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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Phylogenomics and Morphological Reconstruction of Arcellinida Testate Amoebae Highlight Diversity of Microbial Eukaryotes in the Neoproterozoic

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Lahr, Daniel J. G. [1] ; Kosakyan, Anush [1, 2] ; Lar, Enrique [3, 4] ; Mitchell, Edward A. D. [3, 5] ; Morais, Luana [6] ; Porfirio-Sousa, Alfredo L. [1] ; Ribeiro, Giulia M. [1] ; Tice, Alexander K. [7, 8] ; Panek, Tomas [7, 9] ; Kang, Seungho [7, 8] ; Brown, Matthew W. [7, 8]
Total Authors: 11
[1] Univ Sao Paulo, Inst Biosci, Dept Zool, Sao Paulo - Brazil
[2] Czech Acad Sci, Biol Ctr, Inst Parasitol, BraniSovska 1160-31, Ceske Budejovice 37005 - Czech Republic
[3] Univ Neuchatel, Lab Soil Biodivers, Rue Emile Argand 11, CH-2000 Neuchatel - Switzerland
[4] CSIC, Real Jardin Bot, Plaza Murillo 2, ES-28014 Madrid - Spain
[5] Bot Garden Neuchatel, Pertuis du Sault 58, CH-2000 Neuchatel - Switzerland
[6] Univ Sao Paulo, Inst Astron Geophys & Atmospher Sci, Dept Geophys, Sao Paulo - Brazil
[7] Mississippi State Univ, Dept Biol Sci, Starkville, MS 39759 - USA
[8] Mississippi State Univ, Inst Genom Biocomp & Biotechnol, Starkville, MS 39759 - USA
[9] Univ Ostrava, Fac Sci, Dept Biol & Ecol, Ostrava - Czech Republic
Total Affiliations: 9
Document type: Journal article
Source: Current Biology; v. 29, n. 6, p. 991+, MAR 18 2019.
Web of Science Citations: 3

Life was microbial for the majority of Earth's history, but as very few microbial lineages leave a fossil record, the Precambrian evolution of life remains shrouded in mystery. Shelled (testate) amoebae stand out as an exception with rich documented diversity in the Neoproterozoic as vase-shaped microfossils (VSMs). While there is general consensus that most of these can be attributed to the Arcellinida lineage in Amoebozoa, it is still unclear whether they can be used as key fossils for interpretation of early eukaryotic evolution. Here, we present a well-resolved phylogenomic reconstruction based on 250 genes, obtained using single-cell transcriptomic techniques from a representative selection of 19 Arcellinid testate amoeba taxa. The robust phylogenetic framework enables deeper interpretations of evolution in this lineage and demanded an updated classification of the group. Additionally, we performed reconstruction of ancestral morphologies, yielding hypothetical ancestors remarkably similar to existing Neoproterozoic VSMs. We demonstrate that major lineages of testate amoebae were already diversified before the Sturtian glaciation (720 mya), supporting the hypothesis that massive eukaryotic diversification took place in the early Neoproterozoic and congruent with the interpretation that VSM are arcellinid testate amoebae. (AU)

FAPESP's process: 15/02689-1 - Experiments on competitive exclusion
Grantee:Giulia Magri Ribeiro
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 13/04585-3 - Deciphering the major trends of molecular and morphological evolution in the Amoebozoa
Grantee:Daniel José Galafasse Lahr
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 13/25729-3 - Temporal morphological variation of natural and clonal testate amoeba (Arcella vulgaris and Arcella gibbosa) lineages
Grantee:Alfredo Leonardo Porfirio de Sousa
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 13/12852-1 - Taphonomy and systematics of Neoproterozoic vase shaped microfossils from Brazil and their paleoecological and phylogenetic significance
Grantee:Luana Pereira Costa de Morais Soares
Support type: Scholarships in Brazil - Doctorate