Early Cretaceous synapsids of North America

Cifelliodon is an extinct genus of mammaliaform known from the Yellow Cat Member of the Cedar Mountain Formation in Utah, United States, dated to the Early Cretaceous. It contains the species Cifelliodon wahkarmoosuch, described in 2018 based on an isolated skull. This specimen is well preserved and large for a mammaliaform of its time period. Its teeth have been compared to those of the hammer-headed bat, a fruit-eater, while CT scans of the inner skull indicate a highly developed sense of smell. Some of its features resemble those of earlier mammaliamorphs of the Triassic, while others are s