engleski

A new sediment dwelling and epizoic species of Olifantiella (Bacillariophyceae), with an account on the genus ultrastructure based on Focused Ion Beam nanocuts

The marine diatom Olifantiella Riaux-Gobin & Compère predominantly occurs in tropical Indo- Pacific coral reef environments. The genus has about a dozen validly published taxa and is characterized by transapically elongate striae composed of a macroareola, broad perforated girdle, and tubular buciniportula process of trumpet-shape. The valve mantle of taxa related to the generitype, O. mascarenica, have a funnel- shaped structure around the valve at the face / mantle junction, while those to O. gorandiana have a simple mantle or strongly reduced funnel and complex buciniportula composed of hollow processes. The geographic distribution of Olifantiella is expanded in this study to include species observed in loggerhead sea turtles scrapes from the Aegean Turkish coast and samples from the Turkish Black Sea and Adriatic Sea coasts. Olifantiella has also been identified in Martinique Island, Caribbean Sea. An application of the Focused Ion Beam (FIB) to a sequential cutting of frustules allows resolution of Olifantiella valve ultrastructure.

diatoms ; epizoic ; Focused Ion Beam technique ; marine coasts ; new species ; Olifantiella ; sediment dwelling ; ultrastructure

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