Hadronector is an extinct genus of prehistoric marine coelacanth which lived during the mid-Carboniferous of North America. It contains a single species, H. donbairdi, known from well-preserved remains recovered from the Serpukhovian (about 324 million years ago)-aged Bear Gulch Limestone lagerstätte of Montana, US. It is the type genus of the family Hadronectoridae, which contains only one other known genus, the co-occurring Polyosteorhynchus.