Stefani, Phytochemical study and chemotaxonomic investigation of species of Dimerostemma genus (Asteraceae, Heliantheae) and the use of microsampling of glandule
trichomes, Sciences and Letters, University of Sao Paulo, Sao Paulo, Brazil, 2002.
Each oyster gonad was ascribed to 1 of the 5 maturation degrees established and described as follows: NO, empty gonad; EA, early gonad activity, white ramifications in the gonad; BF, gonad begins to fill, digestive glandule
perfectly seen; PD, gonad poorly developed, digestive glandule
partially seen; D, gonad developed, perfectly covers digestive gland; and TD, gonad totally developed, stands voluminously.