Abstract In the late Pleistocene, Panochthus was the most diverse genus of glyptodontids with five species: P. jaguaribensis, endemic to the intertropical region of Brazil, P. hipsilis from Bolivia, P. greslebini from Brazil and Argentina, P. tuberculatus from Uruguay and Argentina and P. frenzelianus, probably from the Pampean region, Argentina. In this paper we describe the robust caudal tube of a new species, Panochthus florensis n. sp., that inhabited the center of the Pampean region of Argentina at the end of the Pleistocene. The reduction in the number of central figures, a single apical figure, the absence of an apexian figure, and the lack of figures between the first pair of dorsal figures allow a rapid differentiation from the already known species. The striking diversity of Panochthus contrasting with that of other late Pleistocene glyptodontids, lead us to propose hypotheses for explaining this fact.

中文翻译：

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阿根廷晚更新世Panochthus (Xenarthra, Glyptodontidae) 一新种

摘要 在晚更新世，Panochthus 是雕齿龙科最多样化的属，共有 5 种：巴西热带地区特有种 P. jaguaribensis、玻利维亚的 P. hipsilis、巴西和阿根廷的 P. greslebini、乌拉圭的 P. tuberculatus 和阿根廷和 P. frenzelianus，可能来自阿根廷的 Pampean 地区。在本文中，我们描述了一个新物种 Panochthus florensis n 的坚固尾管。sp.，在更新世末期居住在阿根廷潘佩斯地区的中心。中心图形数量的减少、单个顶端图形、先端图形的缺失以及第一对背图形之间图形的缺失使得与已知物种的快速区分成为可能。