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

Diagnosis: Shell discoid, perfectly round, very strongly compressed, with very clear alveolar patterns, with the ventral side pushed inwards, with a very large aperture (1/3 of the diameter of the shell), surrounded by very small and extremely numerous pores. Nuclei 8 to 10, rarely more, with central nucleolus.

Dimensions: Shell diameter 80-120 µm on average, often more (Penard, 1902)

Habitat: Freshwater.

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