There is no umbilicus . The animal is destitute of an operculum. The protoconch whorls are deep chestnut-brown, very minutely ...
There is no umbilicus. The peristome is slightly produced below. The columella has a heavy white callus. The operculum is ...
The umbilicus is narrow. The aperture is subcircular. The peristome is discontinuous, thickened and expanded. There is short ...
The umbilicus is closed. The circular aperture has a strongly reflected lip and an operculum is present. The snail is common ...
The umbilicus is profound. This marine species occurs off Japan and the Philippines Souverby, Journ. de Conchyl. 1875, p. 39, t ...
... that bordering the umbilicus is the strongest. The funnel-shaped umbilicus is pervious. Its largest diameter occupies about 2/5 ... The umbilicus is large. The shell (not adult) consists of about 5 slightly convex whorls, with a conspicuous suture. The ...
The umbilicus is narrow. Juveniles are paler with weaker ribs at the lower side, and the umbilicus relatively wider. This ...
The umbilicus is small. This genus occurs in Madagascar. Species within the genus Kalidos include: Kalidos aequivocus (Robson, ...
Its umbilicus is narrow. The shell contains 2½ whorls, slightly flattened at the periphery and then rounded. The sculpture ...
The umbilicus is closed. This snail lives in bodies of freshwater. Seddon M. B. (2011). "Stagnicola fuscus". The IUCN Red List ...
The umbilicus is narrow. The size of the shell is extremely small (about 2.1 mm wide at three whorls). The width of the shell ...
The umbilicus is small. The aperture is round. This marine species was found as a fossil in the Lower Claiborne Eocene, Texas. ...
The umbilicus is subperforate. Fossils of this marine species were found in California Fossilworks: Turris kirkensis B. L. ...
The umbilicus is carinated. The aperture is scarcely indented by the parietal margin. The acute peristome is nearly continuous ...
There is no umbilicus. The columella and inner whorls are dissolved. Species in the genus Theodoxus are highly variable in size ...
... umbilicus small and deep; suture with deep narrow ventral lobe, large V-shaped lateral lobes on either side followed by rounded ...
The umbilicus is narrow. This species occurs in the following locations: European waters (ERMS scope) (Barents Sea; Okhotsk Sea ...
The umbilicus is wide. Its perspective shows all the whorls. This marine species is endemic to New Zealand. Suter (1908), ...
The umbilicus is lacking. The columella has no tooth, but only an indistinct fold. This species occurs in the Atlantic Ocean ...
The umbilicus is faint. The pyriform aperture is quite large. The posterior angle is obtuse. The outer lip is moderately thick ...
The umbilicus is narrow. Some specimens are beaded below the sutures, and there is some variation in the width of the umbilical ...
The umbilicus is narrow. The animal can lock itself in behind a round lid which shows concentric striations (the operculum). ...
Umbilicus large and obvious. About eight strong, equal-sized ridges spiral around each whorl and corrugate the outer lip. ...
They lack an umbilicus. Their spiral whorls are flat to slightly convex. The first three spiral cords can show some sculpture ...
Whorls are generally smooth, evenly rounded and slightly overlapping; umbilicus deep, aperture ovate. Is the oldest known ...
The umbilicus is covered. This species occurs in the Northwest Pacific Ocean. Chlorostoma lischkei (Tapparone-Canefri, 1874). ...
The umbilicus is imperforate. The aperture is subovate. The animal is transparent and colourless. The snail occurs in south- ...
The umbilicus is deep. Apertural lip, callus and apertural fold are very well-developed (callus is very much elevated). ... narrow umbilicus (for the genus Gudeodiscus) and thick peristome. The size of the shell is small to large. The shape of the ...
The umbilicus is lacking. This species occurs in the Atlantic Ocean off Mauritania at depths between 26 mm and 200m. J.J. van ...
The umbilicus goes deep. The aperture is rotund and has a fine lip. The columella is simple. This rare, very fragile shell is ...