Lasiodora moreni (Holmberg, 1876) nomen dubium Mygale morenii Holmberg, 1876: 6, f. 4. Crypsidromus morenii: Mello-Leitão 1933: 7; Petrunkevitch 1939: 267; Roewer 1942: 227. Crypsidromus moreni: Bonnet 1956: 1261. Type material. Syntypes: seven males and one female, Argentina, not located, herein considered lost. Remark. Holmberg (1876) described a small specimen (14─ 15 mm of length) based on specimens collected in Buenos Aires, Argentina. The description was based on the color pattern and no diagnostic character was mentioned. After contacting the curators of the Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, Dr. Cristina Scioscia and Dr. Martín Ramirez, I was given the information that no Holmberg’s types are known to exist, and maybe they were never deposited in a scientific collection. Therefore, I consider Mygale moreni (Holmberg, 1876) a nomen dubium.