Morphological evolution and classification of the red algal order Ceramiales inferred using plastid phylogenomics

Abstract

The order Ceramiales contains about one third of red algal diversity and it was classically classified into four families according to morphology. The first phylogenies based on one or two molecular markers were poorly supported and failed to resolve these families as monophyletic. Nine families are currently recognized, but relationships within and among them are poorly understood. We produced a well-resolved phylogeny for the Ceramiales using plastid genomes for 80 (27 newly sequenced) representative species of the major lineages. Three of the previously recognized families were resolved as independent monophyletic lineages: Ceramiaceae, Wrangeliaceae and Rhodomelaceae. By contrast, our results indicated that the other six families require reclassification. We propose the new order Inkyuleeales, a new circumscription of the Callithamniaceae to include the Spyridiaceae, and a new concept of the Delesseriaceae that includes the Sarcomeniaceae and the Dasyaceae. We also investigated the evolution of the thallus structure, which has been important in the classical delineation of families. The ancestor of the Ceramiales was a monosiphonous filament that evolved into more complex morphologies several times independently during the evolutionary history of this hyperdiverse lineage.

The Dasya baillouviana and D. cryptica complexes (Delesseriaceae, Rhodophyta) in Bermuda with three additional new species from the archipelago

“…1). This phylogenetic tree was rooted with an outgroup of allied genera in the Delesseriaceae (D ıaz-Tapia et al 2019).…”

Divergence times and plastid phylogenomics within the intron‐rich order Erythropeltales (Compsopogonophyceae, Rhodophyta)

“…Extracted DNA of red algae was pooled with green algae DNA to reduce sequencing costs with a distinguishable alternate project organism (D ıaz-Tapia et al 2017(D ıaz-Tapia et al , 2019, and libraries were sequenced on the Illumina HiSeq platform by Novogene, with 150 bp paired-end reads. Plastid genomes were assembled and annotated as previously described (Preuss et al 2020).…”

Merging the cryptic genera Radicilingua and Calonitophyllum (Delesseriaceae, Rhodophyta): molecular phylogeny and taxonomic revision

“…A dataset of rbcL-5P sequences was created including the newly obtained sequences and other suitable sequences available in the INSDC repositories, following the most recent classifications for the focal taxa (Lin et al 2001, 2004a, 2004b, Lin and Fredericq 2003, Díaz-Tapia et al 2019. Representative sequences of the family Delesseriaceae were included, and in particular sequences of the subfamilies Nitophylloideae, Sarcomenioideae, Delesserioideae, and Phycodryoideae.…”