Three sesarmid crabs, Neosarmatium asiaticum Ragionieri, Fratini and Schubart, 2012, N. indicum (A. Milne-Edwards, 1868), and Tiomanium indicum (H. Milne Edwards, 1837), are reported based on specimens collected from Miyako-jima Island, Ryukyu Archipelago,

The xanthid genus Medaeops Guinot, 1967 currently contains seven species reported from the Indo-West Pacific region. However, only one species, Medaeops granulosus (Haswell, 1882), has been recorded from China seas and was once thought to be widespread

The genus Panopeus belongs to the family Panopeidae and comprises a group of brachyuran crabs native to the American continent (except for P. africanus). However, taxonomic problems related to the presence of cryptic species have made it difficult to