Ten species ofArmadilloniscusUljanin 1875 collected from the coasts of the Indian and Pacric oceans are recorded. Six species, namelyA. lamellatusfrom Somalia, West and East Malaysia, Indonesia and the Philippines,A. malaccensisfrom West Malaysia,A. iliffeifrom New Caledonia,A. hatoaiianusfrom the Hawaiian Islands,A. cong'obatorfrom New Caledonia, andA. bilionifrom Indonesia, are described as new Diagnostic characters ofA. quadricornisVandel 1970,A. mirabilisFerrara 1974 andA. indicusFerrara & Taiti 1983 are illustrated.A. litoralisBudde-Lund 1885 is recorded from West Malaysia, Hong Kong, North Korea and the Hawaiian Islands. A map and comments on the distribution of all the species ofArmadilloniscusare included, together with a cladistic analysis of the probable phylogenetic relationships between the species.