A survey of the gastropods of "Parque Estatal de la Sierra", a reserve located within Teapa and Tacotalpa municipalities, Tabasco, Mexico, was conducted during 1995 and 1996. In total, 42 species were recorded. Of these, 28.6% belonged to Prosobranchia (41.7% Mesogastropoda, 58.3% Archaeogastropoda) and 71.4% to Pulmonata (56% Holopoda, 41% Holopodopes, 3% Aulocopoda, all suborders of Sigmurethra). Thirty nine species were terrestrial and 3 were aquatic (freshwater).
