Definition
Odostomia striata is a species of minute marine gastropod mollusk belonging to the family Pyramidellidae, the pyrams and their allies. It is an ectoparasitic sea snail that inhabits marine benthic environments.
Overview
The species is listed in the World Register of Marine Species (WoRMS) as a valid taxon within the genus Odostomia. Members of this genus are widely distributed in temperate and tropical seas, and O. striata is reported from European waters, particularly the North Atlantic coasts of the United Kingdom and adjacent regions. Like other pyramidellids, it is a micropredator that feeds by piercing the tissues of host invertebrates, commonly annelids or other mollusks.
Etymology / Origin
The specific epithet striata derives from the Latin word striatus, meaning “striped” or “grooved.” The name refers to the fine, parallel striations that characterize the shell surface of this species.
Characteristics
- Shell morphology: The shell is high‑spired, slender, and generally white to translucent. It attains a length of approximately 1.5–3 mm. The teleoconch typically comprises 5–6 whorls with a smooth, glossy appearance interrupted by fine axial striations that give the species its name.
- Protoconch: As with other Odostomia species, the protoconch is heterostrophic, indicating a planktotrophic larval stage.
- Habitat: O. striata inhabits sublittoral zones, often found on sandy or muddy substrates at depths ranging from the intertidal fringe to about 50 m.
- Feeding: Pyramidellid snails possess a specialized proboscis and lack a radula; they feed by inserting a stylet into the tissues of their hosts, extracting bodily fluids.
- Reproduction: Like most pyramidellids, they are hermaphroditic, producing egg capsules that develop into free‑swimming larvae.
Related Topics
- Genus Odostomia – a large genus of small, ectoparasitic marine snails.
- Family Pyramidellidae – a diverse family of micromollusks characterized by their parasitic lifestyle and heterostrophic protoconchs.
- Marine ectoparasitism – ecological interactions wherein small gastropods feed on the bodily fluids of larger invertebrate hosts.
- World Register of Marine Species (WoRMS) – an authoritative database that provides taxonomic details and distribution information for marine species.
Note: Specific measurements, distribution records, and ecological details for Odostomia striata are drawn from standard characteristics of the genus and confirmed listings in reputable taxonomic databases. Where precise data are lacking, the description reflects typical attributes of closely related Odostomia species.