Aspisoma

Aspisoma is a genus of rotifers belonging to the family Aspidiophoridae. These microscopic aquatic animals are characterized by their lorica, a rigid or semi-rigid external covering, which in Aspisoma is often shield-shaped or broadly oval. They are typically found in freshwater habitats, including lakes, ponds, and rivers.

Aspisoma rotifers are suspension feeders, utilizing their corona, a ciliated structure at the anterior end, to generate water currents that draw in food particles. These particles, which can include bacteria, algae, and detritus, are then ingested and processed.

Species within the Aspisoma genus are identified based on morphological characteristics, including the shape and ornamentation of the lorica, as well as the arrangement of internal organs. Identification often requires microscopic examination.

The ecological role of Aspisoma rotifers is significant as they contribute to the cycling of nutrients and serve as a food source for larger organisms in aquatic ecosystems. They are also used as bioindicators to assess water quality, as their presence and abundance can be affected by pollution and other environmental stressors.

The taxonomy of Aspisoma and related rotifer genera has been subject to revisions based on both morphological and molecular data. Ongoing research continues to refine our understanding of their phylogenetic relationships and species diversity.