Meisterfeldia Bobrov, 2016
Description: Test ovoid; bilaterally symmetrical, more or less laterally compressed; colorless, yellow or brown; composed of proteinaceous material without mineral particles; aperture circular, subterminal as seen on ventrally and obliquely cut apertural end, or it is situated on a well developed or poorly expressed neck inclined ventrally; sometimes aperture border shows a slight swelling.
Type species: Meisterfeldia chibisovi Bobrov, 2016
Key to the genera
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Shell length less than 20 μm
2
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Shell without pseudostomal neck and apertural lip
3
3
Shell cross section is circular. There is no invagination on the ventral side. Shell length 13–16 μm
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Shell is more or less flattened. There is more or less prominent invagination on the ventral side. Shell length 6–11 μm
4
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Aperture elliptic
5