scholarly journals Molecular phylogeny and taxonomic revision of the genus Wittrockiella (Pithophoraceae, Cladophorales), including the descriptions of W. australis sp. nov. and W. zosterae sp. nov.

2017 ◽  
Vol 53 (3) ◽  
pp. 522-540 ◽  
Author(s):  
Christian Boedeker ◽  
Charles J. O'Kelly ◽  
John A. West ◽  
Takeaki Hanyuda ◽  
Adele Neale ◽  
...  
Keyword(s):  
Molecular Phylogeny ◽  
Taxonomic Revision

scholarly journals Taxonomic revision of the genus Zygorhizidium: Zygorhizidiales and Zygophlyctidales ord. nov. (Chytridiomycetes, Chytridiomycota)

2020 ◽  
Vol 5 (1) ◽  
pp. 17-38 ◽  
Author(s):  
K. Seto ◽  
S. Van Den Wyngaert ◽  
Y. Degawa ◽  
M. Kagami
Keyword(s):  
Molecular Phylogeny ◽  
Host Specificity ◽  
Type Species ◽  
Taxonomic Revision ◽  
The Other ◽  
Ultrastructural Observation ◽  
Resting Spore ◽  
Distinct Genus ◽  
Current Classification

During the last decade, the classification system of chytrids has dramatically changed based on zoospore ultrastructure and molecular phylogeny. In contrast to well-studied saprotrophic chytrids, most parasitic chytrids have thus far been only morphologically described by light microscopy, hence they hold great potential for filling some of the existing gaps in the current classification of chytrids. The genus Zygorhizidium is characterized by an operculate zoosporangium and a resting spore formed as a result of sexual reproduction in which a male thallus and female thallus fuse via a conjugation tube. All described species of Zygorhizidium are parasites of algae and their taxonomic positions remain to be resolved. Here, we examined morphology, zoospore ultrastructure, host specificity, and molecular phylogeny of seven cultures of Zygorhizidium spp. Based on thallus morphology and host specificity, one culture was identified as Z. willei parasitic on zygnematophycean green algae, whereas the others were identified as parasites of diatoms, Z. asterionellae on Asterionella, Z. melosirae on Aulacoseira, and Z. planktonicum on Ulnaria (formerly Synedra). According to phylogenetic analysis, Zygorhizidium was separated into two distinct order-level novel lineages; one lineage was composed singly of Z. willei, which is the type species of the genus, and the other included the three species of diatom parasites. Zoospore ultrastructural observation revealed that the two lineages can be distinguished from each other and both possess unique characters among the known orders within the Chytridiomycetes. Based on these results, we accommodate the three diatom parasites, Z. asterionellae, Z. melosirae, and Z. planktonicum in the distinct genus Zygophlyctis, and propose two new orders: Zygorhizidiales and Zygophlyctidales.

Taxonomic revision and molecular phylogeny of the fig wasp genusAnidarnesBouček, 1993 (Hymenoptera: Sycophaginae)

2013 ◽  
Vol 38 (1) ◽  
pp. 14-34 ◽  
Author(s):  
FERNANDO H. A. FARACHE ◽  
ASTRID CRUAUD ◽  
GWENAËLLE GENSON ◽  
RODRIGO A.S. PEREIRA ◽  
JEAN-YVES RASPLUS
Keyword(s):  
Molecular Phylogeny ◽  
Taxonomic Revision ◽  
Fig Wasp

scholarly journals Taxonomic revision and molecular phylogeny of Flemingia subgenus Rhynchosioides (Leguminosae)

2019 ◽  
Vol 64 (3) ◽  
pp. 253-271
Author(s):  
S.K. Gavade ◽  
S. Surveswaran ◽  
L.J.G. van der Maesen ◽  
M.M. Lekhak
Keyword(s):  
New Species ◽  
Molecular Phylogeny ◽  
Taxonomic Revision ◽  
Systematic Position ◽  
Morphological Evidence ◽  
Taxonomic Key ◽  
Molecular Information ◽  
A New Species

A taxonomic revision of Flemingia subg. Rhynchosioides based on morphology and molecular information (matK and ITS) is presented. The subgenus comprises six herbaceous taxa (F. gracilis, F. mukerjeeana, F. nilgheriensis, F. rollae, F. tuberosa and F. vestita). All species except F. vestita are endemic to India. Morphological evidence and molecular phylogeny revealed that the subgenus is monophyletic. Nevertheless, the systematic position of F. tuberosa remains unclear on account of its unique ecology and inflorescence. A new species, F. mukerjeeana, is described and four binomials, namely F. gracilis, F. nilgheriensis, F. tuberosa and F. vestita have been lectotypified. Furthermore, all species have been described, illustrated and their ecology discussed. A taxonomic key including the recently described species from Thailand, F. sirindhorniae, is also provided for easy identification.

