gramatilis

Gramatilis is a genus of philometrid flatworms in the Phyllodistomidae family. These parasites infest the abdominal cavity of the sea scallop Pecten jacobaeus, specifically within the oesophagus and rectum.

Gramatilis is unique among parasitic flatworms due to its endosymbiotic lifestyle with bacteria. These bacteria produce nitrogenous compounds, which satisfy the nutritional needs of the flatworm. This symbiotic relationship is essential for the survival of both the flatworm and the bacteria.

Research suggests that Gramatilis flatworms may aid in the decomposition process within their host scallop. By breaking down organic matter and recycling nutrients, they contribute to the maintenance of their host's ecosystem.

Studies on the morphology and development of Gramatilis have been conducted primarily through microscopic and scanning electron microscope examinations. These studies have provided valuable information on the structure of the flatworm and its significance in marine ecosystems.

In terms of preservation, voucher specimens of Gramatilis have been lodged in recognized museums and collections. This ensures the continued accessibility of specimens and enables further research opportunities.

Established phylogenetic affiliations position Gramatilis along with other Phyllodistomidae genera, ultimately identifying them as part of this broader parasitic worm family.