''Meisterfeldia'' is a genus of arcellinid testate amoebae erected in 2016 that unites several new species as well as old species previously found in the genus ''

Cryptodifflugia ''Cryptodifflugia'' is a genus of arcellinid testate amoebae. It contains all the species previously grouped as the genus ''Difflugiella'', which is now a synonym of ''Cryptodifflugia''. Description ''Cryptodifflugia'' species are characteriz ...

''. Five of the newly described species were first found and isolated from

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soil surrounding a river near

Chokurdakh Chokurdakh (; , ''Çokuurdaax'') is an types of inhabited localities in Russia, urban locality (an urban-type settlement) and the administrative center of Allaikhovsky District of the Sakha Republic, Russia. As of the Russian Census (2010), 2010 C ...

Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...

, while the last one, described in 2021, was recovered from

tree hollows A tree hollow or tree hole is a semi-enclosed cavity which has naturally formed in the trunk or branch of a tree. They are found mainly in old trees, whether living or not. Hollows form in many species of trees. They are a prominent feature of n ...

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Description

Members of this genus are characterized by their ovoid, bilaterally symmetrical, laterally compressed

tests Test(s), testing, or TEST may refer to: * Test (assessment), an educational assessment intended to measure the respondents' knowledge or other abilities Arts and entertainment * ''Test'' (2013 film), an American film * ''Test'' (2014 film) ...

. These tests are either colorless, yellow or brown, composed of proteinaceous material that lacks mineral particles. The test's aperture is circular, localized either in a ventrally subterminal position or a neck inclined vertically. Sometimes, the aperture's border shows a slight swelling.

Taxonomy

The genus ''Meisterfeldia'' is named after the German protozoologist Ralf Meisterfeld. It encompasses 6 species described so far, distinguished from each other through the shape and size parameters of their

: * '' Meisterfeldia chibisovi'' Bobrov 2016 (type species) *'' Meisterfeldia wegeneri'' Bobrov 2016 *'' Meisterfeldia polygonia'' Bobrov 2016 *'' Meisterfeldia vanhoornei'' (Beyens et Chardez 1986) Bobrov 2016 asionym: ''Difflugiella vanhoornei'' Beyens et Chardez 1986*'' Meisterfeldia turfacea'' (Zacharias 1903) Bobrov 2016 asionym: ''Cryptodifflugia turfacea'' Zacharias 1903*'' Meisterfeldia bitsevi'' Bobrov & Mazei 2021

References

Tubulinea Amoebozoa genera {{amoebozoa-stub