Alydus is the type genus of broad-headed bugs in the family Alydidae. There are about 11 described species in Alydus, including 2 extinct species.[1][2][3] Species are recorded from North America and Europe through to temperate Asia.[4]
Schaefer, Carl W.; Schaffner, Joseph C. (1994). "Alydus calcaratus in North America (Hemiptera: Alydidae)". Proceedings of the Entomological Society of Washington. 96: 314–317. ISSN0013-8797.
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