Species of Hagensia
Hagensia is characterized by several morphological autapomorphies that lead us to confidently group H. peringueyi with the type species, H. havilandi . Taylor (2008) informally divides the genus into three species, but we are following the traditional division of two species until a formal study of species-level taxonomy is published. See Arnold (1951) for a key to species.
H. havilandi (Forel, 1901): South Africa (comb. rev.)
H. havilandi fochi (Forel, 1918): South Africa (comb. nov.)
H. havilandi godfreyi Arnold, 1926: South Africa (comb. rev.)
H. havilandi marleyi Arnold, 1926: South Africa (comb. rev.)
H. peringueyi (Emery, 1899): South Africa (comb. rev.)
H. peringueyi saldanhae Arnold, 1951: South Africa (comb. rev.)