Galeripora catinus (Penard, 1890) González-Miguéns et al., 2021
Basionym: Arcella catinus Penard, 1890

Diagnosis: Shell in dorsal view oval, circular or quadrate; dorsal region smooth or divided into segments by folds of the shell surface, sometimes with pronounced ribs or folds. Aperture invaginated, circular or elliptical, with a small lip and surrounded by many large and small pores.

Dimensions: Literature: Shell diameter 73—140 µm; Heigth about 45 µm; 15—18 pores. My measurements: 128—133 µm.

Habitat: Freshwater; among vegetation and in wet Sphagnum.

Remarks: The similarity between G. catinus and G. arenaria has led to some confusion in earlier descriptions. The two species may be distinguished by the size of the aperture and the number of pores surrounding it.

References: González-Miguéns, R., Soler-Zamora, C., Villar-Depablo, M., Todorov, M., Lara, E., 2021. Multiple convergences in the evolutionary history of the testate amoeba family Arcellidae (Amoebozoa: Arcellinida: Sphaerothecina): when the ecology rules the morphology. Zoological Journal of the Linnean Society zlab074. https://doi.org/10.1093/zoolinnean/zlab074