-
radula is
heterodont (or heteroglossan),
featuring a
multicuspid central rhachidian tooth and
unicuspid lateral teeth.
Vitreledonella richardi is
found in...
- and the
shape of the
teeth agrees with that of the
known species. The
rhachidian tooth has a
subquadrate body,
narrower in front, with a
concave upper...
- The jaws are
developed or absent. The
radula is rhipidoglossate. The
rhachidian teeth are
always present and well-developed. The
lateral teeth generally...
- the
median rows, and
cross even the
uncini of the
opposite side. The
rhachidian or
median tooth has a
subquadrate basal part, with rounded,
convex posterior...
-
concave at the
outer side. The
radula has the
teeth in
about 48 rows. The
rhachidian tooth (R) has a
rounded body, with
crooked hooks at the
angles of the...
-
basal margin. The
operculum is very thin, corneous, with few whorls. The
rhachidian tooth (R) of the
radula has a
subquadrate body, with
rounded posterior...
- It is
closely applied to the s****. The long
radula has a long,
narrow rhachidian tooth. It is
lanceolate with its tip
narrowand recurved.
There are 26...
- (Geb. der Schnecken, ii, pi. 20, fig. 7),
except that the
bases of the
rhachidian and
lateral teeth are subcircular, and on a few of the scythe-shaped cusps...
-
perhaps by erosion. The
inside of the s**** has a
smooth surface. The
rhachidian tooth of the
radula is
elongate with
convex sides. It has no reflected...
- horseshoe-shaped and
interrupted in front. The
radula has a
large simple rhachidian tooth with, on each side, two large,
simple transverse laterals, followed...
