First record of two species of hermit crabs (Decapoda, Paguridae) from South Korea, with remarks on the associated hydrozoan, Hydrissa sodalis

Abstract

Two pagurid species,Pagurus quinquelineatusKomai, 2003 andPagurus rectidactylusKomai, Saito & Myorin, 2015, are reported from South Korea.Pagurus nigrivittatusis most similar to these two species among the congeneric species known from South Korea. The additional morphological differences betweenP. quinquelineatusandP. rectidactylusare provided briefly. The most distinct feature of the South KoreanP. rectidactyluscompared to the original description is that an associated hydrozoan,Hydrissa sodalis(Stimpson, 1858) instead ofBouillonactinia misakiensis(Iwasa, 1934) is responsible for the carcinoecia. The association ofH. sodaliswith other hermit crabs in South Korea was investigated.