Rhomboentomozoidae Gründel, 1962

Legiot, Nicolas, 2019, Silurian myodocope ostracods from Poland, Acta Palaeontologica Polonica 64 (2), pp. 379-397 : 388

Family Rhomboentomozoidae Gründel, 1962

Type genus: Rhomboentomozoe Přibyl, 1951 .

Emended diagnosis.—Left and right valves of apparently equal size. Lateral outline “triangular” to subquadrate, sometimes broadly egg-shaped. Straight dorsal margin usually well developed, sometimes corresponding to greatest carapace length; cardinal angles distinct or rounded. Sulcus always present, usually strongly developed, often extending across more than half of valve surface. Muscle attachment area absent or represented by a simple elliptical area at the ventral end of the sulcus. Spines may be developed near margin. Valve ornament absent or consisting of longitudinal ribs arranged parallel to dorsal margin; some outer ribs may be parallel to ends of valve (modified after Gooday 1983).

Remarks.—In addition to the type genus, conventionally the family includes Franklinella Stewart and Hendrix, 1945 , Pseudoentomozoe Přibyl, 1951 , Paraungerella Wang, 1986 , Yulinentomozoe Wang, 1989 , and possibly Vltavina Bouček, 1936 . It is distinguished from the Entomozoidae by the generally triangular to subquadrate lateral outline and long, straight dorsal margin of the valves.