Thomas
The taxon authority Thomas may refer to:
- A.P. Thomas, Indian annelidologist
- Annick Le Thomas (born 1936; Le Thomas), botanist
- Arianna Thomas, Venezuelan entomologist
- Asha Thomas, Indian entomologist
- Bethia Thomas, palaeontologist
- B.W. Thomas, New Zealand herpetologist
- Berthold Ernst Friedrich Thomas (1910-?; B.Thomas), botanist
- Charles Arden Thomas (1938–1973; C.A.Thomas), botanist
- Cyrus Thomas (1825–1910; C.Thomas), U.S. entomologist and botanist
- Donald B. Thomas, U.S. entomologist
- Duncan W. Thomas (fl. 1986; D.W.Thomas), botanist
- Eugen A. Thomas (1912–1986; E.A.Thomas), Swiss naturalist (limnology and lichenology)
- Gavin H. Thomas (fl. 2009), herpetologist
- Hans-Peter Thomas (fl. 2001; H.P.Thomas), botanist
- Herbert Thomas, French palaeontologist
- Hugh Hamshaw Thomas (1885–1962; H.H.Thomas), British botanist
- James Darwin Thomas, U.S. carcinologist
- Jennifer C. Thomas, U.S. entomologist
- Jinesh P. Thomas, Indian ichthyologist
- John Hunter Thomas (1928–1999; J.H.Thomas), U.S. botanist
- Michael Jared Thomas, U.S. entomologist
- Matthew R. Thomas, ichthyologist
- Michael Charles Thomas (1948–2019), U.S. entomologist
- Oldfield Thomas (1858–1929; Thomas), English zoologist
- (John Paul) Richard Thomas (born 1938), U.S. herpetologist
- Richard H. Thomas (fl. 1998), British zoologist
- Robert Allen Thomas, U.S. herpetologist
- Sabu K. Thomas, Indian entomologist
- Sarah Thomas (born 1968; S.Thomas), English botanist
- Sinjumol Thomas (fl. 2015; Sinj.Thomas), Indian botanist
- William Wayt Thomas (born 1951; W.W.Thomas), U.S. botanist