ONE NEW SPECIES OF A NEW GENUS, NEOAXIUS GEN. NOV., IN A NEW FAMILY, NEOAXIIDAE FAM. NOV., FROM THE GULF OF NICOYA, COSTA RICA (DECAPODA, AXIOIDEA).

Currently, the superfamily Axioidea Huxley, 1879 includes nine families (Sakai, 2011). However, recent examination of material from the Gulf of Nicoya, Costa Rica, Pacific side, presented the occurrence of a new species, Neoaxius nicoyaensis gen. et sp. nov. The deviant morphology of the genital organs of this new species can nowhere be observed in any of the known genera of the families included in the Axioidea. This necessitated the author to establish a new family, Neoaxiidae fam. nov., based on the new genus Neoaxius gen. nov. The new family is safely included in the Axioidea as a tenth member of that superfamily. [ABSTRACT FROM AUTHOR]