Work found, with species-group names introduced therein:
Matthews-Cascon, H., H. R. Matthews and C. de Almeida Rocha. 1991. Nova espécie de Latirus Montfort, 1810 (Mollusca: Gastropoda). Boletim do Museu Nacional, Nova Série, Zoology (Rio de Janeiro) 349 1-6. [Stated date: 30 Dec 1991.] Latirus lacteum [sic], see Polygona lactea (Matthews-Cascon, Matthews & Rocha, 1991)