D. brevicaulis, after Thomas and Mabille, 1956
Difflugia brevicaulis Thomas & Mabille, 1956 *)
Basionym: Difflugia acuminata var. brevicaulis Thomas & Mabille, 1956
Diagnosis: Shell cylindrical, broadening towards the semi-spherical fundus which has an extremely short posterior horn or spine. Shell wall embedded with mineral particles and/or diatom frustules.
Dimensions: Thomas and Mabille (1956): Shell length (without horn) 189-239 µm; total length (with horn) 200-253 µm; width 86-116 µm.
Habitat: Freshwater. Europe.
*) Difflugia acuminata var. brevicaulis Thomas & Mabille, 1956 changed to Difflugia brevicaulis Thomas & Mabille, 1956.
Note: A formal change is not required in this case according to the International Code of Zoological Nomenclature: (1) According to article 45.6.3, as the name was published before 1961 using the abbreviation var., it is deemed to be subspecific rather than infra-subspecific and therefore falls under rulings for species-group nominal taxa (Chapter 10). (2) According to article 46.1, names established at either species ranks (species or subspecies) are simultaneously established at the other rank, with same author and same type. Authority thus is unchanged.