1886
Homotrypella instabilis — Ulrich, pp. 83
1893
Homotrypella instabilis — Ulrich, pp. 229, fig. 18.9-20
1911
Homotrypella instabilis Ulrich — Bassler, pp. 189, fig. text fig. 101, 102
1953
Homotrypella instabilis Ulr. — Modzalevskaya, pp. 101
1977
Homotrypella instabilis Ulrich, 1886 — Fritz
1978
Homotrypa instabilis Ulrich, 1886 — Astrova, pp. 95
2009
Homotrypella instabilis — Pachut & Fisherkeller, pp. 404