Suborder EUGLYPHINA Kosakyan et al., 2016

 
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
 
 
 
 
 
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.
 
 
 
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.

 
 
 
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.

 
 
 
Sphenoderia
Trachelocorythion