Phylogeny of dracunculoid nematodes (Chromadorea: Rhabditida: Spirurina: Dracunculoidea) from some Eurasian freshwater fishes

Zootaxa ◽  
2020 ◽  
Vol 4858 (4) ◽  
pp. 521-541
Author(s):  
SERGEY G. SOKOLOV ◽  
ALEXANDER P. KALMYKOV ◽  
SVETLANA V. MALYSHEVA
Keyword(s):  
Phylogenetic Analysis ◽  
Phylogenetic Relationship ◽  
Ribosomal Dna ◽  
Phylogenetic Relationships ◽  
Type Species ◽  
Freshwater Fishes ◽  
Ssu Rdna ◽  
Lsu Rdna ◽  
Rdna Sequences ◽  
The Family

Sets of small ribosomal DNA (SSU rDNA) and large ribosomal DNA (LSU rDNA) sequences were obtained for Philometroides moraveci Vismanis & Yunchis, 1994, Philometra kotlani (Molnár, 1969), Philometra rischta Skrjabin, 1923, Philometra cf. obturans (Prenant, 1886) (Philometridae), Sinoichthyonema amuri (Garkavi, 1972), Agrachanus scardinii (Molnár, 1966), Kalmanmolnaria intestinalis (Dogiel & Bychowsky, 1934) and Skrjabillanus tincae Shigin & Shigina, 1958 (Skrjabillanidae). Phylogenetic analysis of SSU rDNA data shows that dracunculoid nematodes are divided into two well-supported clades designated as Clade I and Clade II, respectively. Clade I includes the type species of the genus Philonema Kuitunen-Ekbaum, 1933, some species from the family Daniconematidae Moravec & Køie, 1987 and two subfamilies of skrjabillanids, Skrjabillaninae Shigin & Shigina, 1958 and Esocineminae Moravec, 2006. Clade II unites species from the families Dracunculidae Stiles, 1907, Micropleuridae Baylis & Daubney, 1926 and Philometridae Baylis & Daubney, 1926. Within the Philometridae, there are several well-supported groups of species, one of which unites freshwater Philometra spp. from the Palearctic cyprinids, identified as P. kotlani, P rischta, P. ovata (Zeder, 1803) and P. cyprinirutili (Creplin, 1825). However, the phylogenetic relationships of most philometrids are unresolved. An analysis of partial SSU and LSU rDNA sequences indicates that there is no direct phylogenetic relationship between Agrachanus Tikhomirova, 1971 (type species Skrjabillanus scardinii Molnár, 1966) and Skrjabillanus Shigin & Shigina, 1958 (type species Sk. tincae), which means that the genus Agrachanus can be resurrected. Our study confirms that Philonematinae Ivashkin, Sobolev & Khromova, 1971 should be elevated to the family rank. We formally establish the family Philonematidae Ivashkin, Sobolev & Khromova, 1971 stat. nov. We also suggest combining the superfamilies Dracunculoidea Stiles, 1907 and Camallanoidea Railliet & Henry, 1915 into the infraorder Camallanomorpha Roberts, Janovy & Nadler, 2013. 

Phylogenetic analysis of the superfamily Hemiuroidea (Platyhelminthes, Neodermata:Trematoda) based on partial 28S rDNA sequences

Parasitology ◽  
2018 ◽  
Vol 146 (5) ◽  
pp. 596-603 ◽  
Author(s):  
Sergey G. Sokolov ◽  
Dmitry M. Atopkin ◽  
Misako Urabe ◽  
Ilya I. Gordeev
Keyword(s):  
Phylogenetic Analysis ◽  
Phylogenetic Relationship ◽  
Phylogenetic Relationships ◽  
Sister Group ◽  
28S Rdna ◽  
Monophyletic Group ◽  
Rdna Sequences ◽  
The Family ◽  
Statistical Support ◽  
28S Rdna Sequences

