1892
Beyrichia (Tetradella) harpa n. sp. — Krause, pp. 394, fig. 22:15
1959
Tallinnopsis ovalis (Oraspõld, in coll.) — Sarv, pp. 70-71, fig. 13:16-21
1985
Tetrada harpa (Krause) — Schallreuter, pp. 108-109, fig. 4:1-3
1992
Tetrada (Tetrada) ovalis (Sarv) — Sidaravičiene, pp. 113-114, fig. 29:11
1996
Tetrada (Tetrada) harpa (Krause, 1892) — Meidla, pp. 46, fig. 7:7