An interesting group of testate amoebae is the genus Difflugia. There have been described hundreds of species, but the question is: how many of them are true species? Most descriptions are inaccurate of just based on one single test. Probably this group consists of several genera. Only DNA sequencing can help here. One of my projects is to make a visual map of all known species. It’s one of the most difficult taxa to identify. 

Recent posts

Difflugia key lobed

Tests with lobed or irregular aperture The aperture of these test is not circular, but lobed or irregular. This group has no taxonomic significance. D. baculosa

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Difflugia key oblong

Tests that are oblong or clavate in shape Tests are elongate ovate, or club-shaped, or clavate, with the widest part of the shell in the

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Difflugia acuminate tests

Acuminate tests Tests with one or more spines, a tapering fundus or just a pointed fundus.This group has no taxonomical significance. D. acuminata D. congolensis

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