AbstractIn the present paper, the phylogenetic relationships between genera, subfamilies and families of the Hemiuroidea are explored. Twelve new sequences of 28 rDNA and data taken from GenBank (NSBI) on 43 species affiliated to 34 genera were included in the analysis. Most of the hemiuroidean trematodes form two highly supported clades (A and B), which are sister groups to each other.Hemipera manterijoined withGonocercaspp. with moderate statistical support. This clade is basal relative to the clades A and B. Сlade A is polytomic and contains representatives of the families Accacoeliidae, Syncoeliidae, Didymozoidae, Hirudinellidae and Sclerodistomidae, and derogenid subfamilies Derogeninae and Halipeginae. At the same time, the Syncoeliidae, Hirudinellidae and Accacoeliidae form a well-supported monophyletic group. The phylogenetic relationship between Derogeninae and Halipeginae is poorly resolved. Сlade B unites the isoparorchiid, bunocotylid, lecithasterid and hemiurid trematodes. Our data re-establishes the family Bunocotylidae, which consists of two subfamilies, Opisthadeninae and Bunocotylinae, and theMachidatrema chilostoma+Hysterolecithoides frontilatusgroup. The Bunocotylidae is the sister group to the Hemiuridae + Lecithasteridae group and the Isoparorchiidae is a basal relative to the representatives of these three hemiuroid families.

Sequence characterization and phylogenetic analysis of the 5S ribosomal DNA in species of the family Batrachoididae

Genome ◽  
2010 ◽  
Vol 53 (9) ◽  
pp. 723-730 ◽  
Author(s):  
María Úbeda-Manzanaro ◽  
Manuel Alejandro Merlo ◽  
José Luis Palazón ◽  
Carmen Sarasquete ◽  
Laureana Rebordinos
Keyword(s):  
Phylogenetic Analysis ◽  
Ribosomal Dna ◽  
5S Rdna ◽  
Purifying Selection ◽  
The Other ◽  
Fish Family ◽  
Sequence Characterization ◽  
Rdna Sequences ◽  
The Family ◽  
Clear Differentiation

5S ribosomal DNA (rDNA) sequences were analyzed in four species belonging to different genera of the fish family Batrachoididae. Several 5S rDNA variants differing in their non-transcribed spacers (NTSs) were found and were grouped into two main types. Two species showed both types of 5S rDNA, whereas the other two species showed only one type. One type of NTS of Amphichthys cryptocentrus showed a high polymorphism due to several deletions and insertions, and phylogenetic analysis showed a between-species clustering of this type of NTS in Amphichthys cryptocentrus. These results suggest a clear differentiation in the model of 5S rDNA evolution of these four species of Batrachoididae, which appear to have been subject to processes of concerted evolution and birth-and-death evolution with purifying selection.

Monophyly of marsupial intraerythrocytic apicomplexan parasites from South America and Australia

Parasitology ◽  
2009 ◽  
Vol 137 (1) ◽  
pp. 37-43 ◽  
Author(s):  
SANTIAGO MERINO ◽  
JAVIER MARTÍNEZ ◽  
RODRIGO A. VÁSQUEZ ◽  
JAN ŠLAPETA
Keyword(s):  
South America ◽  
Common Ancestor ◽  
Phylogenetic Reconstruction ◽  
Ssu Rdna ◽  
Lsu Rdna ◽  
South American ◽  
Apicomplexan Parasites ◽  
Rdna Sequences ◽  
The Family ◽  
Petaurus Australis

SUMMARYIntraerythrocytic parasites (Apicomplexa: Sarcocystidae) of the South American mouse opossum (Thylamys elegans) from Chile, South America, and of the yellow-bellied glider (Petaurus australis) from Australia were found to be monophyletic using SSU rDNA and partial LSU rDNA sequences. Phylogenetic reconstruction placed both species within the family Sarcocystidae. These intraerythrocytic parasites of marsupials represent an as yet unnamed genus predicted to have bisporocystic oocysts and tetrazoic sporocysts, which is a characteristic feature of all members of the family Sarcocystidae. These results show that erythrocytic parasites share a common ancestor and suggest co-evolution with their vertebrate host.

scholarly journals New Data Define the Molecular Phylogeny and Taxonomy of Four Freshwater Suctorian Ciliates With Redefinition of Two Families Heliophryidae and Cyclophryidae (Ciliophora, Phyllopharyngea, Suctoria)

