SEE Figure 11-1
Cucurbitella
tricuspis (Carter 1856)
Difflugia tricuspis CARTER 1856, p. 221, fig. 80
Cucurbitella tricuspis (Carter) MEDIOLI, SCOTT,
and ABBOTT, 1987,
p. 42, pls. 1-4, text figs. 1, 4
Cucurbitella tricuspis (Carter) REINHARDT et al.
1998, pl. 1, fig. 7
Remarks: This species has a seasonally controlled
irregularly shaped test, being larger and spherical
during the benthic phase, and smaller and vase-shaped
during the planktic phase. The crenulated aperture has a
variable number of teeth ranging from three to twenty,
depending on the number of teeth on the parent test
(Medioli, personal commun., 1996).
Specimen from Peterson Lake, near Cobalt, Ontario.
