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1 record found in the Index Nominum Genericorum database.

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Diacritical Conversion

Helosphaeridium T. R. Lister, Palaeontogr. Soc. (London) Publ. 528: 76. Nov 1970.
T.: H. clavispinulosum T. R. Lister
Middle Silurian (Ludlovian).
FOSSIL-ACRITARCHA (2) 9 Feb 1996

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