Our paper about the dated phylogeny of the red algae Corallinaceae (Corallinales, Rodophita) is now on-line at Journal of Phycology.
A chronogram for the recently published Corallinaceae phylogeny, based on first-occurrence-time estimates from the fossil record, is presented in this paper. The calibration of the molecular clock of the genetic marker SSU entailed a separation of Corallinales from Hapalidiales in the Albian (Early Cretaceous, ~ 105 Ma). Neither the calibration nor the fossil record resolved the succession of appearance of the first three emerging subfamilies: Mastophoroideae, Corallinoideae, and Neogoniolithoideae. The development of the tetra/bisporangial conceptacle roofs by filaments surrounding and interspersed among the sporangial initials was an evolutionary novelty emerging at the Cretaceous-Paleogene boundary (~ 66 Ma). This evolutionary novelty was shared by the subfamilies Hydrolithoideae, Metagoniolithoideae, and Lithophylloideae, which diverged in the early Paleogene. Subclades within the Metagoniolithoideae and Lithophylloideae diversified in the late Oligocene-middle Miocene (~ 28 to 12 Ma). The most common reef corallinaceans (Hydrolithon, Porolithon, Harveylithon, “Pneophyllum” conicum, and subclades within Lithophylloideae) appeared in this interval in the Indo-Australian Archipelago.
This is a paper derived from Anja Rösler’s PhD Thesis
Rösler, A., Perfectti, F., Peña, V., Aguirre, J. and Braga, J. C. (2017). Timing of the evolutionary history of Corallinaceae (Corallinales, Rhodophyta). J. Phycol. Accepted Manuscript. doi:10.1111/jpy.12520