Synonym
Dioon tomasellii var. tomasellii
Published in: Brittonia 36(3): 225-227. 1984. (Brittonia 
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Type Information
This name is considered a Synonym of Dioon tomasellii De Luca, Sabato & Vázq.Torres
Nomenclatural notes: Autonym established by the publication of Dioon tomasellii var. sonorense De Luca, Sabato & Vázq.Torres in Brittonia 36(3): 225-227. 1984.