Euglypha elegans  Playfair, 1917
Basionym: Euglypha australica var. elegans Playfair, 1917

Diagnosis: Shell elliptical or long-ovate, narrowed behind, not hemispherical; sides slightly arched, sometimes a little flattened towards the aperture; aperture narrow, surrounded by two rows of ovate plates (5—7 visible), pointed in front, with serrated edges. Body-plates very characteristic, being recessed both front and back, with .a centra), projecting spike in each recess. Shell may be found smooth or armed behind with a circle of spines, in number 1 to 5, generally 2 or 3, The shell is elliptical rather than ovate or oval, and the breadth about half the length, the aperture again being about half the breadth.

Dimensions: Shell length 67—137 µm, width 32—72 µm, aperture 19—36 µm, spines 10—45 µm long.

Ecology and distribution: Australia.

Remarks: Euglypha australica var. elegans Playfair, 1917 is changed to Euglypha elegans Playfair, 1917. No new name needs to be established in this case under the International Code of Zoological Nomenclature. Because the name was published before 1961 using the abbreviation var., it is deemed subspecific under Article 45.6.4, unless explicitly proposed as infrasubspecific. As a species-group name, it is simultaneously established at both species and subspecies rank under the Principle of Coordination (Art. 46.1), with the same author, date, and name-bearing type. Accordingly, when treated at species rank, the correct name is Euglypha elegans Playfair, 1917.