brown point snail vs

Acicula fusca compared with Colacium sideropus

Key Differences

• brown point snail is Extinct while is Not Evaluated.

Taxonomic Classification

Rank	brown point snail
Kingdom	Animalia (Animals)	Protozoa (protozoa)
Phylum	Mollusca (Mollusks)	Euglenozoa (Euglenozoa)
Class	Gastropoda (Gastropoda)	Euglenoidea (Euglenoidea)
Order	Architaenioglossa (Architaenioglossa)	Euglenida (Euglenida)
Family	Aciculidae	Euglenaceae
Genus	Acicula	Colacium
Species	Acicula fusca	Colacium sideropus

Conservation Status

brown point snail

EX — Extinct

NE — Not Evaluated

Physical Characteristics

Attribute	brown point snail
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

brown point snail

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Distributed across Belgium and Norway.

Habitat

Native to Europe and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Brazil and Sweden.

brown point snail

The Brown Point Snail (Acicula fusca) is a species in the genus Acicula. It is currently classified as Extinct on the IUCN Red List. Typically found in terrestrial and aquatic habitats including forests and freshwater.

Colacium sideropus is a microscopic euglenoid protist belonging to the family Euglenaceae, characterized by its sessile, colonial lifestyle attaching to aquatic invertebrates and zooplankton. Members of the genus Colacium are distinguished from free-swimming euglenoids by their stalked or clustered growth form, anchoring to the bodies of crustaceans such as copepods and cladocerans in freshwater environments. Like other photosynthetic euglenoids, Colacium possesses chloroplasts derived from secondary endosymbiosis with a green alga, allowing it to perform photosynthesis under favorable light conditions. The relationship with host invertebrates is generally considered epibiotic rather than parasitic, with the protist colonizing the external surfaces of its host without causing significant harm. Colacium sideropus occurs in freshwater lakes, ponds, and slow-moving streams where its zooplankton hosts are abundant. Its ecological role includes contributing to microbial food webs and nutrient cycling within freshwater ecosystems. As with many microscopic protists, its true distribution and abundance are difficult to assess from macroscopic surveys, and it is likely globally distributed wherever suitable hosts exist in freshwater habitats.