Classification of the genus Zittelella

G. †Zittelella Ulrich and Everett 1889
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Zittelella grossa Rigby and Desrochers 1995
Zittelella pannosa Raymond and Okulitch 1940
Zittelella typicalis Ulrich and Everett 1890
Zittelella varians Billings 1861
Zittelella xinjiangensis Liu et al. 2003