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Downiesphaeridium polyacanthum

Downiesphaeridium polyacanthum (Gitmez, 1970, p.284-286, pl.12, fig.10; text-fig.22) Islam, 1993, p.84.

TYPE: Holotype: Gitmez, 1970, pl.12, fig.10; text-fig.22b.

HISTORY: Originally Cleistosphaeridium, subsequently Cleistosphaeridium?, thirdly (and now) Downiesphaeridium.

SYNONYM(S): Taxonomic senior synonym: Baltisphaeridium (as Cleistosphaeridium) iaculigerum, according to Brenner (1988, p.42) - however, Islam (1993, p.84) retained Downiesphaeridium polyacanthum.

AGE: Early Kimmeridgian.


Infraspecific taxa:


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