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GENUS Tympanoctomys

Author:Yepes, 1940.
Actual Date:1941
Citation:Rev. Inst. Bact., 9: 569.
Type Species:Octomys barrerae Lawrence, 1941.
Comments:Considered a synonym of Octomys (see Reig, 1986:408; Corbet and Hill, 1991:204), but Cabrera (1961:516) and Redford and Eisenberg (1992) considered it a separate genus based on very enlarged tympanic bullae. Octomys identified as sister taxon by molecular data (Gallardo and Kirsch, 2001; Honeycutt et al., 2003), however, Mares et al. (2000) suggested Pipanacoctomys and Salinoctomys are the sister taxa. Although demonstrated to be a tetraploid, its chromosomal evolution is more complicated than a simple duplication of the chromosomes of Octomys (Gallardo et al., 1999).
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SPECIES barrerae

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