Marsupials and rodents are two of the most specious mammalian group, displaying a variety of diet and feeding habits. However, the knowledge about diet for several small mammal species is scant in the scientific literature, and most species are classified as insectivore–omnivore (marsupials), or frugivore–graminivore (rodents). In this study, we described diet composition based on digestive tract contents of 12 species of small mammals (7-rodents and 5-marsupials), in semi-deciduous forest fragments of Central Brazil. We analysed 47 digestive tract contents belong to Calomys tener (10), Oecomys bicolor (10), Gracilinanus agilis (6), Marmosa murina (5), Rhipidomys macrurus (5), Calomys expulsus (2), Cryptonanus chacoensis (2), Monodelphis kunsi (2), Oecomys catherinae (2), Caluromys philander (1), Oligoryzomys mattogrossae (1) and Necromys lasiurus (1). We found parts of arthropods and fruits in the digestive tract of all species, with the exception of N. lasiurus, which contained only arthropods. The most representative arthropod taxa were Hymenoptera (present in 11 species), Coleoptera (9 spp.), Arachnida (7 spp.) and Isoptera (6 spp.). The seeds of Piperaceae (present in 3 small mammal species), Myrtaceae (2 spp.) and Poaceae (1 sp.) were also identified. This study reports the first records of diet composition for the marsupials C. chacoensis and M. murina, and rodents C. expulsus, C. tener, O. bicolor, O. catherinae and R. macrurus. Our findings contribute to understanding the diet composition and natural history of the Brazilian Savanna small mammals.

中文翻译：

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巴西中部半落叶林碎片中小型哺乳动物的饮食

有袋动物和啮齿动物是最似是而非的哺乳动物群中的两个，表现出多种饮食和摄食习惯。然而，科学文献中对几种小型哺乳动物的饮食知识知之甚少，大多数物种被归类为食虫-杂食动物（有袋动物）或食果-草食动物（啮齿动物）。在这项研究中，我们描述了基于巴西中部半落叶森林碎片中 12 种小型哺乳动物（7 种啮齿动物和 5 种有袋动物）消化道内容物的饮食组成。我们分析了属于Calomys tener (10)、Oecomys bicolor (10)、Gracilinanus agilis (6)、Marmosa murina (5)、Rhipidomys macrurus (5)、Calomys expulsus的 47 种消化道内容物(2), Cryptonanus chacoensis (2), Monodelphis kunsi (2), Oecomys catherinae (2), Caluromys philander (1), Oligoryzomys mattogrossae (1) 和Necromys lasiurus (1)。我们在所有物种的消化道中都发现了部分节肢动物和水果，除了N. lasiurus，它只包含节肢动物。最具代表性的节肢动物类群是膜翅目（11 种）、鞘翅目（9 种）、蛛形纲（7 种）和等翅目（6 种）。还鉴定了胡椒科（存在于 3 种小型哺乳动物物种中）、桃金娘科（2 种）和禾本科（1 种）的种子。这项研究报告了有袋动物饮食组成的第一批记录C. chacoensis和M. murina，以及啮齿动物C. expulsus、C. tener、O. bicolor、O. catherinae和R. macrurus。我们的研究结果有助于了解巴西稀树草原小型哺乳动物的饮食组成和自然历史。