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A new genus and species of rodent from the Brazilian Atlantic Forest (Rodentia: Cricetidae: Sigmodontinae: Oryzomyini), with comments on oryzomyine biogeography

机译:来自巴西大西洋森林(Rodentia:Cricetidae:sigmodontinae:Oryzomyini)的啮齿动物的新属和种,评论了关于oryzomyine生物地理学

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摘要

We describe in this paper a new genus and species of cricetid rodent from the Atlantic Forest of Brazil, one of the most endangered eco-regions of the world. The new form displays some but not all synapomorphies of the tribe Oryzomyini, but a suite of unique characteristics is also observed. This new forest rat possesses anatomical characteristics of arboreal taxa, such as very developed plantar pads, but was collected almost exclusively in pitfall traps. Phylogenetic analyses of morphological (integument, soft tissue, cranial, and dental characters) and molecular [nuclear - Interphotoreceptor retinoid binding protein (Irbp) - and mitochondrial - cytochrome b - genes] datasets using maximum likelihood and cladistic parsimony approaches corroborate the inclusion of the new taxon within oryzomyines. The analyses also place the new form as sister species to Eremoryzomys polius, an Andean rat endemic to the Maranon valley. This biogeographical pattern is unusual amongst small terrestrial vertebrates, as a review of the literature points to few other similar examples of Andean-Atlantic Forest pairings, in hylid frogs, Pionus parrots, and other sigmodontine rodents. (C) 2011 The Linnean Society of London, Zoological Journal of the Linnean Society, 2011, 161, 357-390. doi:10.1111/j.1096-3642.2010.00643.x
机译:我们在本文中描述了一种来自巴西大西洋森林的凶猛啮齿动物的新属和新物种,巴西是世界上最濒危的生态区域之一。新形式显示了Oryzomyini部落的一些但不是全部的同形,但是也观察到了一整套独特的特征。这只新的森林老鼠具有树状类群的解剖特征,例如非常发达的足底垫,但几乎只收集在陷阱陷阱中。系统发育分析的形态学(外皮,软组织,颅骨和牙齿特征)和分子[核-感光体间维甲酸结合蛋白(Irbp)-和线粒体-细胞色素b-基因]数据集使用最大似然和分类简约方法进行证实。 Oryzomyines中的新分类单元。分析还将该新形式作为Eremoryzomys polius的姊妹物种,该物种是Maranon谷特有的安第斯老鼠。这种生物地理模式在小型陆生脊椎动物中是不寻常的,因为文献回顾指出,在安第斯-大西洋森林配对中,在小青蛙,美洲豹鹦鹉和其他Sigmodontine啮齿动物中,很少有其他类似的例子。 (C)2011年伦敦林奈学会,《林奈学会动物学杂志》,2011,161,357-390。 doi:10.1111 / j.1096-3642.2010.00643.x

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