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Your search keyword '"Rösler, Anja"' showing total 3 results
Start Over Author "Rösler, Anja" Topic phylogeny
3 results on '"Rösler, Anja"'

1. Phylogenetic relationships of corallinaceae (Corallinales, Rhodophyta): taxonomic implications for reef-building corallines.

Author

Rösler A, Perfectti F, Peña V, and Braga JC

Subjects
Algal Proteins genetics, Algal Proteins metabolism, Coral Reefs, RNA, Algal genetics, RNA, Algal metabolism, Rhodophyta genetics, Sequence Analysis, DNA, Phylogeny, Rhodophyta classification
Abstract

A new, more complete, five-marker (SSU, LSU, psbA, COI, 23S) molecular phylogeny of the family Corallinaceae, order Corallinales, shows a paraphyletic grouping of seven well-supported monophyletic clades. The taxonomic implications included the amendment of two subfamilies, Neogoniolithoideae and Metagoniolithoideae, and the rejection of Porolithoideae as an independent subfamily. Metagoniolithoideae contained Harveylithon gen. nov., with H. rupestre comb. nov. as the generitype, and H. canariense stat. nov., H. munitum comb. nov., and H. samoënse comb. nov. Spongites and Pneophyllum belonged to separate clades. The subfamily Neogoniolithoideae included the generitype of Spongites, S. fruticulosus, for which an epitype was designated. Pneophyllum requires reassesment. The generitype of Hydrolithon, H. reinboldii, was a younger heterotypic synonym of H. boergesenii. The evolutionary novelty of the subfamilies Hydrolithoideae, Metagoniolithoideae, and Lithophylloideae was the development of tetra/bisporangial conceptacle roofs by filaments surrounding and interspersed among the sporangial initials., (© 2016 Phycological Society of America.)

Published
2016
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2. Adeylithon bosencei gen. et sp. nov. (Corallinales, Rhodophyta): a new reef-building genus with anatomical affinities with the fossil Aethesolithon

Author

Peña, viviana, Le Gall, Line, Rösler, Anja, Payri, Claude, Braga, Juan Carlos, Gabrielson, P., Universidade da Coruña, Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Caractérisation et modélisation des échanges dans des lagons soumis aux influences terrigènes et anthropiques (CAMELIA), Institut de Recherche pour le Développement (IRD [Nouvelle-Calédonie])-Institut de Recherche pour le Développement (IRD [Guyane]), and Universidad de Granada (UGR)

Subjects
0106 biological sciences, Systematics, Subfamily, [SDV]Life Sciences [q-bio], Plant Science, [SDV.BID]Life Sciences [q-bio]/Biodiversity, Aquatic Science, phylogeny, 010603 evolutionary biology, 01 natural sciences, taxonomy, Paleontology, distribution, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, 14. Life underwater, systematics, Reef, Phylogeny, ComputingMilieux_MISCELLANEOUS, Corallinaceae, fossil coralline algae, geography, geography.geographical_feature_category, Conceptacle, biology, Coral Reefs, Fossils, 010604 marine biology & hydrobiology, Australia, paleobiogeography, Coral reef, biology.organism_classification, Pacific, Thallus, Rhodophyta, Taxonomy (biology), coral reefs, Hydrolithoideae
Abstract

Adeylithon gen. nov. with one species, A. bosencei sp. nov., belonging to the subfamily Hydrolithoideae is described from Pacific coral reefs based on psbA sequences and morpho-anatomy. In contrast with Hydrolithon, A. bosencei showed layers of large polygonal "cells," which resulted from extensive lateral fusions of perithallial cells, interspersed among layers of vegetative cells. This anatomical feature is shared with the fossil Aethesolithon, but lacking DNA sequences from the fossils and the fragmentary nature of Aethesolithon type material, we cannot ascertain if Adeylithon and Aethesolithon are congeneric. Morpho-anatomical features of A. bosencei were generally congruent with diagnostic features of the subfamily Hydrolithoideae: (i) outline of cell filaments entirely lost in large portions due to pervasive and extensive cell fusions, (ii) trichocytes not arranged in tightly packed horizontal fields, (iii) basal layer without palisade cells, and (iv) cells lining the canal pore oriented more or less perpendicular to roof surface and not protruding into the canal. However, it showed a predominant monomerous thallus organization and trichocytes were disposed in large pustulate, horizontal fields, although they were not tightly packed and did not become distinctly buried in the thallus. Only mature tetrasporangial conceptacles were observed, therefore the type of conceptacle roof formation remained undetermined. Adeylithon bosencei occurs on shallow coral reefs, in Australia, Papua New Guinea, and South Pacific islands (Fiji, Vanuatu). Fossil Aethesolithon is considered an important component of shallow coral reefs since the Miocene; fossil records showed a broad Indo-Pacific distribution, but a long-term process of range contraction in the last 2.6 million years, resulting in an overlap with the distribution of the extant Adeylithon. While the congeneric nature of extant and fossil taxa remained uncertain, similarities in morpho-anatomy, habitat, and distribution may indicate that both taxa likely shared a common ancestor.

Published
2019

3. TIMING OF THE EVOLUTIONARY HISTORY OF CORALLINACEAE (CORALLINALES, RHODOPHYTA).

Author

Rösler, Anja, Perfectti, Francisco, Peña, Viviana, Aguirre, Julio, Braga, Juan Carlos, and Gabrielson, P.

Subjects
*CORALLINE algae, *PHYLOGENY, *MOLECULAR clock, *GENETIC markers, *REEF ecology
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. [ABSTRACT FROM AUTHOR]

Published
2017
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