1840
Hemicosmites extraneus m. — Eichwald, pp. 182
1899
Hemicosmites extraneus Eichwald (1840, III,182) — Jaekel, pp. 310
1945
Hemicosmites extraneus Eichwald, 1840 — Regnéll, pp. 1000
1979
Hemicosmites extraneus Eichwald, 1840 — Bockelie, pp. 365, fig. text fig. 17