The homalonotid trilobiteBurmeisteriaSalter, 1865 is revised from material from the Lower Devonian of central western Argentina (the Talacasto Formation in the Precordillera Basin). In contrast to other closely related Devonian marine basins from South America (mainly Bolivia, Brazil and Uruguay), the only species recognized in Argentina includeBurmeisteria herschelii(Murchison, 1839) andB.notica(Clarke, 1913). New observations on the structure of the carapace indicate that structures sometimes interpreted as granules with taxonomic meaning are, in fact, taphonomic characters that represent the fillings of pore canals exposed by decortication. The antero-ventral process of the rostral plate may be a locking device during enrollment, which allowed long-term defensive behavior with a minimum of muscular energy.Burmeisteriais an upper Silurian to Middle Devonian endemic representative of southwestern Gondwanan (Malvinokaffric) basins. In the Argentine Precordillera Basin, this genus is virtually restricted to a sandy, Pragian, stratigraphic interval capped by a marker bed first reported by Keidel in 1921.

中文翻译：

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1865 年在阿根廷下泥盆统的三叶虫类三叶虫 BurmeisteriaSalter：冈瓦纳西南部背景下的新数据

同型三叶虫蒲公英Salter, 1865 改编自阿根廷中西部下泥盆统（Precordillera 盆地的 Talacasto 组）的材料。与来自南美洲（主要是玻利维亚、巴西和乌拉圭）的其他密切相关的泥盆纪海洋盆地相比，阿根廷唯一认可的物种包括Burmeisteria herschelii（默奇森，1839 年）和乙.公告（克拉克，1913 年）。对甲壳结构的新观察表明，有时被解释为具有分类意义的颗粒的结构实际上是代表因脱皮暴露的孔道填充物的埋藏特征。延髓板的前腹突可能是注册期间的锁定装置，它允许以最少的肌肉能量进行长期防御行为。蒲公英是冈瓦南（Malvinokaffric）西南部盆地的上志留纪至中泥盆纪特有的代表。在阿根廷的 Precordillera 盆地，该属实际上仅限于沙质的 Pragian 地层层段，该层段由 Keidel 在 1921 年首次报道的标记层覆盖。