A novel clade of protistan parasites near the animal-fungal divergence.

Ragan, Mark A.; Goggin, C. L.; Rj, Cawthorn; Cerenius, Lage; Jamieson, Avc; Plourde, SM; Rand, TG; Söderhäll, Kenneth; Gutell, Robin R.

doi:10.1073/pnas.93.21.11907

Cited by 170 publications

(136 citation statements)

References 33 publications

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“…The areas of the wedges reflect the number of SSU rRNA sequences of these groups in GenBank. The DRIP lineage is a recently defined protistan clade near the animal-fungal divergences (30). This figure is based on nonparametric bootstrap analyses of MP, ME, and ML trees, Bayesian inferences, and the analysis of alternative likelihood topologies of the novel lineages with the KH likelihood test in the PAUP* package (see Table 1).…”

Section: Discussionmentioning

confidence: 99%

Novel kingdom-level eukaryotic diversity in anoxic environments

Dawson

Pace

2002

Proc. Natl. Acad. Sci. U.S.A.

297

291

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Molecular evolutionary studies of eukaryotes have relied on a sparse collection of gene sequences that do not represent the full range of eukaryotic diversity in nature. Anaerobic microbes, particularly, have had little representation in phylogenetic studies. Such organisms are the least known of eukaryotes and probably are the most phylogenetically diverse. To provide fresh perspective on the natural diversity of eukaryotes in anoxic environments and also to discover novel sequences for evolutionary studies, we conducted a cultivation-independent, molecular phylogenetic survey of three anoxic sediments, including both freshwater and marine samples. Many previously unrecognized eukaryotes were identified, including representatives of seven lineages that are not specifically related to any known organisms at the kingdom-level and branch below the eukaryotic ''crown'' radiation of animals, plants, fungi, stramenopiles, etc. The survey additionally identified new sequences characteristic of known ecologically important eukaryotic groups with anaerobic members. Phylogenetic analyses with the new sequences enhance our understanding of the diversity and pattern of eukaryotic evolution.

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Section: Discussionmentioning

confidence: 99%

Novel kingdom-level eukaryotic diversity in anoxic environments

Dawson

Pace

2002

Proc. Natl. Acad. Sci. U.S.A.

297

291

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“…Therefore, it was not surprising that nSSU rDNA analyses (Benny and O'Donnell, 2000;Ustinova et al, 2000) indicated that Amoebidium was located within the DRIP's clade (an acronym of the organisms included in this clade: Dermocystidium, rosette agent, Ichthyophonus, and Psorospermium), a recently proposed clade near the Animal-Fungi divergence (Ragan et al, 1996). The DRIP's clade was identified as a novel class Mesomycetozoea (Herr et al, 1999;Mendoza et al, 2002).…”

Section: The Amoebidiales and Eccrinales Are Not Fungimentioning

confidence: 99%

Evolutionary relationships among basal fungi (Chytridiomycota and Zygomycota): Insights from molecular phylogenetics

