An assemblage of cylindrical trace fossils that occur in the Late Jurassic Missão Velha Formation is presented and interpreted to be the casts of lungfish burrows. These small-sized casts are interpreted as passive siliciclastic sedimentation into abandoned excavations made by lungfish, suggesting their presence in the Missão Velha Formation paleofauna. The identification is based on their morphological similarity to previously identified and extant lungfish burrows. The cross-section of the burrows is very similar to the modern burrow morphology of the African lungfish Protopterus along its full vertical length, indicating lungfish aestivation, and supplemented by spatial clustering reflecting gregarious behavior. The burrow fillings occur in siltstone lithofacies intercalated with cross-stratified fluvial sandstones. These strata were deposited in a continental environment that includes braided fluvial channels, floodplains, and paleosols. Lungfish burrows have been used to infer the presence of seasonal droughts in the geologic past, and the occurrence of lungfish burrows in the Missão Velha Formation adds new insights into the Late Jurassic climate of the Araripe Basin. This climate provided sufficient moisture punctuated by seasonally dry periods, affording a habitat that supported lungfish aestivation behavior.

出现在晚侏罗世 Missão Velha 组中的一组圆柱形痕迹化石被展示并解释为肺鱼洞穴的模型。这些小型铸件被解释为被动硅质碎屑沉积到由肺鱼进行的废弃挖掘中，表明它们存在于 Missão Velha 组古动物群中。鉴定是基于它们与先前鉴定的和现存的肺鱼洞穴的形态相似性。洞穴的横截面与非洲肺鱼Protopterus沿其整个垂直长度的现代洞穴形态非常相似，表明肺鱼处于夏眠状态，并辅以反映群居行为的空间聚类。洞穴填充物发生在粉砂岩中岩相夹有交叉层合河流砂岩。这些地层沉积在包括辫状河道、洪泛平原和古土壤在内的大陆环境中。肺鱼洞穴已被用来推断地质过去是否存在季节性干旱，Missão Velha 组中肺鱼洞穴的出现为阿拉里佩盆地晚侏罗世气候增添了新的见解。这种气候提供了充足的水分，并在季节性干旱期间打断，提供了一个支持肺鱼夏眠行为的栖息地。