The Minute Alga <i>Schizocladia ischiensis</i> (Schizocladiophyceae, Ochrophyta) Isolated by Germling Emergence from 24 m Depth off Rhodes (Greece)
Rizouli, Anastasia | Küpper, Frithjof C. | Louizidou, Paraskevi | Mogg, Andrew O. M. | Azzopardi, Elaine | Sayer, Martin D. J. | Kawai, Hiroshi | Hanyuda, Takeaki | Peters, Akira F.
Substratum collected during diving surveys of sublittoral communities off the Greek island of Rhodes (Dodecanese, South-East Aegean) in late 2015 was incubated in the laboratory. Among the emerging macroalgal germlings, there was the second-ever record and isolate of the small benthic multicellular alga <i>Schizocladia ischiensis</i> of the poorly known monotypic Schizocladiophyceae, the sister group of the brown algae (Phaeophyceae). Its nuclear ribosomal small subunit, Rubisco spacer (<i>rbc</i>L, <i>psa</i>A, and <i>psb</i>C sequences (in total 5237 bp)) were similar to those of the only previous isolate of the species from Ischia, western Mediterranean. Our new strain formed branched upright thalli attached to the substratum by an amorphous substance secreted at the bottom of the basal cell. It is possible that <i>S. ischiensis</i> is a common member of the infralittoral and circalittoral communities in the Mediterranean and generally overlooked because of its minute size. Germling emergence appears to represent the method of choice to reveal benthic algae of this small size.
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