Devescovinid trichomonad with axostyle-based rotary motor (“Rubberneckia”): Taxonomic assignment as Caduceia versatilis sp. nov.

D'Ambrosio, Ugo; Dolan, Michael F.; Wier, Andrew M.; Margulis, Lynn

doi:10.1016/s0932-4739(99)80011-x

Cited by 23 publications

(10 citation statements)

References 14 publications

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“…X97974) cluster together and the Caduceia sequence belongs to a strongly supported group (BPP/BV of 100%/69%) composed of four other Devescovina sequences. This grouping corroborates the marked morphological similarity observed between these two genera (Brugerolle 1976; Brugerolle and Lee 2001; D'Ambrosio et al 1999; Grassé 1952; Kirby 1941, 1942). Indeed, for a long time, several authors including Duboscq and Grassé (1927) believed Caduceia França, 1918, to be a synonym of Devescovina before Grassé himself (1937) retained Caduceia as a valid genus.…”

supporting

confidence: 89%

Molecular Phylogenetic Position of the Genera Stephanonympha and Caduceia (Parabasalia) Inferred from Nuclear Small Subunit rRNA Gene Sequences

Noël

Noda

Mantini

et al. 2007

J Eukaryotic Microbiology

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Nuclear small subunit (SSU) rRNA gene sequences were obtained by polymerase chain reaction from trichomonad symbionts of termites that belong to the Devescovinidae (Caduceia versatilis) and polymastigont Calonymphidae (Stephanonympha nelumbium). The unidentified SSU rRNA sequence Nk3, previously obtained from the termite Neotermes koshunensis, has also been shown to derive from a Stephanonympha sp. by in situ hybridization. These sequences were analysed in a broad phylogeny including nearly all identified parabasalid sequences available in the databases, and some as yet unidentified sequences likely deriving from the new order Cristamonadida (Devescovinidae, Calonymphidae, and hypermastigids Lophomonadida). A global phylogeny of parabasalids reveals a partial agreement between the clades identified in this work and the last classification of this phylum into four orders. However, this classification is still incongruent with our data and new taxonomic considerations are proposed. The analysis confirms the monophyly of the Cristamonadida and separates this order into two groups: the first unites nearly all the Devescovinidae including Caduceia and the Calonymphidae Coronympha and Metacoronympha, whereas the second group is composed of a few Devescovinidae, Lophomonadida, and Calonymphidae such as Stephanonympha. Caduceia is closely related to Devescovina, corroborating the marked morphological similarity between these two genera whereas Stephanonympha groups together with the Calonymphidae Snyderella and Calonympha. These data also confirm the polyphyly of the families Devescovinidae and Calonymphidae and support the arrangement of the axostyle-pelta complexes as a valuable character for taxonomic considerations within the Calonymphidae.

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supporting

confidence: 89%

Molecular Phylogenetic Position of the Genera Stephanonympha and Caduceia (Parabasalia) Inferred from Nuclear Small Subunit rRNA Gene Sequences

Noël

Noda

Mantini

et al. 2007

J Eukaryotic Microbiology

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“…[ 41 , 61 ]; the other symbionts in these three protist families were short rods [ 39 , 41 , 62 - 64 ]. Filamentous ectosymbionts with similar association occur in Devescovina [ 41 , 65 ], Caduceia [ 45 , 66 ], and Streblomastix [ 41 , 67 ]. Therefore, these filamentous forms have arisen independently.…”

Section: Resultsmentioning

confidence: 99%

Complex coevolutionary history of symbiotic Bacteroidales bacteria of various protists in the gut of termites

et al. 2009

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Background: The microbial community in the gut of termites is responsible for the efficient decomposition of recalcitrant lignocellulose. Prominent features of this community are its complexity and the associations of prokaryotes with the cells of cellulolytic flagellated protists. Bacteria in the order Bacteroidales are involved in associations with a wide variety of gut protist species as either intracellular endosymbionts or surface-attached ectosymbionts. In particular, ectosymbionts exhibit distinct morphological patterns of the associations. Therefore, these Bacteroidales symbionts provide an opportunity to investigate not only the coevolutionary relationships with the host protists and their morphological evolution but also how symbiotic associations between prokaryotes and eukaryotes occur and evolve within a complex symbiotic community.

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“…As morphological features that allow a separation of Devescovina species and Caduceia species (Duboscq and Grassé, 1927; Kirby, 1941; 1942) are weak, Kirby used the presence of filamentous ectosymbiotic rods as an important characteristic separating species in the genus Devescovina from those in all other devescovinid genera (including Caduceia ). Notably, the devescovinid flagellate ‘Rubberneckia’ discovered by Tamm and Tamm (1974) was later described as a species of Caduceia ( versatilis ) by D'Ambrosio and colleagues (1999) even though it possesses filamentous rods similar to those present on Devescovina species (Tamm, 1982). The phylogenetic position of other Caduceia species must be studied in order to resolve this issue.…”

Section: Discussionmentioning

confidence: 99%

Strict cospeciation of devescovinid flagellates and Bacteroidales ectosymbionts in the gut of dry‐wood termites (Kalotermitidae)

Desai

Strassert

Meuser

et al. 2010

Environmental Microbiology

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SummaryThe surface of many termite gut flagellates is colonized with a dense layer of bacteria, yet little is known about the evolutionary relationships of such ectosymbionts and their hosts. Here we investigated the molecular phylogenies of devescovinid flagellates (Devescovina spp.) and their symbionts from a wide range of dry-wood termites (Kalotermitidae). From species-pure flagellate suspensions isolated with micropipettes, we obtained SSU rRNA gene sequences of symbionts and host. Phylogenetic analysis showed that the Devescovina spp. present in many species of Kalotermitidae form a monophyletic group, which includes also the unique devescovinid flagellate Caduceia versatilis. All members of this group were consistently associated with a distinct lineage of Bacteroidales, whose location on the cell surface was confirmed by fluorescence in situ hybridization. The well-supported congruence of the phylogenies of devescovinids and their ectosymbionts documents a strict cospeciation. In contrast, the endosymbionts of the same flagellates ('Endomicrobia') were clearly polyphyletic and must have been acquired independently by horizontal transfer from other flagellate lineages. Also the Bacteroidales ectosymbionts of Oxymonas flagellates present in several Kalotermitidae belonged to several distantly related lines of descent, underscoring the general perception that the evolutionary history of flagellate-bacteria symbioses in the termite gut is complex.

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Devescovinid trichomonad with axostyle-based rotary motor (“Rubberneckia”): Taxonomic assignment as Caduceia versatilis sp. nov.

Cited by 23 publications

References 14 publications

Molecular Phylogenetic Position of the Genera Stephanonympha and Caduceia (Parabasalia) Inferred from Nuclear Small Subunit rRNA Gene Sequences

Molecular Phylogenetic Position of the Genera Stephanonympha and Caduceia (Parabasalia) Inferred from Nuclear Small Subunit rRNA Gene Sequences

Complex coevolutionary history of symbiotic Bacteroidales bacteria of various protists in the gut of termites

Strict cospeciation of devescovinid flagellates and Bacteroidales ectosymbionts in the gut of dry‐wood termites (Kalotermitidae)

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