Sigvart Thorkelsen (1856–1937), Norwegian arachnologist and entomologist, and one of the founders of the Norwegian entomological society (Norsk entomologisk forening). Often published as Sig Thor or Sig. Thor.
After his death, his entire collection was destroyed in accordance with his will.
- 16 taxon names authored by Sigvart Thorkelsen (List may be incomplete)
(List may be incomplete)
- Thor S., 1900. Prodromus systematis Hydrachnidarum.
- Thor S., 1900. Første undersøgelse af Norges Rhyncholophidae.
- Thor S., 1900. Første undersøgelse af Norges trombidiidae.