The Occurrence of Amphiglena mediterranea (Leydig, 1851) (Annelida: Sabellidae) at the Romanian Coast of the Black Sea: A Case on an Unsuccessful Invasion?

摘要

During a study of fauna associated with a shallow-waterZostera(Zosterella)nolteimeadow from the southern part of the Romanian Black Sea coast, in August 2015, a sabellid polychaete identified asAmphiglena mediterraneawas found. This represents a new record for the Romanian coast of the Black Sea. Three individuals were collected from muddy fine sand at 1.5 m depth at Mangalia, at salinity of 17.4 PSU and temperature of 23.2 degrees C. Subsequent repeated sampling in the same area (in 2018 and 2019) did not revealed any additional individuals of this species. Therefore, the occurrence ofA. mediterraneaat the Romanian Black Sea coast might be regarded as an unsuccessful invasion.