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DistributionWhen the first species of Hemigrapsus was introduced to European coasts ca. 1995, Hemigrapsus takanoi Asakura & Watanabe, 2005 was obviously not described ; so, logically, the crab was named Hemigrapsus penicillatus (De Haan, 1835) [See Noël P. Y., Tardy E., d'Udekem d'Acoz C., 1997. Will the crab Hemigrapsus penicillatus invade the coasts of Europe? C. R. Acad. Sci. Paris, Sciences de la Vie, 320: 741-745, fig. 1-2.]. Subsequent years, this name was used many times for European records.