Two new species of cockroaches preserved in amber have been found in a mine located in Hukawng Valley, Myanmar. The new species are named Mulleriblattina bowangi and Crenocticola svadba and placed in the Nocticolidae family. The mine where the new cockroach species were found is dated to about 99mya and represent the first and only creatures to be discovered living in caves before the Cretaceous–Paleogene extinction event.
https://cosmosmagazine.com/palaeontology/dinosaur-age-cockroaches-are-the-earliest-known-cave-dwellers
The paper describing the new findings is found here (Sendi et al., 2020)
https://www.sciencedirect.com/science/article/pii/S1342937X20300496?via%3Dihub