1895
Isochilina frequens n. sp. — Steusloff, pp. 784, fig. 58:4
1962
Oepikella? frequens (Steusloff) — Sarv, pp. 105-107, fig. 2:1-10
1989
Diplopsis frequens (Steusloff) — Nõlvak et al., pp. 90, fig. 2
1990
Eoaquapulex frequens (Steusloff) — Meidla et Sarv, pp. 69, fig. 8:5
1996
Eoaquapulex frequens (Steusloff, 1895) — Meidla, pp. 41, fig. 5:12
2011
Eoaquapulex frequens (Steusloff, 1895) — Schallreuter et Hinz-Schallreuter, pp. 210
2011
Aparchites saaremeisus Neckaja, 1952 — Schallreuter & Hinz-Schallreuter, pp. 146