English: Copy of File:Bertholletia excelsa fruit and seeds.jpg, created by P. S. Sena, edited by User:RoRo. Brazil nut image to illustrate seed Tegmen & testa.
The terminology of the terms is unstable See ref: Schmid, Rudolf. “On Cornerian and Other Terminology of Angiospermous and Gymnospermous Seed Coats: Historical Perspective and Terminological Recommendations.” Taxon, vol. 35, no. 3, 1986, pp. 476–491. JSTOR, www.jstor.org/stable/1221901. Accessed 7 Apr. 2020.