Microbacterium virus MuffinTheCat is a species of bacteriophage in the family Tectiviridae. It was collected and identified by on 1 October 2019. It is part of the and the GE . Microbacterium of the species serve as natural hosts. Microbacterium virus MuffinTheCat is morphologically almost indistinguishable from its sibling species in the Tectiviridae family, but it along with its sibling species in the GE are different enough from other Tectiviridae members that the GE may soon be identified as a new genus. Microbacterium virus MuffinTheCat is identified from other GE members by its genome differences.