A palynological assemblage from one sample of the Yacoraite Formation outcrops (Maastrichtian–Danian of the Salta Basin) at the Valle del Tonco, Salta Province, Argentina, is described. The flora is distinctly continental and dominated by angiosperms, accompanying ferns and gymnosperms, along with few freshwater algae, bryophytes and fungi. The presence of taxa such as Aquillapollenites magnus, Gabonisporis vigorouxii and Crassitricolporites brasiliensis, together with the absence of typical taxa of the Danian Mtchedlishvilia saltenia Zone, allow to propose a late Maastrichtian age for this palynoflora. Due to its location at mid-latitudes, the palynoflora from the Yacoraite Formation is within a transitional or mixed flora zone with closer affinity to the equatorial Palmae Province. Therefore, the recorded flora has a good potential to understand the transition between the floras of low and high latitudes and to know the floristic composition of the area before the K-Pg extinction event.

描述了来自阿根廷萨尔塔省 Valle del Tonco 的 Yacoraite 组露头（萨尔塔盆地的 Maastrichtian-Danian）一个样本的孢粉组合。植物区系明显是大陆性的，以被子植物为主，伴随着蕨类植物和裸子植物，以及少量淡水藻类、苔藓植物和真菌。类群如Aquillapollenites magnus , Gabonisporis vigorouxii和Crassitricolporites brasiliensis的存在，以及大年夜蛾 Mtchedlishvilia saltenia的典型类群的缺失区域，允许为这种孢粉植物提出晚马斯特里赫特时代。由于位于中纬度地区，来自 Yacoraite 组的孢粉植物群属于过渡或混合植物区系，与赤道 Palmae 省的亲缘关系更近。因此，记录的植物区系具有很好的潜力，可以了解低纬度和高纬度植物区系之间的过渡，以及了解 K-Pg 灭绝事件之前该地区的植物区系组成。