Diductius


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

Distinguishing features: Protolith coccoliths with low, sloping rim; central area wide with a multiperforate net that may incorporate spine-bearing axial cross bars.


Daughter taxa: (blue => in age window 0-800Ma)
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.
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: Protolith coccoliths with low, sloping rim; central area wide with a multiperforate net that may incorporate spine-bearing axial cross bars.


Morphology remarks: 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.

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 Toarcian 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

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 de Géologie de la Faculté des Sciences de Lyon. 75: 33-57. gs


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Diductius compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-9-2019

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Short stable page link: http://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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