Thalotia
A genus of marine top snails with thick, conical shells.
Thalotia is a genus of marine gastropod mollusks, specifically sea snails, belonging to the Trochidae family, commonly called top snails. Its shell is thick and solid, with no opening at the apex (imperforate), and has a tall, conical shape. The shell’s surface is either covered in small granules or marked with spiral ribs. The outer edge of the shell is rounded or somewhat angled. The aperture, or shell opening, is small and oval-shaped. The outer lip is thick and has a scalloped or crenulated inner edge. The columella, the central pillar of the shell, has a tooth at its base and appears slightly cut off (subtruncated).
Species currently recognized within Thalotia include *Thalotia beluchistana*, *Thalotia conica*, *Thalotia khlimax*, *Thalotia polysarchosa*, and *Thalotia tiaraeides*. Many other species once placed in this genus have since been reassigned to other genera as synonyms.
Quick Facts
- Taxon
- Thalotia
- Type Species
- Trochus pictus
- Type Species Authority
- Wood, 1828
Facts from the source article.
Lore & Background
The shell of Thalotia is thick and solid, imperforate, and elevated-conical in shape, with a surface that is either granulated or spirally ribbed. Its periphery is rounded or obtusely angular. The aperture is small and ovate, with a thick outer lip that is crenulated within. The columella is toothed at the base and subtruncated.
Species within the genus include Thalotia beluchistana, Thalotia conica, Thalotia khlimax, Thalotia polysarchosa, and Thalotia tiaraeides. Many other species originally placed in Thalotia have since been moved to synonymy with other genera, such as Tosatrochus, Odontotrochus, Calthalotia, Cantharidus, Prothalotia, and others.
Reader's Guide
The genus Thalotia is significant within the family Trochidae for its distinctive shell morphology, characterized by a thick, imperforate, elevated-conical form with granulated or spirally ribbed surfaces. The small ovate aperture, thick crenulated outer lip, and toothed columella are key diagnostic features. The article lists several accepted species, including Thalotia conica and Thalotia khlimax, while also documenting a large number of species that have been reassigned to other genera, reflecting ongoing taxonomic refinement. This synonymy highlights the historical complexity of classifying trochid snails and the importance of careful morphological and nomenclatural study. The genus's legacy lies in its contribution to understanding the diversity and evolutionary relationships within Trochidae, as evidenced by the many species originally described under Thalotia that now reside in other genera.
Did You Know?
- Thalotia is a genus of sea snails in the family Trochidae.
- The shell of Thalotia is imperforate and elevated-conical.
- The columella of Thalotia is toothed at the base and subtruncated.
- Many species originally placed in Thalotia have been moved to other genera such as Tosatrochus and Cantharidus.
More in Marine Snails 1-24
Spotted an error? Know more?
Reader corrections go straight into our review queue. Suggest an edit · How this site is sourced