Classification of the genus Callispira
G. †Callispira Nelson 1947
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†Callispira bellula Mazaev 2003
†Callispira grossa Hoare et al. 1997
†Callispira novemcostata Nelson 1947
†Callispira okaensis Mazaev 2003
†Callispira quinquecostata Nelson 1947
†Callispira taosiformis Mazaev 2019
†Callispira tricostata Mazaev 2011