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Members of the genus Pachyarthron Manza (Corallinales, Rhodophyta) on the Pacific coasts of Russia

Selivanova O.N. and Zhigadlova G.G. 2010. Members of the genus Pachyarthron Manza (Corallinales, Rhodophyta) on the Pacific coasts of Russia. Phycologia 49: 384–389. DOI: 10.2216/09-92.1 Examination of Bossiella compressa Kloczcova from Kamchatka revealed the presence of axial conceptacles together with lateral ones in the spermatangial plants. As such, this taxon should be removed from the genus Bossiella P.C. Silva, which possesses only lateral conceptacles as delimited by Woelkerling and colleagues. Comparison of this species with B. cretacea (Postels & Ruprecht) H.W. Johansen now attributed to the genus Pachyarthron Manza confirmed that Schneider and Wynne were correct in transferring this species to the same genus and in proposing the name Pachyarthron compressum (Kloczcova) C.W. Schneider & M.J. Wynne. Although the decision by these authors was based strictly on nomenclatural grounds, we are now able to provide morphological evidence for their assignment of this species to Pachyarthron as taxonomically justified.