New fossil plants are described from the Ischichuca Formation (Middle?–Late Triassic), La Rioja province, northwestern Argentina. A systematic description of Heidiphyllum leaves, ovulate structures of Dordrechtites and undetermined conifer wood is provided. This is the first description of these elements for the Ischichuca Formation, and the first illustration of Dordrechtites from South America, thus extending the Gondwana distribution. Two species of Heidiphyllum are described: H. elongatum and H. minutifolium. Special interest is paid to the taxonomic assignment of Dordrechtites, which has been interpreted by several authors, based on morpho-anatomic features, as a member of different groups (i.e. Voltziales, Coniferales (=Pinales), Dordrechtitales, Corystospermales (=Umkomasiales) and other seed ferns. Herein Dordrechtites is interpreted as a gymnosperm ovule-bearing organ with foliar cupules, related to seed ferns.

从阿根廷西北部拉里奥哈省的Ischichuca组（中层—晚期三叠纪）描述了新的化石植物。的系统描述Heidiphyllum叶的排卵结构Dordrechtites提供和不确定的针叶树。这是这些元素为Ischichuca形成的第一说明，以及第一插图Dordrechtites从南美，从而延长了冈瓦纳分布。描述了Heidiphyllum的两种物种：伸长长杆菌（H. elongatum）和小茴香H. minutifolium。对多德雷赫特人的生物分类分配给予特殊利益，已由几位作者解释，基于形态内解剖特征，如不同的组的成员（即Voltziales，Coniferales（=松柏目的），Dordrechtitales，Corystospermales（= Umkomasiales）和其它种子蕨类植物。这里Dordrechtites被解释为裸子植物胚珠，具叶形小杯，与种子蕨类植物有关。