-
riblets on its
penultimate whorl and 21 to 24 ribs on its last whorl. The
collabral threads are weak. On the base of the body
whorl one can see 12 to 13 spiral...
-
relatively small median sinus in the
upper margin of the aperture, and
collabral (transverse) or
spiral (longitudinal)
threads covering the s****. The...
-
gastropod mollusks in the
family Seguenziidae. The
turbinate s**** has
collabral axial riblets and
lacks a
peripheral carina.
There is no
midwhorl angulation...
-
shape of the s**** is conical. It has a
peripheral carina and sharp,
collabral axial riblets.
There is no microsculpture. All
whorls possess midwhorl...
- ribs on its
penultimate whorl and 21 to 24 ribs on its last whorl. The
collabral threads are strong. On the base of the body
whorl one can see 7 to 9 spiral...
-
surrounding its aperture, and
instead possesses a thin
peristome with a
collabral callus ridge on the
palatal wall. In all of the
specimens studied, a broad...
- Color-wise, it is yellowish-white dorsally, with base yellowish-white and
collabral lines of
chocolate brown. The
callus is white. The
columella is white...
-
callus wash or weak
parietal callus deposits in some species, but
lacking collabral parietal callus ridge.
Columella multiplicate, with
combined total 2 to...
- shouldered,
rarely having subsutural angulation. The
sculpture of
strong collabral growth lines,
later whorls having numerous weak
spiral striae. The aperture...
- soft body in
these species. The
conical s**** has
peripheral carina and
collabral axial riblets. All
whorls contain midwhorl angulation but
spiral lirae...
