Ethmorhabdus


Classification: Mesozoic -> Podorhabdales -> Axopodorhabdaceae -> Ethmorhabdus
Sister taxa: Podorhabdus, Hemipodorhabdus, Axopodorhabdus, Tetrapodorhabdus, Hexapodorhabdus, Octocyclus, Octopodorhabdus, Dodekapodorhabdus, Perissocyclus, Teichorhabdus, Cribrosphaerella, Ethmorhabdus, Nephrolithus, Psyktosphaera, Cribrocorona,

Distinguishing features: Elliptical, narrow rim; central area wide, spanned by multiperforate net, with or without axial cross and spine.


Daughter taxa: (blue => in age window 0-800Ma)
Small (4-6 µm) Ethmorhabdus with two cycles of relatively large perforations (20-30 in total).
Medium (5-8 µm) Ethmorhabdus, with prominent axial cross bars as well as net.
Medium (7-9 µm) Ethmorhabdus with finely perforate net.
Large (8-12 µm) Ethmorhabdus with finely perforate net, outline often irregular, spine absent
Specimens not identified to species level

Taxonomy:

Citation: Ethmorhabdus Noël, 1965
Rank: Genus
Type species: Ethmorhabdus gallicus Noël, 1965

Farinacci & Howe catalog pages: Ethmorhabdus *

Distinguishing features: Elliptical, narrow rim; central area wide, spanned by multiperforate net, with or without axial cross and spine.

Search data:
TagsLITHS: placolith, elliptical, CA: grill, plate, process, closed, V-UNITS: V-prominent, R-UNITS: R-prominent, DETAILS: rim-bicyclic,
MetricsLith size: 4->12µm;
Sources: 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 Barremian Stage (100% up, 126.3Ma, in Barremian 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

Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Early Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 86-131. gs

Noël, D. (1965). Sur les Coccolithes du Jurassique Européen et d'Afrique du Nord. Éditions du Centre National de la Recherche Scientifique, Paris. -. gs


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Ethmorhabdus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-2-2020

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10439 Go to Archive.is to create a permanent copy of this page - citation notes



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