Taxonomic study of the fern genera Abrodictyum C.Presl and Trichomanes L. (Hymenophyllaceae, Polypodiidae) in the western Indian Ocean, and description of a new Abrodictyum species for Madagascar

Phytotaxa ◽  
2017 ◽  
Vol 327 (3) ◽  
pp. 201
Author(s):  
JEAN-YVES DUBUISSON ◽  
LUCIE BAURET ◽  
AURELIE GRALL ◽  
BRUNO SENTERRE ◽  
AHAMADA H. SAID ◽  
...  
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Molecular Phylogeny ◽  
Taxonomic Revision ◽  
Western Indian Ocean ◽  
Taxonomic Study ◽  
Field Observations ◽  
Diagnostic Characters ◽  
Morphological Investigations

Recent studies on both genera Abrodictyum and Trichomanes (Hymenophyllaceae) in western Indian Ocean (Madagascar and neighbouring islands) resolved many taxonomic problems and led to the identification of new species. We propose here to finalize the taxonomic revision of both genera for the region, by completing and combining an expanded rbcL molecular phylogeny with morphological investigations and field observations on all the recognized species. Our results confirm the distinction of the supposedly six species of Abrodictyum and three species of Trichomanes. They also reveal the polyphyly of the highly polymorphic A. meifolium. Additional investigations on A. meifolium suggest the existence of at least two distinct taxa: the true highly variable and widespread A. meifolium which is renamed A. parviflorum comb. nov. and the newly described A. cylindratum sp. nov. restricted to Madagascar. A key and updated descriptions (including new diagnostic characters for A. tamarisciforme) are provided for the seven Abrodictyum and three Trichomanes species present in the western Indian Ocean.

scholarly journals A taxonomic revision and molecular phylogeny of the eastern Palearctic species of the genera Schizomyia Kieffer and Asteralobia Kovalev (Diptera, Cecidomyiidae, Asphondyliini), with descriptions of five new species of Schizomyia from Japan

ZooKeys ◽  
2018 ◽  
Vol 808 ◽  
pp. 123-160 ◽  
Author(s):  
Ayman Khamis Elsayed ◽  
Junichi Yukawa ◽  
Makoto Tokuda
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Molecular Phylogeny ◽  
Type Species ◽  
Taxonomic Revision ◽  
Morphological Features ◽  
Molecular Phylogenetic Analysis ◽  
Taxonomic Treatment ◽  
Molecular Phylogenetic ◽  
Palearctic Species

The genus Asteralobia (Diptera, Cecidomyiidae, Asphondyliini, Schizomyiina) was erected by Kovalev (1964) based on the presence of constrictions on the cylindrical male flagellomeres. In the present study, we examine the morphological features of Asteralobia and Schizomyia and found that the male flagellomeres are constricted also in Schizomyiagaliorum, the type species of Schizomyia. Because no further characters clearly separating Asteralobia from Schizomyia were observed, we synonymize Asteralobia under Schizomyia. Molecular phylogenetic analysis strongly supports our taxonomic treatment. We describe five new species of Schizomyia from Japan, S.achyranthesae Elsayed & Tokuda, sp. n., S.diplocyclosae Elsayed & Tokuda, sp. n., S.castanopsisae Elsayed & Tokuda, sp. n., S.usubai Elsayed & Tokuda, sp. n., and S.paederiae Elsayed & Tokuda, sp. n., and redescribe three species, S.galiorum Kieffer, S.patriniae Shinji, and S.asteris Kovalev. A taxonomic key to the Japanese Schizomyia species is provided.

