A small mammalian fauna is recorded from Extinction Cave (also called Sibun Cave), east of Belmopan, on the Sibun River, Belize, Central America. The animals recognized are armadillo (†Dasypus bellus), American lion (†Panthera atrox), jaguar (Panthera onca), puma or mountain lion (Puma concolor), Florida spectacled bear (†Tremarctos floridanus), javelina or collared peccary (Pecari tajacu), llama (Camelidae indet., †?Palaeolama mirifica), red brocket deer (Mazama americana), bison (Bison sp.) and Mexican half-ass (†Equus conversidens); sabre-toothed cat (†Smilodon fatalis) may also be represented. “†” indicates an extinct taxon. Bear and bison are absent from the region today. The bison record is one of the more southerly known. The bear record is almost the most westerly known and a first for Central America.

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