Glossary of "Cladistics (2nd ed.)" by Kitching et al. (1998)
- A test of primary homology. To pass the conjunction test, two characters hypothesized to be homologous must not coexist in an organism at the same time. See also congruence test, similarity test.
- Kitching, I. J., Forey, P. L. Humphries, C. J. & Williams, D. M. 1998. Cladistics, 2nd ed.: the Theory and Practice of Parsimony Analysis. -xii + 228 pp. Oxford University Press, New York.