The genus Menippe is a group of crab species that belong to the family Xanthidae. Commonly referred to as the stone or arrow crabs, these crustaceans are found in the western Atlantic Ocean and the Gulf of Mexico. Several synonyms of the word Menippe include Cyllopsis, Heteroxanthops, and Menippos. These synonyms were initially confused with the genus Menippe, resulting in taxonomic confusion. However, through advanced molecular and phylogenetic studies, it has been determined that Menippe is a monophyletic group with unique genetic and morphological characteristics. Understanding the genus Menippe and its synonyms is crucial for accurate classification and further research on these fascinating crustaceans.