Samples of marine Lower and Middle Tithonian gastropods from Picún Leufú, Cañadón de los Alazanes, Cerro La Parva (Neuquén) and Casa Pincheira (Mendoza) have provided three undescribed species. These are: Exelissa? arcuatoconcava nov. sp. (Mendozanus Biozone), Sinuarbullina melehuensis nov. sp. (Zitteli Biozone) and Dicroloma? sp. (Mendozanus Biozone).
Muestras de gastrópodos marinos del Tithoniano Inferior y Medio de Picún Leufú, Cañadón de los Alazanes, Cerro La Parva (Neuquén) y Casa Pincheira (Mendoza) contienen las siguientes especies: Exelissa? arcuatoconcava nov. sp. (Mendozanus Biozone), Sinuarbullina melehuensis nov. sp. (Zitteli Biozone) and Dicroloma? sp. (Mendozanus Biozone).
