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Key Position: 14 Back to (13a)
14 a. Test almost biconical, narrowing towards aperture, widest at fundus with one or more spines.

SEE Figure 14-1

14 b. Test subcylindrical, fundus with single spine.

Proceed to 15

FIGURE 14-1

Difflugia protaeiformis Lamarck 1816 "amphoralis"
Difflugia protaeiformis LAMARCK 1816, p. 95
Difflugia amphoralis HOPKINSON in CASH and HOPKINSON 1909, p. 43, pl. 21, fig. 13
Difflugia protaeiformis "amphoralis" REINHARDT et al. 1998, pl. 2, fig. 4
Remarks: Distinguished from Difflugia protaeiformis "claviformis" and Difflugia protaeiformis "acuminata" by having a prominent widening of the fundus at the aboral end.
Specimen from Peterson Lake, near Cobalt, Ontario.

14a