Galeripora artocrea (Leidy, 1876) González-Miguéns et al., 2021
Basionym: Arcella artocrea Leidy, 1876
Synonyms: Arcella artocrea aplanata Grospietsch, 1954
Arcella artocrea var. catinus Van Oye, 1941
Arcella artocrea var. pseudocatinus Deflandre, 1928

Diagnosis: Height of test one-fourth to one-half the diameter; dome convex; surface mammillated or pitted; border of test pronounced and rising one-fourth to one-half the height of test. Shell with a distinct border. Shell brown, circular with conical aboral region which is often covered by depressions. The basal collar is usually prominent and smooth. The aperture is invaginated, circular, has a small lip and is surrounded by about thirty large and some small pores.

Dimensions: Literature 152—216 µm. My measurements: 160—202 µm.

Ecology: Bogs and Sphagnum ponds.

Remarks: This species was described by Leidy (1876). It resembles slightly Arcella vulgaris, but it differs in having pores around the aperture and a less rounded rim.

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