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Smith P 2009 - FAUNA Paraguay

Smith P 2009 - FAUNA Paraguay

Smith P 2009 - FAUNA

Smith P - Thylamys pusillus - FAUNA Paraguay Handbook of the Mammals of Paraguay Number 32 2009 CHACO FAT-TAILED OPOSSUM Thylamys pusillus (Desmarest, 1804) FIGURE 1 - Adult, Bolivia (Louise Emmons). TAXONOMY: Class Mammalia; Subclass Theria; Infraclass Metatheria; Magnorder Ameridelphia; Order Didelphimorphia; Family Didelphidae; Subfamily Thylamyinae; Tribe Thylamyini (Myers et al 2006, Gardner 2007). The genus Thylamys was defined by Gray, 1843 and Palma et al (2002) concluded that the genus was differentiated during the Pleistocene. The species currently recognised as Thylamys correspond roughly to the "elegans-group" as defined in the monograph by Tate (1933). There are nine known species according to the latest revision (Gardner 2007) two of which are present in Paraguay. The genus Thylamys is from the Greek meaning "pouched mouse". The species name pusillus is Latin meaning "very small or tiny" (Braun & Mares 1995). The species is monotypic, though Gardner (2007) notes that the taxon requires revision. No holotype was designated (Brown 2004). The species was described by Desmarest (1804) as Didelphis pusilla, based on de Azara´s (1801: 290) account of two males which he called "Micouré´ sixième, ou Micouré nain" and with type locality "Saint Ignace-Gouazou". Tate (1933) restricted this to San Ignacio Guazú, Departamento Misiones, Paraguay. De Smith P 2009 - CHACO FAT-TAILED OPOSSUM Thylamys pusillus - Mammals of Paraguay Nº 32 Page 1

July 2009 Volume 20 Two - Indigenous Flora and Fauna Association
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