Bibliographic Detail
Yoon, H.S., Muller, K.M., Sheath, R.G., Ott, F.D. & Bhattacharya, D., 2006
Reference:
Yoon, H.S., Muller, K.M., Sheath, R.G., Ott, F.D. & Bhattacharya, D. (2006). Defining the major lineages of red algae (Rhodophyta). Journal of Phycology 42: 482-492.
Abstract:
Previous phylogenetic studies of the Rhodophyta
have provided a framework for understanding red
algal phylogeny, but there still exists the need for a
comprehensive analysis using a broad sampling of
taxa and sufficient phylogenetic information to
clearly define the major lineages. In this study, we
determined 48 sequences of the PSI P700 chl a
apoprotein A1 (psaA) and rbcL coding regions and
established a robust red algal phylogeny to identify
the major clades. The tree included most of the lineages
of the Bangiophyceae (25 genera, 48 taxa).
Seven well-supported lineages were identified with
this analysis with the Cyanidiales having the earliest
divergence and being distinct from the remaining
taxa; i.e. the Porphyridiales 13, Bangiales, Florideophyceae,
and Compsopogonales. We also analyzed
data sets with fewer taxa but using seven proteins
or the DNA sequence from nine genes to
resolve inter-clade relationships. Based on all of
these analyses, we propose that the Rhodophyta
contains two new subphyla, the Cyanidiophytina
with a single class, the Cyanidiophyceae, and the
Rhodophytina with six classes, the Bangiophyceae,
Compsopogonophyceae, Florideophyceae, Porphyridiophyceae
classis nov. (which contains Porphyridium,
Flintiella, and Erythrolobus), Rhodellophyceae,
and Stylonematophyceae classis nov.
(which contains Stylonema, Bangiopsis, Chroodactylon,
Chroothece, Purpureofilum, Rhodosorus, Rhodospora,
and Rufusia). We also describe a new
order, Rhodellales, and a new family, Rhodellaceae
(with Rhodella, Dixoniella, and Glaucosphaera).
