Ptychophallus costaricensis, a new freshw ater crab from Costa Rica by Carlos R. Villalobos" ( Received foc publi"tion M"cch
9,
1973)
ABSTRACT: A new freshw.ter c rab o f the genus PI),chophallus i s describcd from Costa Rica, based on the morpholo¡;y of t he gonopod. The specio. ¡ives under r(x:ks in sm:.l ll strt:ams at an altitude- of approximately 1 , 300 m and at a median wat