Two new species of sesarmid crabs (Crustacea: Decapoda: Brachyura) associated with limestone formations in West Papua, Indonesia

Two new species of karst sesarmid crabs of the genus Karstarma Davie & Ng, 2007, are described from western Papua, Indonesia. Karstarma ardea n. sp. differs from the allied K. ultrapes (Ng, Guinot & Iliffe, 1994) from the Solomon Islands by its proportionately shorter ambulatory legs and the shape of its vulva. Karstarma waigeo n. sp. is closest to K balicum (Ng, 2002) from Bali, Indonesia, but differs in its proportionately longer ambulatory legs and in the morphology of the male first gonopod. © 2009 . Magnolia Press.