Littoraria irrorata

Marsh Periwinkle

A small climbing snail found on marsh grasses, feeding on algae and fungi while helping shape coastal food webs.

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Identity & Origin +

Common Name: Marsh Periwinkle
Scientific Name: Littoraria irrorata
Realm: Terrestrial
Biome: Mangrove Forest, Marine Shore
Date First Introduced: June 13, 2025

Population Dynamics +

Current Estimated Population: 5
Population Status: Vulnerable
Carrying Capacity Status: Below Capacity
Date Last Observed: November 02, 2025

Section Notes

Doesn't seem to be thriving possibly due to the full salinity in the biome. These are brackish species that will need a brackish biome

[10/2/2025] The conservation status has been moved to endangered since learning the crucial role fungi plays in their development. Without this fungi, it can be expected that this species will be driven to extinction.

Trophic Ecology +

Trophic Level: Primary Consumer
Feeding Niche / Method: Grazing
Dietary Inputs: Grazer of algae and fugus on marsh plants
Known Predators: None Known

Section Notes

This species requires a special fungi which is their preferred diet and grows on a certain grass (S. alterniflorus). They cultivate this fungi and I don't believe this dynamic will be easily reproducible in miniBIOTA.

Environmental Tolerances +

Life Cycle & Reproduction +

Ecological Role & Symbiosis +

Marine/Saltwater

A sandy, limestone shoreline where beach grasses, crabs, snails, and detritivores move nutrients across the waterline.

Brackish / Mangrove

A salt-influenced forest zone where mangrove roots, leaf litter, crabs, and terrestrial detritivores build the boundary between freshwater and marine sides.

Marsh Periwinkle

Section Notes

Section Notes

Classification Pending

Section Notes

Biomes This Species Lives In

Marine Shore

Mangrove Forest

No Records Yet

Marsh Periwinkle

Biomes This Species Lives In

No Records Yet

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