ravenelii to Cryphaea so that the genus included both species with single and double peristome
. Rao (2001) proposed the genus Monocryphaea to accommodate this last species.
Conical straight free tube parts with well-developed transverse ornamentation in form of peristomes
with the regularly undulating edge.
complete, mostly somewhat higher than wide, PH: PW 0.96-1.16 in available specimens, median 1.11, in holotype 1.05.
The shell bears a large, wide aperture surrounded by a wide, thick, reflected peristome
that may be free from (Fig.
Any parts around the mouth or oral opening of invertebrates (comparable to lips).
well developed; exostome yellowish, lower outside ornamentation dotted (reticulate at high magnification), upper outside ornamentation papillose, border broad; endostome hyaline, basal membrane high, 40-45% of endostome height, segments narrowly perforated, finely papillose, cilia 2-4, long, nodose.
As the new tube emerged from the hole, it was initially directed upward at an angle of about 45 degrees from the parent's tube, continuous With the peristome
formed by the parent immediately prior to constructing the escape hatch (Fig.
double, exostome cross-striolate below, papillose above; endostome segments papillose, membrane basal high, cilia none.
holotype entire (peristome
of other shells damaged, PW measurements not accurate).
Surrounding most of the opening of the pitcher is a swollen portion of tissue called the peristome
or "lip." Nectar is commonly found on the lip and other surfaces of the pitcher (Schnell, 2002).
Protoconch sculpture nude, or with difuse radial wrinkles; radial ribs thick, without spiral striation; pyramidal shell; peristome
sharp, keel-like, resembling a sophonostoma Chellius piramidalis sp.n.
well developed; exostome yellowish, brownish towards base, lower outside ornamentation cross-striolate, upper outside ornamentation papillose, border broad, widened where ornamentation changes from cross-striolate to papillose; endostome hyaline to yellowish, basal membrane high, about 35-40% of endostome height, segments perforated, papillose, cilia 2-3, long, appendiculate at least in upper part of cilia, otherwise nodose.