Clark
The taxon authority Clark may refer to:
- Ailsa McGown Clark (1926–2014), British zoologist, paleontologist, specialised in Echinodermata
- Austin Hobart Clark (1880–1954), U.S. zoologist
- Benjamin Preston Clark (1860–1939), U.S. entomologist
- Bonnie Lynne Clark (born 1966; B.L.Clark), botanist
- Bracy Clark (1771–1860), English veterinary surgeon specialising in the horse, and entomologist
- Bruce L. Clark (1880–1945), U.S. micropaleontologist and geologist
- Carolyn A. Clark (fl. 1979; C.A.Clark), botanist
- Darren A. Clark (fl. 1996), microbiologist
- David Leigh Clark, ostracodologist
- Douglas John Clark (1929–1971), English arachnologist
- Elizabeth G. Clark, palaeontologist
- Erica D. Clark, U.S. herpetologist
- Eugenie Clark (1922–2015), U.S. ichthyologist
- Ellen Clark (1915–1988), naturalist
- George Archibald Clark (1864–1918), academic secretary to David Starr Jordan
- Gowan C. Clark (1888–1964), South African lepidopterist
- Hamlet Clark (1823–1867), English clergyman and naturalist
- Helen Elizabeth Shearburn Clark (1936–2014), New Zealand zoologist
- Henry James Clark (1826–1873), U.S. naturalist and cnidariologist
- Howard Walton Clark (1870–1941), U.S. ichthyologist
- Hubert Lyman Clark (1870–1947), U.S. zoologist
- Huon L. Clark Australian arachnologist
- James Curtis Clark (born 1951; C.Clark), botanist
- James Matthew Clark (born 1956), paleontologist
- Janice Clark, U.S. carcinologist
- John Clark (1885–1956), Scottish-Australian myrmecologist
- John Joseph Clark (1898–?; Clark), botanist
- John Littner Clark (born 1969; J.L.Clark), botanist
- John M. Clark, New Zealand acarologist
- John R. Clark (fl. 2009; J.R.Clark), botanist
- Jonathan Y. Clark (fl. 1983; J.Y.Clark), botanist
- Josephine Adelaide Clark (1856-1929; J.A.Clark), U.S. botanist
- Linda L. Clark, U.S. bacteriologist
- Lois Clark (1884-1967; L.Clark), U.S. botanist
- Lynn G. Clark (born 1956; L.G.Clark), U.S. botanist
- Malcolm R. Clark, carcinologist
- Michael J. Clark (fl. 2011; M.J.Clark), botanist
- Paul F. Clark, British carcinologist
- Richard J. Clark, U.S. herpetologist
- Robert Selbie Clark (1882–1950), Scottish marine zoologist
- Roger N. Clark, U.S. marine zoologist
- Ruth Clark (born 1975; R.Clark), British botanist
- Shawn M. Clark, U.S. entomologist
- Stephanie A. Clark, U.S. malacologist
- Terence Paul Clark (fl. 1994; T.P.Clark), botanist
- Thomas H. Clark (1893–1996), British-Canadian geologist and paleontologist
- Truman Benton Clark (1928–1984), U.S. protozoologist
- Vincent Ralph Clark (fl. 2009; V.R.Clark), botanist
- Walter C. Clark, New Zealand nematologist
- W. Dennis Clark (born 1948; W.D.Clark), botanist
- William Bullock Clark, American geologist and paleontologist
- William H. Clark, phycologist
- William S. Clark, U.S. ornithologist