Podorhabdus


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

Short diagnosis: Elliptical, rim broad; central area spanned by a granular bar supporting a broad, tall, hollow, flaring spine.


Daughter taxa (blue => in age window 0-300Ma)
Broadly elliptical to subcircular podorhabdid with central area spanned by a granular bar supporting a broad, tall, hollow, flaring spine.
Specimens not identified to species level

Taxonomy:

Citation: Podorhabdus Noël, 1965
Rank: Genus
Type species: Podorhabdus grassei Noël, 1965.
Notes & discussion: Most species originally described in this genus have since been removed to other genera so it is now essentially monospecific. P? elkefensis is very unlikely to be directly related to P. grassei so should be removed from the genus.

Farinacci & Howe catalog pages: Podorhabdus + *

Short diagnosis: Elliptical, rim broad; central area spanned by a granular bar supporting a broad, tall, hollow, flaring spine.


Morphology remarks: Described by Noël (1965) as having four ‘pillars’ but the type species holotype image shows just two (see discussion in Wise and Wind, 1977). Furthermore, Podorhabdus grassei may be a junior synonym of Rhabdolithus patulus Deflandre, 1954, which was designated the type species of Discorhabdus by Noël (1965).

Geological Range:
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): within Aalenian Stage (170.30-174.15Ma, base in Aalenian 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. (Editor), Calcareous nannofossil biostratigraphy. British Micropalaeontological Society Publication Series. Chapman & Hall, pp. 34-85.

Deflandre, G. & Fert, C., (1954). Observations sur les coccolithophoridés actuels et fossiles en microscopie ordinaire et électronique. Annales de Paléontologie, 40: 115-176.

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

Wise, S.W. & Wind, F.H., (1977). Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 36 drilling on the Falkland Plateau, south-west Atlantic sector of the Southern Ocean. Initial Reports of the Deep Sea Drilling Project, 36(269-491).


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Podorhabdus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-1-2018

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