Family: Test rigid, chitinoid, oval to flask-shaped, clear; pseudostome terminal (Illustrated Guide, 1985).
Genus: Test ovate, discoid in cross-section; pseudostome a terminal slit (Illustrated Guide, 1985).

Hyalosphenia sp. 3 clips xxxx xxxx Pref, 1999

Hyalosphenia sp. 3 clips xxxx xxxx Pref, 1999