Baseis

Baseis refers to a genus of marine snails belonging to the family Bathymodiolidae. These bivalve mollusks are known for their association with chemosynthetic bacteria, which live symbiotically within their gills. This symbiosis allows the mussels to thrive in environments where sunlight is absent, such as deep-sea hydrothermal vents and cold seeps. The bacteria oxidize reduced chemical compounds, like hydrogen sulfide or methane, providing nutrients to their host.

The genus Baseis is characterized by its elongated, equivalve shell, meaning both shells are roughly equal in size and shape. Their habitat is typically the soft sediment at the base of these chemosynthetic ecosystems, often in large aggregations. The specific species within the Baseis genus can vary depending on the geographical location and the specific type of vent or seep. Research into Baseis and its symbiotic relationship offers valuable insights into the biodiversity and ecological processes of extreme marine environments.