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Rhagodiscus asper
Mesozoic taxa
Rhagodiscus asper
Edited by Paul Bown on Sun, 18/03/2012 - 11:32
Citation:
Rhagodiscus asper (Stradner, 1963) Reinhardt, 1967
Basionym:
Discolithus asper Stradner, 1963
Diagnosis:
Murolith (loxolith) coccoliths with a relatively broad central area spanned by a granular plate that normally bears a hollow spine or spine base; the rim appears unicyclic in LM.
Remarks:
Often common. Considerable morphological variation is observed within this species concept, and this is reflected in the number of species names that have been applied to similar morphotypes that in many cases may be synonyms (e.g., R. reightonensis [Taylor, 1978] Watkins in Watkins and Bowdler 1984 [wider rim]; R. eboracencis Black 1971 [no spine]; ‘Rhabdolithina’ swinnertoni Black, 1971 [large spine]; and ‘Zygolithus’ fenestratus Stover 1966 [perforate plate]).
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Mesozoic: Rhagodiscus asper
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