Bibliographic Detail
Woelkerling, W.J., Millar, A.J.K., Harvey, A. & Baba, M., 2008
Reference:
Woelkerling, W.J., Millar, A.J.K., Harvey, A. & Baba, M. (2008). Recognition of Pachyarthron and Bossiella as distinct genera in the Corallinaceae, subfamily Corallinoideae (Corallinales, Rhodophyta). Phycologia 47: 265-293.
Abstract:
New evidence supports recognition of both Pachyarthron and Bossiella as distinct genera within the Corallinaceae,
subfamily Corallinoideae (Corallinales, Rhodophyta). Pachyarthron cretaceum, the type species of Pachyarthron, is
confirmed to occur in Australia, and a new study of the designated lectotype of P. cretacea and of plants from Australia,
Japan, Canada (British Columbia) and the United States (Alaska, Washington State) has shown that male conceptacles
are produced both axially at branch tips and laterally on intergenicula. By contrast, only lateral conceptacles occur in
Bossiella. Differences between Pachyarythron and Serraticardia & Marginisporum, the only genera of Corallinoideae
known to produce both axial and lateral conceptacles, are outlined, and a comparison of and key to all genera of
Corallinoideae are included. An emended generic description of Pachyarthron and an account of P. cretaceum are
provided. Brief accounts of four infraspecific taxa never transferred into Pachyarthron but attributed to the homotypic
synonym Amphiroa cretaceum also are included. These are Amphiroa cretacea f. breviarticulata (Areschoug) Yendo from
the Caribbean; A. cretacea f. capensis (Areschoug) Yendo from South Africa; A. cretacea f. rosariformis Yendo from
Japan; and A cretacea f. tasmanica (Sonder) Yendo from Australia. The biogeographic implications for Pachyarthron
and Bossiella are reviewed; Bossiella should be removed from the floras of Japan, Korea and China, whereas
Pachyarthron should be added.
