A rare early Campanian (Aquilan) assemblage consisting of disarticulated anuran bones is described from the Aguja Formation of West Texas, USA. Many specimens within the assemblage pertain to taxonomically informative elements (maxillae, urostyles, and ilia). Morphological variety among specimens pertaining to each suggests high local species richness comparable with that seen elsewhere among frogs from similarly well-sampled localities of the Late Cretaceous Western Interior. Comparison between environmentally and temporally analogous microvertebrate assemblages in southern Utah, USA, reveals that anurans in both areas exhibit morphological similarities consistent with regionally allied ‘southern’ faunas. Among their differences, one character (dorsal protuberance of the ilium) consistently exhibited among some ilial morphotypes from Utah is conspicuously absent among those of West Texas. Two ostensibly exclusive ilial morphs in West Texas add additional support to the presence of taxonomically segregated, sub-regional populations of anurans in southern Laramidia during early to middle Campanian time.

美国西德克萨斯州的Aguja地层描述了一种罕见的早期Campanian（Aquilan）组合，其中包括离焦的无环骨骼。组合中的许多标本都与生物分类学信息有关（上颌骨，尿路标和s骨）。属于每个物种的标本的形态多样性表明，其高物种丰富度可与晚白垩纪西部内陆地区类似采样的青蛙中其他地方的物种丰富度相媲美。在美国犹他州南部的环境和时间类似的微脊椎动物组合之间进行比较，发现这两个区域的无脊椎动物都表现出与区域盟友的“南部”动物区系一致的形态相似性。他们之间的差异 在得克萨斯州的一些回形形态中始终表现出一个特征（the背突），而在西得克萨斯州则明显不存在。西得克萨斯州有两个表面上独特的虫变体，在Campanian早期至中期，在拉拉米迪亚南部，按分类学分类的亚区域无核种群的存在增加了额外的支持。