Bezerra Alexandra M R, Caramaschi Fabiana P, Bonvicino Cibele R, Castiglia Riccardo
Mastozoologia/COZOO, Museu Paraense Emilio Goeldi, Campus de Pesquisa, Av. Perimetral 1901, CEP 66077-830, Belém, PA, Brazil..
Zootaxa. 2018 Oct 29;4508(1):28-46. doi: 10.11646/zootaxa.4508.1.2.
New records for Monodelphis glirina, a short-tailed opossum distributed throughout the Amazon region, from Humaitá, Amazonas state, and Confresa, Mato Grosso state, prompted new insights into the geographic distribution and genetic diversity of this species. One of the records extends the species range circa 350 km beyond the previous southeastern limit. Voucher specimens had their identification confirmed by morphological comparison with the holotype and corroborated by molecular data (mitochondrial gene Cytochrome b). Our analyses revealed an east-west geographic structure into two clades that could represent distinct species, M. glirina and M. maraxina. Furthermore, examination of the holotype brought to light that it was never formally linked with the voucher specimen collected by Johann Natterer.
新记录显示，分布于整个亚马逊地区的短尾负鼠——格氏侏负鼠（Monodelphis glirina）在亚马孙州的胡迈塔以及马托格罗索州的孔弗雷萨被发现，这促使人们对该物种的地理分布和遗传多样性有了新的认识。其中一项记录将该物种的分布范围扩展到了此前东南部边界约350公里以外的地方。凭证标本通过与模式标本进行形态学比较得以确认，并得到了分子数据（线粒体基因细胞色素b）的佐证。我们的分析揭示了一种东西向的地理结构，分为两个分支，这两个分支可能代表着不同的物种，即格氏侏负鼠和马拉克侏负鼠（M. maraxina）。此外，对模式标本的检查发现，它从未与约翰·纳特勒收集的凭证标本正式关联起来。
