Theobroma cacao coming from Chuao were awarded an appellation of origin under the title "Cacao de Chuao" (from Spanish-"cacao of Chuao"). The cacao bean in 80% of chocolate is made using beans of the Forastero group, the main and most ubiquitous variety being the Amenolado variety, while the arriba variety (such as the Nacional variety) are less commonly found in Forastero produce. Forastero trees are significantly hardier and more disease-resistant than Criollo trees, resulting in cheaper cacao beans. Major cocoa bean processors include Hershey's, Nestlé and Mars, all of which purchase cocoa beans via various sources. Chocolate can be made from "T.
Madeira-Tapajós moist forests excelsa" and "Duckeodendron cestroides". At one time the endemic tree "Polygonanthus amazonicus" grew near Maués, the western limit for the emergent "Dinizia excelsa" and the eastern limit for the "Theobroma cacao". The Tapajós basin is the eastern limit of "Theobroma microcarpum". The "Physocalymma scaberrima" has red hardwood used by furniture makers. The montane forests of the upper Marmelos and middle Tapajós hold "Hevea camporum", "Euterpe longibracteata", "Huberodendron ingens" and "Brachynema ramiflorum". Further south in Mato Grosso there are forests in the transition between the Amazon and cerrado biomes. 183 species of mammals have been reported, including 90 bat species and