Subgenus Leptorachis Mitchell

Megachile (Leptorachis) Mitchell 1934: 303, 308. Type species: Megachile petulans Cresson 1878 . Original designation. Michener et al 1994: 149, Michener 2000: 559.

Pseudocentron ( Leptorachis) Mitchell 1980: 56.

Pseudocentron (Grafella) Mitchell 1980: 56. Type species: Pseudocentron (Grafella)

crotalariae Schwimmer in Mitchell 1980. Monotypy and original description. Synonymy of Michener 2000: 559.

Pseudocentron (Leptorachina) Mitchell 1980: 56. Type species: Megachile laeta Smith 1853 . Original designation and monotypy. Synonymy of Michener 2000: 559.