Description published
Friese, Entomologische Nachrichten (Berlin), 25: 26.
Location of type
Type material: Syntypes mm, “Biskra” [Algeria]. Type species of Pentadentosmia Warncke.-Combination Osmia (Pentadentosmia) quinquespinosa Friese in Warncke (1991a: 18).-Synonymy with Osmia laevifrons Morawitz in Ducke (1900: 193), rejected by Warncke (1991a: 18).