The families of the order Rhodymeniales (Rhodophyta): a molecular-systematic investigation with a description of Faucheaceae fam. nov.

Chamaebotrys erectus sp. nov. (Rhodymeniales, Rhodophyta) from the Socotra Archipelago, Yemen

“…In light of the recent molecular findings on the Rhodymeniales (Saunders et al 1999), the observation of a 4-celled carpogonial branch in Chamaebotrys erectus supports maintaining the genus (which was not sequenced by Saunders et al 1999) within the Rhodymeniaceae. The genus is unusual in the Rhodymeniaceae, however, in producing terminal tetrasporangia in nemathecia.…”

“…The genus is unusual in the Rhodymeniaceae, however, in producing terminal tetrasporangia in nemathecia. This has been hypothesised as a reversion to the ancestral condition by Saunders et al (1999). Further molecular studies may elucidate the phylogenetic placement of Chamaebotrys in relation to other Rhodymeniaceae.…”

First report of Halopeltis (Rhodophyta, Rhodymeniaceae) from the non-tropical Northern Hemisphere: H. adnata (Okamura) comb. nov. from Korea, and H. pellucida sp. nov. and H. willisii sp. nov. from the North Atlantic

“…However, R. adnata and its allies (vis., Halopeltis sp._1WA and H. willisii) resolved as sister to, rather than embedded among, the included species of Halopeltis in our phylogenies, which leaves open the possibility that these species actually belong to a sister genus of Halopeltis. Given their many shared morphological features, however, we consider the conservative taxonomic decision at this time calary cortical cells at the transition between inner and outer cortical layers (Saunders et al 1999, Saunders andMcDonald 2010). Sparling (1957, Fig.…”

“…These studies have discovered cryptic diversity within the order (e.g., Saunders et al 2006, Ballantine and LozadaTroche 2008, Schneider and Lane 2008, Saunders and McDonald 2010, as well as allowing for generic discovery and realignment in the Rhodymeniaceae, Fryeellaceae, Faucheaceae, Hymenocladiaceae, Champiaceae and Lomentariaceae (e.g., Millar et al 1996, Saunders et al 1999, 2006, Wilkes et al 2005, Dalen and Saunders 2007, Le Gall et al 2008, Saunders and McDonald 2010, Suzuki et al 2010. Combined, such molecular-assisted, alpha taxonomic (MAAT) studies have begun to demonstrate a significantly clearer picture of species richness and evolutionary relationships within this order than was known in the 20th century (Bliding 1928, Kylin 1931, 1956, Sparling 1957.…”

Mitochondrial and plastid genome analysis of the marine red alga Coeloseira compressa (Champiaceae, Rhodophyta)

“…Although phylogenetic studies of the Rhodymeniales based on gene sequences are published (Saunders et al 1999;Le Gall et al 2008), about 30% of the genera have yet to be analyzed. In addition, a plastid genome for the order has not been deciphered, and only one mitochondrial genome has been announced (Rhodymenia pseudopalmata (J.V.…”