On the relationships of 'Marmosa' formosa Shamel, 1930 (Marsupialia: Didelphidae), a phylogenetic puzzle from the Chaco of northern Argentina
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Abstract
The holotype and only known specimen of Marmosa formosa Shamel, a nominal species currently synonymized with Gracilinanus agilis Burmeister, is strikingly unlike any other known didelphid marsupial. Phylogenetic analyses based on nonmolecular characters and IRBP sequences suggest that formosa is either the sister-taxon of Thylamys (including Lestodelphys) or Monodelphis. Because neither alternative is strongly supported by the data at hand, and because including formosa in Thylamys or in Monodelphis would compromise the diagnosability of those taxa, a new genus?Chacodelphys?is proposed to contain it. Currently known only from northern Argentina, Chacodelphys formosa may be widely distributed in the Chaco and other adjacent Neotropical biomes.
| Publication type | Report |
|---|---|
| Publication Subtype | Organization Series |
| Title | On the relationships of 'Marmosa' formosa Shamel, 1930 (Marsupialia: Didelphidae), a phylogenetic puzzle from the Chaco of northern Argentina |
| Series title | American Museum Novitates |
| DOI | 10.1206/0003-0082(2004)442<0001:OTROMF>2.0.CO;2 |
| Volume | 3442 |
| Year Published | 2004 |
| Language | English |
| Publisher | American Museum of Natural History |
| Contributing office(s) | Patuxent Wildlife Research Center |
| Description | 18 p. |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |