title: Timing of the evolutionary history of Corallinaceae (Corallinales, Rhodophyta).
abstract: The temporal dimension of the most recent Corallinaceae (order Corallinales) phylogeny was presented here, based on first occurrence time estimates from the fossil record. Calibration of the molecular clock of the genetic marker SSU entailed a separation of Corallinales from Hapalidiales in the Albian (Early Cretaceous ~105 mya). 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 mya). This 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 (~28-12 mya). The most common reef corallinaceans (Hydrolithon, Porolithon, Harveylithon, "Pneophyllum" conicum, and subclades within Lithophylloideae) appeared in this interval in the Indo-Australian Archipelago.
authors.affiliation: Departamento de Estratigrafía y Paleontología, Universidad de Granada, Campus Fuente Nueva, 18002, Granada, Spain.
authors.forename: Anja
authors.initials: A
authors.lastname: Rösler
authors.affiliation: Departamento de Genética, Universidad de Granada, Campus Fuente Nueva, 18002, Granada, Spain.
authors.forename: Francisco
authors.initials: F
authors.lastname: Perfectti
authors.affiliation: Grupo de investigación BIOCOST, Facultade de Ciencias, Universidade da Coruña, Campus de A Zapateira s/n, 15071, A Coruña, Spain.|Phycology Research Group, Ghent University, Krijgslaan 281, Building S8, 9000, Ghent, Belgium.|Equipe Exploration, Espèces et Evolution, Institut de Systématique, Evolution, Biodiversité, UMR 7205 ISYEB CNRS, MNHN, UPMC, EPHE, Muséum national d'Histoire naturelle (MNHN), Sorbonne Universités, 57 rue Cuvier CP 39, F-75005, Paris, France.
authors.forename: Viviana
authors.initials: V
authors.lastname: Peña
authors.affiliation: Departamento de Estratigrafía y Paleontología, Universidad de Granada, Campus Fuente Nueva, 18002, Granada, Spain.
authors.forename: Julio
authors.initials: J
authors.lastname: Aguirre
authors.affiliation: Departamento de Estratigrafía y Paleontología, Universidad de Granada, Campus Fuente Nueva, 18002, Granada, Spain.
authors.forename: Juan Carlos
authors.initials: JC
authors.lastname: Braga
mesh_terms: D020418:Algal Proteins / Q000235:genetics; D005075:Biological Evolution; D019143:Evolution, Molecular; D005580:Fossils; D010802:Phylogeny; D048030:RNA, Algal / Q000235:genetics; D000461:Rhodophyta / Q000145:classification / Q000235:genetics*
chemical_list: D020418:Algal Proteins; D048030:RNA, Algal
keywords: Corallinaceae; SSU marker; calibrated phylogenetic tree; fossil record; paleobiogeography