Cressoniella (Trichurochile) Mitchell 1980: 63. Type species: Megachile thygaterella Schrottky. Original designation and monotypy. Megachile (Trichurochile) Michener 2000: 566. The three members of this subgenus range from northern Argentina to central Brazil.
* 1. Megachile (Trichurochile) gracilis Schrottky Megachile gracilis Schrottky 1902: 435-436. Female. Type locality: Jundiay [=Jundiaí], São Paulo, 28 January 1900 (Beron). Type repository: MZSP. Examined. [Type missing fore tibiae and tarsi, right mid tibia and tarsi and left hind tarsi.] DISTRIBUTION. BRAZIL: MG; SP.
Cressoniella (Trichurochile) Mitchell 1980: 63. Type species: Megachile thygaterella Schrottky. Original designation and monotypy. Megachile (Trichurochile) Michener 2000: 566. The three members of this subgenus range from northern Argentina to central Brazil.
* 1. Megachile (Trichurochile) gracilis Schrottky Megachile gracilis Schrottky 1902: 435-436. Female. Type locality: Jundiay [=Jundiaí], São Paulo, 28 January 1900 (Beron). Type repository: MZSP. Examined. [Type missing fore tibiae and tarsi, right mid tibia and tarsi and left hind tarsi.] Megachile (Trichurochile) gracilis : Raw 2002 # 7: 35. ADDITIONAL REFERENCES. Ihering 1904: 470 (N); Schrottky 1913a: 138 (K); Silveira et al 2002: 214 (D). DISTRIBUTION. BRAZIL: MG; SP. NESTING. Nest lined with cut leaves. The cell is 12 mm long and 5 mm wide.
* 2. Megachile (Trichurochile) lachnopyga Moure Megachile lachnopyga Moure 1941: 94-96. Male. Type locality: Curitiba (900 m), Paraná [Brazil]. Type repository: Claretiano collection. Megachile lachnopyga var. langei : Moure 1941: 96. Male. Type locality: Rio Baraguí, Curitiba, Paraná (Rodolfo Lange). Type repository: Claretiano collection. Synonymy of Moure 1943: 186. ADDITIONAL REFERENCE. Silveira et al 2002: 214 (D). DISTRIBUTION. BRAZIL: PR- Curitiba; SP.
* 3. Megachile (Trichurochile) thygaterella Schrottky Megachile thygaterella Schrottky 1913a: 220-221. Male. Type locality: Puerto Bertoni, Paraguay. Type repository: MZSP. Megachile anthidioides Schrottky 1919 (in part). Synonymy of Moure 1943: 186. Cressoniella (Trichurochile) thygaterella : Mitchell 1980: 63. Megachile (Trichurochile) thygaterella : Silveira et al 2002: 214 (D). DISTRIBUTION. BRAZIL: DF- Brasilia (Raw); SP. PARAGUAY: Puerto Bertoni.