Bangiomorpha pubescens n. gen., n. sp.: implications for the evolution of sex, multicellularity, and the Mesoproterozoic/Neoproterozoic radiation of eukaryotes

  title={Bangiomorpha pubescens n. gen., n. sp.: implications for the evolution of sex, multicellularity, and the Mesoproterozoic/Neoproterozoic radiation of eukaryotes},
  author={Nicholas J. Butterfield},
Abstract Multicellular filaments from the ca. 1200-Ma Hunting Formation (Somerset Island, arctic Canada) are identified as bangiacean red algae on the basis of diagnostic cell-division patterns. As the oldest taxonomically resolved eukaryote on record Bangiomorpha pubescens n. gen. n. sp. provides a key datum point for constraining protistan phylogeny. Combined with an increasingly resolved record of other Proterozoic eukaryotes, these fossils mark the onset of a major protistan radiation near… 

The Weng'an biota and the Ediacaran radiation of multicellular eukaryotes

Megasphaera is a multicellular eukaryote with evidence for cell-to-cell adhesion, a flexible membrane unconstrained by a rigid cell wall, spatial cellular differentiation, germ-soma separation, and programmed cell death.

Micropaleontology of the lower Mesoproterozoic Roper Group, Australia, and implications for early eukaryotic evolution

Roper fossils provide direct or inferential evidence for many basic features of eukaryotic biology, including a dynamic cytoskeleton and membrane system that enabled cells to change shape, life cycles that include resting cysts coated by decay-resistant biopolymers, reproduction by budding and binary division, osmotrophy, and simple multicellularity.

Morphodiversity, complexity and macroevolution: revealed by the megascopic life of the Palaeo-Neoproterozoic Vindhyan Supergroup, India

Abstract Evidence of past life found in the Vindhyan Supergroup exhibits extensive diversity and taxonomically unresolved morphological complexities indicating varied biological affinities, advanced

Organically-preserved multicellular eukaryote from the early Ediacaran Nyborg Formation, Arctic Norway

Unexpected organically-preserved fossils from mudrocks are described, that provide support for the presence of organisms with differentiated cells (potentially an epithelial layer) in the late Neoproterozoic.

A new monotypic family for the enigmatic crustose red alga Plagiospora gracilis

The monotypic Plagiosporaceae fam.

A molecular phylogenetic analysis of the Bangiales (Rhodophyta) and description of a new genus and species, Pseudobangia kaycoleia

Molecular analyses showed that neither Bangia nor Porphyra is monophyletic and both may encompass several genera, and a new genus and species is proposed within the Bangiales, Pseudobangia kaycoleia.

A vaucheriacean alga from the middle Neoproterozoic of Spitsbergen: implications for the evolution of Proterozoic eukaryotes and the Cambrian explosion

Abstract A morphologically diverse assemblage of organic-walled fossils from the middle Neoproterozoic Svanbergfjellet Formation, Spitsbergen, is identified as a monospecific assemblage representing

Speciation in red algae: members of the Ceramiales as model organisms.

An aspect of paternal gene flow is examined by determining fertilization success of female Neosiphonia harveyi (Ceramiales), which retains a morphological record of all successful and unsuccessful female gametes, suggesting that limited availability of sperm may be less significant in red algae than previously thought.

Precise age of Bangiomorpha pubescens dates the origin of eukaryotic photosynthesis

This work presents new Re-Os isotopic ages from sedimentary rocks that stratigraphically bracket the occurrence of B. pubescens in the Bylot Supergroup of Baffin Island and revise its first appearance to 1.25 Ga, younger than commonly held interpretations and permits more precise estimates of early eukaryotic evolution.



Palaeoconchocelis starmachii, a carbonate boring microfossil from the Upper Silurian of Poland (425 million years old): implications for the evolution of the Bangiaceae (Rhodophyta)

Abstract A 425 million-year-old organically preserved endolithic microfossil, Palaeoconchocelis starmachii Campbell, Kazmierczak, and Golubic (1979), from sedimentary strata of the Upper Silurian of

The origin of red algae: implications for plastid evolution.

  • J. StillerB. Hall
  • Biology
    Proceedings of the National Academy of Sciences of the United States of America
  • 1997
Phylogenetic analyses provide strong statistical support for an early evolutionary emergence of the Rhodophyta that preceded the origin of the line that led to plants, animals, and fungi, and argue for a reexamination of current models of plastid evolution.

Systematics of Bangia (Rhodophyta) in North America. I. Biogeographic trends in morphology

Growth in culture under controlled or varied conditions resulted in a similar trend of basin-based differences in filament diameters for asexual germlings, mature asexual pla...

A gene phylogeny of the red algae (Rhodophyta) based on plastid rbcL.

A phylogeny for the Rhodophyta has been inferred by parsimony analysis of plastid rbcL sequences representing 81 species, 68 genera, 38 families, and 17 orders of red algae; rbcL encodes the large

Permineralized Fossils from the Terminal Proterozoic Doushantuo Formation, South China

Permineralized fossils of the terminal Proterozoic (600–550 Ma) Doushantuo Formation, China, provide an unusually clear window on biological diversity just before the Ediacaran radiation. In the

Testate amoebae in the Neoproterozoic Era: evidence from vase-shaped microfossils in the Chuar Group, Grand Canyon

Abstract Vase-shaped microfossils (VSMs) occur globally in Neoproterozoic rocks, but until now their biological relationships have remained problematic. Exceptionally preserved new populations from


Two isolates of the red alga Bangiafuscopurpurea have been cultured for over 3 years. The diplobiontic life history consists of morphologically dissimilar generations, the Bangiaand

Paleobiology of distinctive benthic microfossils from the upper Proterozoic Limestone-Dolomite "Series," central East Greenland.

This distinctive population of Polybessurus bipartitus, along with co-occurring filamentous cyanobacteria and other microfossils, contributes to an increasingly refined picture of ecological heterogeneity in late Proterozoic oceans.

Diverse organic-walled fossils, including “possible dinoflagellates,” from the early Neoproterozoic of arctic Canada

Recognition of 13 new acritarchs, based on novel ornamentation, excystment structures, and/or wall structure, substantially increases their known diversity for this interval and points to a severe undersampling of the Proterozoic fossil record.