Pourouma bergii (Urticaceae), a new species from South America

Phytotaxa ◽  
2014 ◽  
Vol 173 (2) ◽  
pp. 168
Author(s):  
André Luiz Gaglioti ◽  
SERGIO ROMANIUC NETO
Keyword(s):  
New Species ◽  
South America ◽  
Molecular Phylogeny ◽  
Taxonomic Revision ◽  
Conservation Assessment ◽  
Data Deficient ◽  
A New Species

During the course of the taxonomic revision and molecular phylogeny of Pourouma, we encountered a new species from Peru and Ecuador. P. bergii Gaglioti & Romaniucis here described, illustrated and its morphological similarities to P. tomentosa subsp. persecta and P. petiolulata are discussed. A Conservation Assessment determines P. bergii to be Data Deficient (DD).

scholarly journals A molecular phylogeny of the genus Echinococcus inferred from complete mitochondrial genomes

Parasitology ◽  
2006 ◽  
Vol 134 (5) ◽  
pp. 713-722 ◽  
Author(s):  
M. NAKAO ◽  
D. P. McMANUS ◽  
P. M. SCHANTZ ◽  
P. S. CRAIG ◽  
A. ITO
Keyword(s):  
North America ◽  
Molecular Phylogeny ◽  
Phylogenetic Trees ◽  
Taxonomic Revision ◽  
Sensu Stricto ◽  
Amino Acid Sequences ◽  
Mitochondrial Genomes ◽  
Land Bridge ◽  
High Level ◽  
Complete Mitochondrial Genomes

SUMMARYTaxonomic revision by molecular phylogeny is needed to categorize members of the genus Echinococcus (Cestoda: Taeniidae). We have reconstructed the phylogenetic relationships of E. oligarthrus, E. vogeli, E. multilocularis, E. shiquicus, E. equinus, E. ortleppi, E. granulosus sensu stricto and 3 genotypes of E. granulosus sensu lato (G6, G7 and G8) from their complete mitochondrial genomes. Maximum likelihood and partitioned Bayesian analyses using concatenated data sets of nucleotide and amino acid sequences depicted phylogenetic trees with the same topology. The 3 E. granulosus genotypes corresponding to the camel, pig, and cervid strains were monophyletic, and their high level of genetic similarity supported taxonomic species unification of these genotypes into E. canadensis. Sister species relationships were confirmed between E. ortleppi and E. canadensis, and between E. multilocularis and E. shiquicus, regardless of the analytical approach employed. The basal positions of the phylogenetic tree were occupied by the neotropical endemic species, E. oligarthrus and E. vogeli, whose definitive hosts are derived from carnivores that immigrated from North America after the formation of the Panamanian land bridge. Host-parasite co-evolution comparisons suggest that the ancestral homeland of Echinococcus was North America or Asia, depending on whether the ancestral definitive hosts were canids or felids.

Molecular phylogeny of Acrobeloides and Cephalobus (Nematoda: Cephalobidae) reveals paraphyletic taxa and recurrent evolution of simple labial morphology

Nematology ◽  
2006 ◽  
Vol 8 (6) ◽  
pp. 819-836 ◽  
Author(s):  
Steven Nadler ◽  
Ashleigh Smythe
Keyword(s):  
Molecular Phylogeny ◽  
Large Subunit ◽  
Taxonomic Revision ◽  
Morphological Characters ◽  
Lateral Field ◽  
The Core ◽  
Morphological Taxonomy ◽  
Dominant Feature ◽  
The Family ◽  
Molecular Phylogenetic

AbstractMembers of the family Cephalobidae (Nematoda) are among the most common and morphologically striking soil nematodes. Many members of Cephalobidae have extensive lip elaborations called probolae, but two taxonomically problematic genera, Acrobeloides and Cephalobus, have simple, low probolae. We sequenced a portion of the nuclear large subunit ribosomal DNA for 33 cultures of Acrobeloides and Cephalobus. A phylogenetic analysis of these data, plus sequences representing other members of Cephalobina, revealed a core clade of 22 closely related taxa, but did not represent Acrobeloides and Cephalobus as monophyletic. The dominant feature used in morphological taxonomy of Cephalobidae, the lip region, was homoplastic according to the molecular phylogenetic hypothesis. Contrary to previous suggestions, taxa with simple probolae have arisen multiple times from taxa with complex probolae. Cultures were also examined for mode of reproduction (presumed parthenogenetic vs sexual) and three morphological characters commonly used in generic diagnoses: the shape of the corpus in profile; the number of lateral incisures; and the terminal extent of the lateral field. Most cultures, including all 22 members of the core clade, lacked males and were presumed to be parthenogenetic, but several independent origins of sexually reproducing taxa were found. Of the morphological characters, only the corpus shape was consistent with the molecular phylogeny, however, the utility of this character is also questioned. Many genera with complex probolae were also paraphyletic, including Nothacrobeles, Zeldia and Cervidellus, indicating the need for more comprehensive phylogenies and a broad taxonomic revision of the family.

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