New remarkable hell ants (Formicidae: Haidomyrmecinae stat. nov.) from mid-Cretaceous amber of northern Myanmar

Haidomyrmecines (hell ants) are a group of putatively predatory ants defined by mandibles that are dorsoventrally expanded, and highly modified heads with a variety of cranial appendages. These ants are known exclusively from three Cretaceous amber deposits in France, Myanmar, and Canada. Here we describe four new genera and five new species from specimens preserved in mid-Cretaceous (uppermost Albian–lowermost Cenomanian, ca. 99 Ma) amber from...