Which two spider genera are cited as examples of those whose venom poses a genuine threat to humans?

Answer

Latrodectus (widows) or Loxosceles (recluses)

The text contrasts the harmless nature of the kite spider's venom with the genuine threat posed by the venom composition of genera like Latrodectus and Loxosceles.

Which two spider genera are cited as examples of those whose venom poses a genuine threat to humans?
spidervenomarachnidkite spider