Mid-Cretaceous amber from Northern Myanmar, also known as "burmite", contains the most productive and species-rich amber sites in the world. Up to now, 17 families of cockroaches in Burmese amber have been documented. However, only four extinct species of family Mesoblattinidae have been reported in Burmese amber so far: Spinaeblattina myanmarensis Hinkelman, 2019; Mesoblatta maxi Hinkelman, 2020; Cuniculoblatta brevialata Hinkelman, 2021; and Mongolblatta sendii Hinkelman, 2021. The new species Sivis tykadlo sp. n. described here on the basis of both sexes give us an opportunity to better understand the morphological and ecological characters of Cretaceous cockroaches and the entire fauna. An ecosystem with a humid climate in the mid-Cretaceous apparently enriched the diversity of cockroach species. This fossiliferous amber has produced more than 4,000 cockroach specimens of many different forms and lifestyles. [ABSTRACT FROM AUTHOR]