What is "thyreocorinae"

The Thyreocorinae (formerly Thyreocoridae at the family level) are a subfamily of shield bugs, known by common names that include negro bugs or ebony bugs. Some classifications placed them as a subfamily within the broad family Cydnidae; however, Cydnidae now has a more restricted formulation, and the Thyreocorinae are now placed within the Corimelaenidae. They were formerly recognized at the family level as Thyreocoridae by the classifications of Henry & Froeschner and Rider.