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Volume 77, Issue 2


New records of the Spectacled Slender Opossum Marmosops ocellatus (Didelphimorphia, Didelphidae) with comments on its geographic distribution limits

Thiago Borges Fernandes Semedo
  • Corresponding author
  • Instituto de Biociências, Departamento de Zoologia, Universidade Federal de Mato Grosso, Av. Fernando Corrêa da Costa, 2367, Cuiabá, Mato Grosso 78060-900, Brazil
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  • Other articles by this author:
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/ Rogério Vieira Rossi
  • Instituto de Biociências, Departamento de Zoologia, Universidade Federal de Mato Grosso, Av. Fernando Corrêa da Costa, 2367, Cuiabá, Mato Grosso 78060-900, Brazil
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/ Tarcísio S. Santos Júnior
  • Resiliência/Consultoria e Assessoria Ambiental. Rua Sete Copas, 143, Imperial II, Cuiabá, Mato Grosso, Brazil
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Published Online: 2012-12-21 | DOI: https://doi.org/10.1515/mammalia-2012-0072


Marmosops ocellatus is a small didelphid marsupial that inhabits central and western South America, including Bolivia and western Brazil. In this report, we provide new distributional records based on 14 specimens deposited in mammal collections. Records from Vale de São Domingos and Cáceres, Mato Grosso state, Brazil, extend approximately 200 km northeastward of the currently known range of the species. Considering our records and those from the literature, we believe that M. ocellatus does not occur in the core region of the Pantanal biome, where flooding areas occur. In fact, among the 120 didelphid specimens from the Pantanal that we examined, none corresponds to M. ocellatus. Additionally, among several published inventories and checklists for the Pantanal, only one cites the presence of this species, with no vouchers mentioned. The known records show that this species may be associated with seasonal forests, such as the Chiquitania dry forest in the western Brazilian border, which shapes the species distribution and leads us to think that M. ocellatus may occur farther to the east, close to the upper Rio Cuiabá, where the Chiquitania dry forest meets the Cerrado.

Keywords: Chiquitania dry forest; marsupial; Pantanal; seasonal forest; Thylamyini


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About the article

Corresponding author: Thiago Borges Fernandes Semedo, Instituto de Biociências, Departamento de Zoologia, Universidade Federal de Mato Grosso, Av. Fernando Corrêa da Costa, 2367, Cuiabá, Mato Grosso 78060-900, Brazil

Received: 2012-06-12

Accepted: 2012-11-07

Published Online: 2012-12-21

Published in Print: 2013-05-01

Citation Information: Mammalia, Volume 77, Issue 2, Pages 223–229, ISSN (Online) 1864-1547, ISSN (Print) 0025-1461, DOI: https://doi.org/10.1515/mammalia-2012-0072.

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