2021 ◽  
Vol 12 ◽  
Author(s):  
Mingzhen Ma ◽  
Yuqing Li ◽  
Qingxiang Yuan ◽  
Xuetong Zhao ◽  
Khaled A. S. Al-Rasheid ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Molecular Phylogeny ◽  
Phylogenetic Analyses ◽  
Ssu Rdna ◽  
Freshwater Lake ◽  
The Other ◽  
Sufficient Evidence ◽  
Rdna Sequences ◽  
The Family ◽  
Molecular Phylogenetic

Four suctorian ciliates, Cyclophrya magna Gönnert, 1935, Peridiscophrya florea (Kormos & Kormos, 1958) Dovgal, 2002, Heliophrya rotunda (Hentschel, 1916) Matthes, 1954 and Dendrosoma radians Ehrenberg, 1838, were collected from a freshwater lake in Ningbo, China. The morphological redescription and molecular phylogenetic analyses of these ciliates were investigated. Phylogenetic analyses inferred from SSU rDNA sequences show that all three suctorian orders, Endogenida, Evaginogenida, and Exogenida, are monophyletic and that the latter two clusters as sister clades. The newly sequenced P. florea forms sister branches with C. magna, while sequences of D. radians group with those from H. rotunda within Endogenida. The family Heliophryidae, which is comprised of only two genera, Heliophrya and Cyclophrya, was previously assigned to Evaginogenida. There is now sufficient evidence, however, that the type genus Heliophrya reproduces by endogenous budding, which corresponds to the definitive feature of Endogenida. In line with this and with the support of molecular phylogenetic analyses, we therefore transfer the family Heliophryidae with the type genus Heliophrya to Endogenida. The other genus, Cyclophrya, still remains in Evaginogenida because of its evaginative budding. Therefore, combined with morphological and phylogenetic analysis, Cyclophyidae are reactivated, and it belongs to Evaginogenida.

Amended description of the rarely reported bryophilous ascomycete Octospora svrcekii (Pyronemataceae) with notes on the phylogeny of the section Wrightoideae

Phytotaxa ◽  
2020 ◽  
Vol 475 (1) ◽  
pp. 1-17
Author(s):  
ZUZANA SOCHOROVÁ ◽  
NEVEN MATOČEC ◽  
IVANA KUŠAN ◽  
LUKÁŠ JANOŠÍK ◽  
JAN ECKSTEIN ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Molecular Analysis ◽  
Phylogenetic Relationships ◽  
Ssu Rdna ◽  
Monophyletic Group ◽  
Species Description ◽  
Lsu Rdna ◽  
The World ◽  
Rdna Loci ◽  
Dead Material

The bryophilous ascomycete Octospora svrcekii, belonging to the section Wrightoideae, has so far been reported from only three localities in the world. New collections from Albania, Austria, Croatia, France, Slovakia and Spain have enabled a better understanding of its variability, ecology, distribution and phylogenetic relationships with other taxa within the section Wrightoideae. Octospora svrcekii was always found associated with Cratoneuron filicinum growing in constantly humid habitats (brooks, rivers or waterfalls), on calcareous bedrock. A species description based on both living and dead material is provided and compared with previous observations. A phylogenetic analysis of the section Wrightoideae, performed using the EF1α, SSU rDNA and LSU rDNA loci, revealed that Octospora svrcekii forms a monophyletic group with O. wrightii, O. erzbergeri, O. hygrohypnophila and O. americana, all of which are characterised by subglobose to broadly ellipsoid ascospores ornamented with isolated warts, and infect mosses in the order Hypnales, inducing galls on their rhizoids. Based on the molecular analysis, O. orthotrichi and O. affinis, formerly also considered as members of the section Wrightoideae, do not belong to the group.

