Un nouveau Macrogyrodactylus (Monogenea, Gyrodactylidae) parasite de Heterobranchus longifilis Valenciennes, 1840 (Téléostéen, Siluriforme) en Côte d'Ivoire
Some remarks on the subgenus Oligotrochus M. Sars, 1866 sensu Heding, 1935 (genus Myriotrochus, Myriotrochidae, Holothurioidea) with description of two new species
Redescription of Hippolyte ventricosa H. Milne Edwards, 1837 based on syntypes, with remarks on Hippolyte orientalis Heller, 1862 (Crustacea, Decapoda, Caridea)
Our dear colleague Alain Crosnier passed away in his 91st year on Feb. 18, 2021. He was internationally renowned for his scientific accomplishments, his skills as an organizer, and his boundless energy.