1959
Baltisphaeridium trifurcatum forma longiradiata — Eisenack, pp. 202
1973
Peteinosphaeridium trifurcatum longiradiatum (Eisenack, 1959) — Eisenack et al., pp. 927-928
1991
Peteinosphaeridium trifurcatum longiradiatum (Eisenack, 1959) — Uutela & Tynni, pp. 105, fig. XXIV:254