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some older local studies were overlooked. Representatives of the brachyuran genus Pilumnus Leach, 1816 (Decapoda: Pilumnidae), occurring along the Russian coasts of the Black Sea, were re-named several times with several subspecies described [Markuzen, 1868; Czerniavsky, 1868, 1884; Băcescu, 1967; Kobjakova, Dolgopolskaya, 1969; Spiridonov, Petryashov, 2011; Anosov et al., 2012; Anosov, Ignatyev, 2016; Marin, 2018]. Recently published data, based on both morphological and DNA analysis (see Marin [2018]), revealed the presence of only one species along the northern coastline of the Black Sea, namely Pilumnus aestuarii Nardo, 1869 (see Marin [2018]). At the same time, these data allowed to resurrect the older name, P. spinulosus, proposed by Kessler [1861] for the representatives of the genus from this part of the Black Sea. Karl Fedorovich (Karl-Friedrich) Kessler (1815– 1881), a famous zoologist and ichthyologist professor, one of the founders of the Sevastopol Biological Station (Crimean Peninsula), worked at the St. Vladimir University in Kiev (now Ukraine) in 1842–1861, where he conducted research on the aquatic fauna of the Black Sea region, mainly the northern shores of the Black and Azov seas, the Crimean Peninsula, the Dnieper, as well as the Neva and Volga river basins and the Ladoga and Onega Lakes (e.g., Bogdanov [1882]). In 1861, he published the monograph “Journey with a zoological purpose to the northern shore of the Black Sea and the Crimea in 1858”, with the description of two new decapod species, namely Pilumnus spinulosus Kessler, 1861 and Pagurus ponticus Kessler, 1860. Since then, Pilumnus spinulosus has been synonymized with Pilumnus hirtellus (Linnaeus, 1761) (e.g., Pesta [1918]; Schubart [2014]; Anosov & Ignatyev [2016]; Marin [2018]), while Pagurus ponticus is currently regarded as a junABSTRACT. The scientific name Pilumnus spinulosus Kessler, 1861 is resurrected for the representatives of the brachyuran genus Pilumnus Leach, 1816 (Decapoda: Brachyura: Pilumnidae), occurring along the northern coastal line of the Black Sea. This species has been mistakenly identified as P. hirtellus (Linnaeus, 1761) and recently, based on DNA data, referred to as P. aestuarii Nardo, 1869. Furthermore, a neotype of P. spinulosus Kessler, 1861 is designated as the original material is presently considered as lost. P. hirtellus ponticus Czerniavsky, 1868, P. aestuarii Nardo, 1869, P. hirtellus intermedia Czerniavsky, 1884 are considered as junior synonyms of P. spinulosus Kessler, 1861. How to cite this article: Marin I.N., d’Udekem d’Acoz C. 2019. Resurrection and neotype designation of Pilumnus spinulosus Kessler, 1861 (Crustacea: Decapoda) // Arthropoda Selecta. Vol.28. No.4. P.545– 548. doi: 10.15298/arthsel. 28.4.06