A phylogeny inferred from large-subunit (26S) ribosomal DNA sequences suggests that the family Dasypogonaceae is closely aligned with the Restionaceae allies

2002 ◽  
Vol 15 (6) ◽  
pp. 749 ◽  
Author(s):  
Ray Neyland
Keyword(s):  
Phylogenetic Analysis ◽  
Ribosomal Dna ◽  
Dna Sequences ◽  
Large Subunit ◽  
Monophyletic Group ◽  
26S Rdna ◽  
Rdna Sequences ◽  
Australian Family ◽  
The Family

The Dasypogonaceae is a small Australian family composed of four genera. Previous systematic studies have failed to place the Dasypogonaceae with confidence. The present phylogenetic analysis, inferred from large-subunit (26S) rDNA sequences, strongly suggests that the Dasypogonaceae form a monophyletic group with the taxa referred to as the Restionaceae allies (i.e. Anarthriaceae, Centrolepidaceae, Ecdeiocoleaceae).

scholarly journals Discovery of Novel Backusella (Backusellaceae, Mucorales) Isolated from Invertebrates and Toads in Cheongyang, Korea

2021 ◽  
Vol 7 (7) ◽  
pp. 513
Author(s):  
Thuong T.T. Nguyen ◽  
Kerstin Voigt ◽  
André Luiz Cabral Monteiro de Azevedo Santiago ◽  
Paul M. Kirk ◽  
Hyang-Burm Lee
Keyword(s):  
Ribosomal Dna ◽  
Sequence Data ◽  
Phylogenetic Analyses ◽  
Large Subunit ◽  
Morphological Characters ◽  
Fungal Species ◽  
Lsu Rdna ◽  
Rdna Sequences ◽  
The Family ◽  
Internal Transcribed Spacer Sequences

Three novel fungal species, Backusella chlamydospora sp. nov., B. koreana sp. nov., and B. thermophila sp. nov., as well as two new records, B. oblongielliptica and B. oblongispora, were found in Cheongyang, Korea, during an investigation of fungal species from invertebrates and toads. All species are described here using morphological characters and sequence data from internal transcribed spacer sequences of ribosomal DNA and large subunit of the ribosomal DNA. Backusella chlamydospora is different from other Backusella species by producing chlamydospores. Backusella koreana can be distinguished from other Backusella species by producing abundant yeast-like cells. Backusella thermophila is characterized by a variable (subglobose to oblong, applanate to oval, conical and ellipsoidal to pyriform) columellae and grows well at 37 °C. Multigene phylogenetic analyses of the combined ITS and LSU rDNA sequences data generated from maximum likelihood and MrBayes analyses indicate that B. chlamydospora, B. koreana, and B. thermophila form distinct lineages in the family Backusellaceae. Detailed descriptions, illustrations, phylogenetic tree, and taxonomic key to the Backusella species present in Korea are provided.

scholarly journals Tetraselmis jejuensis sp. nov. (Chlorodendrophyceae), a Euryhaline Microalga Found in Supralittoral Tide Pools at Jeju Island, Korea

Plants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1289
Author(s):  
Jun-Ho Hyung ◽  
Eun-Joo Kim ◽  
Seung-Joo Moon ◽  
Nam Seon Kang ◽  
Jaeyeon Park
Keyword(s):  
Phylogenetic Analysis ◽  
Small Subunit ◽  
Morphological Characterization ◽  
Close Packing ◽  
Ssu Rdna ◽  
Jeju Island ◽  
Rdna Sequences ◽  
The Family ◽  
Clonal Cultures ◽  
Family Based

We found the euryhaline microalga, Tetraselmis jejuensis sp. nov., which was adapted to supralittoral tide pools with salinities varying from 0.3–3.1%. Fifteen strains of T. jejuensis were isolated from Daejeong (DJ) and Yongduam (YO), and clonal cultures were established in the laboratory. Morphological characterization revealed that the cells have a compressed shape, four flagella emerging from a depression near the apex in two opposite pairs, a cup-shaped chloroplast containing one pyrenoid surrounded by starch, and eyespot regions not located near the flagellar base. T. jejuensis cells showed distinct characteristics compared to other Tetraselmis species. First, a regular subunit pattern with honeycomb-like structures was predominantly displayed on the surface in the middle of the cell body. Second, the pyrenoid was invaded by both cytoplasmic channels comprising electron-dense material separated from the cytoplasm, and two branches of small cytoplasmic channels (canaliculi) in various directions, which characterize the subgenus Tetrathele. Eyespot regions containing a large number of osmiophilic globules, packed closely together and arranged in subcircular close packing of diverse sizes, were dispersed throughout the chloroplast. In the phylogenetic analysis of small subunit (SSU) rDNA sequences, the 15 strains isolated from DJ and YO separated a newly branched clade in the Chlorodendrophyceae at the base of a clade comprising the T. carteriiformi/subcordiformis clade, T. chuii/suecica clade, and T. striata/convolutae clade. The strains in the diverging clade were considered to belong to the same species. The SSU rDNA sequences of the DJ and YO strains showed a maximum difference of 1.53% and 1.19% compared to Tetraselmis suecica (MK541745), the closest species of the family based on the phylogenetic analysis, respectively. Based on morphological, molecular, and physiological features, we suggest a new species in the genus Tetraselmis named Tetraselmis jejuensis, with the species name “jejuensis” referring to the collection site, Jeju Island, Korea.

