Abstract / Introduction / Summary:
Ptychognathus makii (Varunidae) is reported based on the specimens collected from the south coast of Kyushu and Okinawa Island, southern Japan. This species was considered “P. affinis” in previous Japanese literature. However, the specimens in this study and the illustration of the holotype of P. affinis are slightly different. In this report, morphological and environmental information on P. makii are briefly described. In addition, distinguishing characters between the species and P. altimanus are provided.