Visma (gastropod)

Visma is a genus of sea snails, marine gastropod mollusks in the family Neritidae, the nerites.

Description

Shells in the genus Visma are typically small to medium in size, characterized by a rounded or ovate shape. The shell surface is generally smooth, although some species may exhibit fine growth lines or subtle ornamentation. Coloration varies, often displaying patterns of brown, gray, or cream, sometimes with darker markings. The aperture is D-shaped, and the inner lip is typically smooth and porcelain-like.

Distribution

Species within the genus Visma are found in tropical and subtropical marine environments, primarily in the Indo-Pacific region.

Ecology

Visma snails are typically found grazing on algae on rocky shores and coral reefs. They are herbivorous and play a role in controlling algal growth in their habitats.

Taxonomy

The genus Visma was established by [Insert original author and year of publication here if known, otherwise omit]. The taxonomic classification of species within Visma has been subject to revision, and further research may be needed to fully resolve the relationships between species.

Species

[List known species here if information is readily available and accurate. Example: Visma nodosa, Visma picta. If species list is highly uncertain or unavailable, omit this section.]

References

[List references here if available, e.g., relevant taxonomic publications or databases. If no readily available references, omit this section.]