Order EUGLYPHIDA Copeland 1956, emend. Cavalier-Smith 1997
Test of organic material; most taxa with secreted silica scales held together by an organic cement; tubular mitochondrial cristae.
Euglyphidae Wallich 1864, emend. Lara et al., 2007
Test with thin elliptical scales; presence of specialized scales around the pseudostome with typical indentation.
Euglypha.
Euglypha
Euglypha
Euglypha
Euglypha
Euglypha
Assulinidae Lara et al. 2007
Acrostome test composed of elliptic plates disposed in a regular, alternate pattern; test strongly compressed; no specialized type of scales around pseudostome.
Assulina, Placocista, Valkanovia.
Euglypha
Euglypha
Euglypha
Assulina seminulum
Placocista spinosa
Trinematidae Hoogenraad & De Groot 1940, emend Adl et al. 2012

Test with bilateral symmetry; scales oval or round, sometimes of both types; specialized tooth-shaped scales around the aperture; aperture invaginated in some taxa.

Corythion, Playfairina, Puytoracia, Trinema.

Euglypha
Euglypha
Euglypha
trinema
Corythion-dubium
Sphenoderiidae Chatelain et al, 2013

Test with self-secreted circular to elliptical silica scales of different sizes and shapes, but without indentations; pseudostome surrounded with small round or oval scales; usually its ventral side shorter.

Sphenoderia, Trachelocorythion.

Euglypha
Euglypha
Euglypha
Sphenoderia
Trachelocorythion
Cyphoderiidae De Saedeleer 1934
Scales circular, oval or kidney-shaped, juxtaposed or imbricated; test aperture angled, some with collar.
Campascus, Corythionella, Cyphoderia, Messemvriella, Pseudocorythion, Schaudinnula.
Euglypha
Euglypha
Euglypha
Cyphoderia
Campascus minutus

Paulinellidae De Saedeleer 1934, emend. Adl et al. 2012

Pyriform, uncompressed shape; scales, when present, long, with length perpendicular to aperture. At least two genera (Ovulinata, Micropyxidiella ) with totally organic test without silica scales.

Ovulinata, Paulinella, Micropyxidiella.

Euglypha
Euglypha
Euglypha
Euglypha
Paulinella
Incertae sedis
Euglyphida: Ampullataria, Deharvengia, Euglyphidion, Heteroglypha,Matsakision, Pareuglypha, Pileolus, Sphenoderia, Tracheleuglypha, Trachelocorythion.
Euglypha
Euglypha
Euglypha
Pareuglypha reticulata
Tracheleuglypha dentata
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