1. Of Aristarchus, freedman, A nomenclator.” Description

2. Species within the genus Risella include: Risella tantillus Nomenclator Zoologicus info

3. GRATIARUM Actiones -----[ page update: 2020-III-30 ] We extend our sincere appreciation to numerous colleagues, worldwide, for their invaluable assistance and cooperation over the years when compiling the original nomenclator N.O