The Inachoididae spider crabs (Crustacea, Brachyura) from the Neogene of the tropical Americas

Abstract The spider crabs Willinachoides santanai n. gen. sp. from the early-middle Miocene of north Brazil and Paradasygyius rodriguezi late Venezuela are described illustrated. Additionally, Eoinachoides senni Van Straelen, 1933, Oligocene–early Venezuela, is redescribed based on photographs holotype, diagnosis latispinosus Carriol, Muizon, Secretan, 1987, Peru, emended also basis holotype. past distribution points to a Tethyan background for current amphi-American Inachoididae, with oldest fossil species known early Eocene regions (Pakistan Italy), Eocene–late Pliocene Americas. high number monotypic genera in Inachoididae could be result rapid dispersion followed by diversification during Neogene tropical America, facilitated global regional events (e.g., eustatic sea level changes, Mi-1 Oligocene-Miocene boundary cooling, warming period Middle Climate maximum, closure Panama Isthmus, marine incursions into Amazon Basin). shoaling final Central American Seaway thought have critically affected evolution inachoidids shaped their patterns. UUID: http://zoobank.org/6275fdc4-4bfa-4873-9320-3143d4915172 .