Crassimarginata crassicosta (FOSSIL) Jhaveri, 1969 †
Crassimarginata incerta (FOSSIL) (Spitz, 1907 †)
Yukonoconcha pedderi (FOSSIL) Frýda & al., 2002 †
Crassimarginata tenuicosta (FOSSIL) Jhaveri, 1969 †