sloping rim; central area wide with a multiperforate net that may incorporate spine-bearing axial cross bars.


Morphology:

Protolith coccoliths with low, sloping rim and a wide central area with a multiperforate net that may incorporate spine-bearing axial cross bars. Bicyclic rim image in XPL.

Size:


Ecology & Biogeography


Biology & life-cycles

Phylogenetic relations

Search data:
LITHS: murolith, elliptical, CA: cross-axial, ca_disjunct, grill, process, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
Lith size: 4->7µm;
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

See also: Thurmannolithion - rather similar genus in the Stephanolithiaceae;

Geological Range:
Last occurrence (top): in lower part of Bajocian Stage (28% up, 169.7Ma, in Bajocian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Toarcian Stage (0% up, 182.7Ma, in Pliensbachian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Bown, P. R. & Cooper, M. K. E. (1998). Jurassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 34-85. gs O

Goy, G., Noël, D. & Busson, G. (1979). Les conditions de sédimentation des schistes-carton (Toarcien inf.) du bassin de Paris déduites de l'étude des nannofossiles calcaires et des diagraphies. Documents des laboratories de géologie Lyon. 75: 33-57. gs O


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Diductius compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 2-12-2022

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10375 Go to Archive.is to create a permanent copy of this page - citation notes



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