Sciurus alleni Nelson, 1898
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| The recent mammals of Tamaulipas, Mexico T Alvarez (1963) University of Kansas Publications, Museum of Natural History 14: 363-473 | |
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| Historical Synthesis Of Mexican Mammalian Taxonomy Ramirez-Pulido J and M C Britton (1981) Proceedings of The Biological Society of Washington 94: 1-17 | |
| Revision Of The Extant Taxa Of The Genus Notiosorex (Mammalia : Insectivora : Soricidae) L N Carraway and R M Timm (2000) Proceedings of The Biological Society of Washington 113: 302-318 |