Key Position: 12 Back to (11b)
12 a. Test elongated, pyriform, fundus bulbous and wide, with distinct tapering neck with a prominent constriction at its base.

SEE Figure 12-1

 12 b. Test ovoid, pyriform or acuminate, constriction at the base of the neck may or may not be present.

Proceed to 13

FIGURE 12-1

Lagenodifflugia vas (Leidy 1874)
Difflugia vas LEIDY 1874, p. 155
Lagenodifflugia vas (Leidy) MEDIOLI and SCOTT 1983, p. 33, pl. 2, figs. 18-23, 27, 28
Lagenodifflugia vas (Leidy) REINHARDT et al. 1998, pl. 1, fig. 8
Specimen from Peterson Lake, near Cobalt, Ontario.