Redescription and systematic position ofPseudofabricia aberransCantone, 1972 (Polychaeta, Sabellidae, Fabriciinae)
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Abstract The redescriptions of the sabellid polychaete genus Pseudofabricia and of the type species P. aberrans Cantone, 1972 are reported. The species was previously described from incomplete material. The features of the tentacular crown, lacking in the original description, are reported here. Pseudofabricia seems to be closely related to Fabricia Blainville by the presence of well‐developed dorsal lips and to Novafabricia Fitzhugh in the shape of the anterior peristomial ring ventrally developed as a tongue‐like process. The genus is endemic to the Mediterranean Sea and P. aberrans is most common in shallow Posidonia oceanica beds.Abstract Apoglossum gregarium , a minute deep-water red alga considered an alien in the Mediterranean Sea, was previously known only from the western basin. The present paper reports A. gregarium for the first time off Greece, in the eastern Mediterranean basin. It was found on artificial substrata at 50 m depth in the southeastern Ionian Sea. The Greek specimens were identical to previous Mediterranean descriptions. Moreover, the Greek habitat is the deepest ever recorded for the species. Associated flora as well as biogeographical data are also provided. Based on its worldwide distribution, the possibility that A. gregarium is native to the Mediterranean Sea should not be ruled out.
Mediterranean Basin
Flora
Alien species
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ABSTRACT In ca. 170 plankton samples from the eastern Mediterranean Sea 15 species of hydro-medusae were found; six of these occur in the western Mediterranean but have not previously been found in the eastern part. Four species are new to the Mediterranean Sea; probably two of these have been transported through the Suez Canal from the Red Sea. Data of the stations where the plankton has been collected are included.
Suez canal
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