Soft-bottom crustacean fauna from the Turkish coast of the Black and Marmara seas with new records

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Abstract It is becoming increasingly important to monitor zoobenthic biodiversity in seas that are under industrial and anthropogenic pollution pressure, such as the Black Sea and the Marmara Sea. This study covers crustacean species in the Turkish waters of the Black Sea and the Marmara Sea, both of which are closed systems. Sampling was carried out in July–August 2019 and yielded 32 crustacean species from the Black Sea and 77 species from the Marmara Sea. In the Marmara Sea, two species [Kupellonura mediterraneaandLeucon(Macrauloleucon)siphonatus] represent new records for the Turkish waters, and 12 species [Cirolana cranchii,Cumella(Cumella)pygmaea, Cyathura carinata,Cymodoce truncata,Eurydice pulchra,Gammaropsis sophiae,Harpinia truncata,Iphinoe serrata,Iphinoe trispinosa,Liocarcinus pusillus,Nebalia strausiandSynchelidium maculatum] are new to the Marmara Sea. The following species:Gammaropsis palmata,Pontocrates arenarius, andSynchelidium haplochelesare new records for the Black Sea. The order Amphipoda dominated in both seas in terms of the number of species and the number of individuals.