Gongolaria barbata f. aurantia (Kützing) Falace, Alongi et Kaleb comb. nov.

Basionym: Cystoseira aurantia Kützing, 1843: 357 . Phycologia generalis……Leipzig XXXII+458 pp, 80 pls.

Homotypic synonym:

Cystoseira barbata f. aurantia (Kützing) Giaccone in Amico et al. (1986: 906). Un nuovo approccio allo studio della sistematica del genere Cystoseira C. Agardh (Phaeophyta, Fucales). Bollettino dell’Accademia Gioenia di Scienze Naturali di Catania, 18(326): 887–988.

Note: in absence of molecular evidences, we here consider G. barbata f. aurantia from Mediterranean as a distinct taxon from C. barbata f. repens Zinova et Kalugina [= G. barbata f. repens (Zinova et Kalugina) Sadogurska] described for the Black Sea, due to its morphological characters rather different from those of Zinova et Kalugina’s taxon as described and illustrated by Sadogurska (2021: 301, Fig 3), particularly due to the presence of short primary axis in f. repens (not present in f. aurantia) and both lateral and ultimate branches in f. repens (neither lateral nor ultimate branches distinguishable in f. aurantia) (see Sadogurska, 2021: 301, Fig 3a and Cormaci et al. 2012 tav 93 fig 1, respectively).