Tanabe

Watanabe

Sugiyama³

2005

J. Gen. Appl. Microbiol.

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Evolutionary relationships of the two basal fungal phyla Chytridiomycota and Zygomycota are reviewed in light of recent molecular phylogenetic investigation based on rDNA (nSSU, nLSU rDNA), entire mitochondrial genomes, and nuclear protein coding gene sequences (e.g., EF-1a a, RPB1). Accumulated molecular evidence strongly suggests that the two basal fungal phyla are not monophyletic. For example, the chytridiomycete order Blastocladiales appears to be closely related to the zygomycete order Entomophthorales. Within the Zygomycota, a monophyletic clade, consisting of the Dimargaritales, Harpellales, and Kickxellales, which is characterized by a shared unique septal ultrastructure, was identified. Moreover, evidence for the exclusion of zygomycete orders Amoebidiales and Eccrinales from the Fungi, and their placement at the Animal-Fungi boundary has been clearly documented. Microsporidia, a group of amitochondriate organisms currently under intensive study, is not supported as derived within the Fungi, but a fungal affinity cannot be ruled out. Taking these molecular phylogenetic studies into account, we proposed a hypothetical evolutionary framework of basal fungi.Key Words-Chytridiomycota; Fungi; Microsporidia; molecular phylogeny; nSSU rDNA; RPB1; Zygomycota J. Gen. Appl. Microbiol., 51, 267-276 (2005) Invited Review * Present address, and address reprint requests to: Dr. Junta Sugiyama, TechnoSuruga Co., Ltd. (formerly NCIMB Japan), Tokyo Office, Ogawamachi Kita Bldg. 4F, 1-8-3 Kanda Ogawamachi, Chiyoda-ku, Tokyo 101-0052, Japan. E-mail: jsugiyam@tecsrg.co.jp basal fungal phyla as suggested by accumulating molecular phylogenetic studies, especially emphasizing supra-ordinal relationships. Non-monophyletic nature of ChytridiomycotaCurrently, the Chytridiomycota contains five orders: the Blastocladiales, Chytridiales, Neocallimastigales, Monoblepharidales, and Spizellomycetales (Hawksworth et al., 1995). This classification scheme is based primarily on zoospore ultrastructure (Barr, 1990). Results of molecular phylogenetic analyses of rDNA sequences suggest that the Spizellomycetales, Neocallimastigales, and Monoblepharidales are monophyletic (James et al., 2000;Li and Heath, 1992), supporting the validity of the proposed chytrid higher-level taxonomy. The Chytridiales, however, appears to be polyphyletic as are some chytrid genera (e.g., Rhizophydium; James et al., 2000). rDNA analyses, however, have not resolved the interordinal relationships of the Chytridiomycota, which might be due to the lack of phylogenetic signal within rDNA sequences (James et al., 2000). Although taxon sampling has been limited, analysis of complete mitochondrial genome sequences has provided a clearer framework of chytridiomycete phylogeny. This analysis suggests that the Monoblepharidales branched earlier than a well-supported Chytridiales-Spizellomycetales lineage (Bullerwell et al., 2003a). In the mtDNA analysis, the phylogenetic position of the Blastocladiales is not statistically re- Barr (1980) a This classification sche...

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“…One example is Thelohania contejeani (Henneg, 1892), that has caused mass mortalities of crayfish in Europe (Alderman and Polglase, 1988;Dunn et al, 2009;Edgerton et al, 2002). Another known disease is psorospermiasis, caused by Psorospermium (Mesomycetozoea) that colonizes gills, hepatopancreas, antennal gland, connective and neural tissues, ovary membranes and cardiac and skeletal muscle (Hennton et al 1994;Ragan et al, 1996;Longshaw, 2011).…”

Section: Trophic Ecologymentioning

confidence: 99%

Red swamp crayfish: biology, ecology and invasion - an overview

et al. 2015

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-Alien species have been transported and traded by humans for many centuries. However, with the era of globalization, biological invasions have reached notable magnitudes. Currently, introduction of alien species is one of the major threats to biodiversity and ecosystem functioning. The North American crayfish Procambarus clarkii is one of the most widely introduced freshwater species in the world, especially due to its high economic importance. It is responsible for great modifications in invaded environments causing irreparable ecological and economic damages. Its impressive ability to successfully colonize a wide range of environments is a consequence of its behavioural and biological characteristics that can adapt to features of the invaded location, conferring to this species a notable ecological plasticity. This review summarizes the available information regarding P. clarkii's biology and invasive dynamics around the world in order to contribute to the understanding of the threats posed by its establishment, as well as to support management and impact mitigation efforts.

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A novel clade of protistan parasites near the animal-fungal divergence.

Cited by 170 publications

References 33 publications

Novel kingdom-level eukaryotic diversity in anoxic environments

Novel kingdom-level eukaryotic diversity in anoxic environments

Evolutionary relationships among basal fungi (Chytridiomycota and Zygomycota): Insights from molecular phylogenetics

Red swamp crayfish: biology, ecology and invasion - an overview

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