Abstract
Summary Structural and experimental data are given to compare Isopod anternnary organs with Decapod mandibulary organs (DMO). The physiological role of both organs is discussed and their involvement in vitellogenesis control is suggested. The recent detection of a hormonal activity in DMO was ascribed to methyl farnesoate (MF), rate of which is high in females completing vitellogenesis, nevertheless morphogenetic activity on larvae is not very clear, and advisable comparison with Insect corpora allata may be suggested. In Isopod and Decapods both organs are homologous, yet the proof of relevant synthesis by antennary organ of Peracaridea has to be demonstrated to extend the notion of a ‘JH activity’ to the whole group of Crustacea.
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