In the 1950s, Carlos Rusconi reported the biostratigraphically important Furongian trilobites Elvinia Walcott and Irvingella Ulrich and Resser from an exotic limestone block (La Cruz Olistolith) of the San Isidro area, Precordillera of Mendoza, western Argentina. Although several local species were erected by Rusconi at that time, most of them were later listed as junior synonyms of E. roemeri (Shumard) or I. major Ulrich and Resser, and this was followed in subsequent studies. A systematic revision of all the available specimens of Elvinia and Irvingella from the Rusconi collection at the Museo de Ciencias Naturales y Antropológicas J.C. Moyano (Mendoza) is provided herein. The occurrence of E. roemeri is supported by the present study, while the associated Irvingella species include I. jorusconii Rusconi, I. platycephala Rusconi, and Irvingella sp. The latter represent “advanced” forms in terms of morphological development in the Irvingella lineage, and these, together with E. roemeri, are typical of the uppermost part of the Elvinia Zone (uppermost Steptoean). Irvingella jorusconii, I. platycephala, and Irvingella sp. appear to be endemic to the Argentinian Precordillera, but are related to species from central Texas and northwest Canada.

中文翻译：

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来自阿根廷西部门多萨 Elvinia 带（晚寒武世，芙蓉纪）的 Elviniid 三叶虫

1950 年代，Carlos Rusconi 报道了具有重要生物地层意义的芙蓉纪三叶虫埃尔维尼亚沃尔科特和欧文盖拉Ulrich 和 Resser 来自阿根廷西部门多萨的 Precordillera 圣伊西德罗地区的一个异国情调的石灰岩块 (La Cruz Olistolith)。虽然当时鲁斯科尼竖立了几个当地物种，但其中大部分后来被列为乙.罗梅里（舒马德）或一世.重大的Ulrich 和 Resser，在随后的研究中也遵循了这一点。对所有可用样本进行系统修订埃尔维尼亚和欧文盖拉本文提供了来自 Museo de Ciencias Naturales y Antropológicas JC Moyano（门多萨）的 Rusconi 收藏。的发生乙.罗梅里得到本研究的支持，而相关的欧文盖拉物种包括一世.乔鲁斯科尼鲁斯科尼，一世.桔梗鲁斯科尼和欧文盖拉sp。后者代表了在形态发展方面的“高级”形式。欧文盖拉血统，还有这些，连同乙.罗梅里, 是典型的最上部埃尔维尼亚区域（最上面的 Steptoean）。欧文氏菌,一世.桔梗， 和欧文盖拉sp。似乎是阿根廷Precordillera的特有种，但与得克萨斯州中部和加拿大西北部的物种有关。