Phylogenetic relationships in Neonectria species having Cylindrocarpon anamorphs inferred from mitochondrial ribosomal DNA sequences

2001 ◽  
Vol 79 (3) ◽  
pp. 334-340 ◽  
Author(s):  
Feky R Mantiri ◽  
Gary J Samuels ◽  
James E Rahe ◽  
Barry M Honda
Keyword(s):  
Phylogenetic Analysis ◽  
Dna Sequence ◽  
Ribosomal Dna ◽  
Dna Sequences ◽  
Phylogenetic Relationships ◽  
Sequence Divergence ◽  
Small Subunit ◽  
New Combinations ◽  
Rdna Sequences ◽  
Informal Groups

Mitochondrial small subunit (mtSSU) rDNA sequences elucidated phylogenetic relationships in Neonectria Wollenw. (anamorphs = Cylindrocarpon Wollenw.; Ascomycetes, Hypocreales). Twelve isolates representing seven species in five taxonomically informal groups of Neonectria were subjected to phylogenetic analysis. Fusarium inflexum R. Schneid. (teleomorph: Gibberella) and Nectria cinnabarina (Fr.) Fr. (= Nectria s.str.) were outgroups. All of the Neonectria species formed a strongly supported clade with respect to the outgroups, indicating a single ascomycete genus for the holomorphs of Cylindrocarpon. Within the Neonectria clade there were three well-supported subclades that only partially corresponded to phenotype-defined groups. DNA sequence divergence among the twelve Neonectria isolates, 2.3-7.4%, was sufficient to resolve them. The results suggest that the mtSSU rDNA region is appropriate for phylogenetic analysis of Neonectria and Cylindrocarpon. The following new combinations are proposed: Neonectria coronata, Neonectria discophora, Neonectria neomacrospora, Neonectria radicicola, Neonectria rugulosa, Neonectria veuillotiana.Key words: Ascomycetes, Hypocreales, Nectria, systematics, tree pathogens.

scholarly journals Phylogenetic relationships, based on SSU rDNA sequences, among the didelphic genera of the family Trichodoridae from Portugal

Nematology ◽  
2010 ◽  
Vol 12 (2) ◽  
pp. 171-180 ◽  
Author(s):  
Isabel M. Duarte ◽  
Maria Teresa M. de Almeida ◽  
Derek J.F. Brown ◽  
Isabel Marques ◽  
Roy Neilson ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Small Subunit ◽  
Ssu Rdna ◽  
Indigenous Populations ◽  
Molecular Analyses ◽  
Rdna Sequences ◽  
The Family ◽  
Northern Regions ◽  
First Time ◽  
Small Subunit Ribosomal Dna

Abstract A survey of virus vector trichodorid nematodes was carried out in the central and northern regions of Portugal. Morphobiometric identification showed the presence of trichodorid species previously reported from Portugal, except for Paratrichodorus porosus, which is reported for the first time in Continental Europe. Small subunit ribosomal DNA (SSU rDNA) sequences of ten different species occurring in Portugal were obtained and a phylogenetic analysis based on their alignment was performed to infer relationships among the different Portuguese trichodorid species and three non-indigenous populations (Nanidorus minor, P. allius and P. teres). The resulting phylogenetic tree is in agreement with the currently accepted classification for Trichodoridae, except for Nanidorus, which clusters together with Trichodorus species, while the genera Paratrichodorus and Trichodorus appear as two distinct groups. A better understanding of the generic groupings in the family Trichodoridae was found. Based on the new molecular analyses we herein accept Nanidorus as a valid genus.

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