Androgenic hormone specificity in terrestrial isopods (Oniscidea): Systematic involvements

Heterospecific implantations of androgenic glands (AG) showed that the male hormone of terrestrial isopods had a relatively high-action specificity. W ithin a zoological genus the hormone of one species was effective in the ot her species of the same genus. This was not always the rule between species from different genera of the same family or between species belonging to d ifferent families. The male hormone was ineffective in species belonging to different suprafamilies (Oniscoidea and Porcellionoidea) and suborders (Ty lomorpha and Ligiamorpha). These new results allowed the relationships betw een different genera of a given family and between different families and s uprafamilies to be identified. The neurohormone controlling AC growth was a lways species-specific.