Inferences about orthopteroid phylogeny and molecular evolution from small subunit nuclear ribosomal DNA sequences

AbstractThe systematic position of Campydora Cobb, 1920, which possesses many unique morphological features, especially in pharyngeal structure and stomatal armature, has long been a matter of uncertainty with the 'position of the Campydorinae' (containing only Campydora) being questionable. A review of the morphology of C. demonstrans, the only nominal species of Campydora concluded that the species warranted placement as the sole member of a monotypic suborder, Campydorina, in the order Dorylaimida. Others placed Campydorina in the order Enoplida. We conducted phylogenetic analyses, using 18s small subunit ribosomal DNA sequences generated from a number of taxa in the subclasses Enoplia and Dorylaimia, to evaluate these competing hypotheses. Although precise taxonomic placement of the genus Campydora and the identity of its closest living relatives is in need of further investigation, our analyses, under maximum parsimony, distance, and maximum likelihood criteria, unambiguously indicate that Campydora shares a common, more recent, ancestry with genera such as Alaimus, Pontonema, Tripyla and Ironus (Enoplida), rather than with any members of Dorylaimida, Mononchida or Triplonchida.

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Intragenomic diversity and phylogenetic systematics of wild rosemaries (Rosmarinus officinalis L. s.l., Lamiaceae) assessed by nuclear ribosomal DNA sequences (ITS)

Plant Systematics and Evolution ◽

10.1007/s00606-006-0454-5 ◽

2006 ◽

Vol 262 (1-2) ◽

pp. 1-12 ◽

Cited By ~ 20

Author(s):

J. A. Rosselló ◽

R. Cosín ◽

M. Boscaiu ◽

O. Vicente ◽

I. Martínez ◽

...

Keyword(s):

Ribosomal Dna ◽

Dna Sequences ◽

Rosmarinus Officinalis ◽

Nuclear Ribosomal Dna ◽

Phylogenetic Systematics ◽

Rosmarinus Officinalis L

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Morphology, genetic characterization and molecular phylogeny of pinworm Skrjabinema longicaudatum n. sp. (Oxyurida: Oxyuridae) from the endangered Tibetan antelope Pantholops hodgsonii (Abel) (Artiodactyla: Bovidae)

Parasites & Vectors ◽

10.1186/s13071-020-04430-6 ◽

2020 ◽

Vol 13 (1) ◽

Author(s):

Yi-Fan Cao ◽

Hui-Xia Chen ◽

Yang Li ◽

Dang-Wei Zhou ◽

Shi-Long Chen ◽

...

Keyword(s):

New Species ◽

Ribosomal Dna ◽

Dna Sequences ◽

Sequence Data ◽

Phylogenetic Analyses ◽

Large Subunit ◽

Small Subunit ◽

Sister Relationship ◽

Tibetan Antelope ◽

A New Species

Abstract Background The Tibetan antelope Pantholops hodgsonii (Abel) (Artiodactyla: Bovidae) is an endangered species of mammal endemic to the Qinghai-Tibetan Plateau. Parasites and parasitic diseases are considered to be important threats in the conservation of the Tibetan antelope. However, our present knowledge of the composition of the parasites of the Tibetan antelope remains limited. Methods Large numbers of nematode parasites were collected from a dead Tibetan antelope. The morphology of these nematode specimens was observed using light and scanning electron microscopy. The nuclear and mitochondrial DNA sequences, i.e. small subunit ribosomal DNA (18S), large subunit ribosomal DNA (28S), internal transcribed spacer (ITS) and cytochrome c oxidase subunit 1 (cox1), were amplified and sequenced for molecular identification. Moreover, phylogenetic analyses were performed using maximum likelihood (ML) inference based on 28S and 18S + 28S + cox1 sequence data, respectively, in order to clarify the systematic status of these nematodes. Results Integrated morphological and genetic evidence reveals these nematode specimens to be a new species of pinworm Skrjabinema longicaudatum (Oxyurida: Oxyuridae). There was no intraspecific nucleotide variation between different individuals of S. longicaudatum n. sp. in the partial 18S, 28S, ITS and cox1 sequences. However, a high level of nucleotide divergence was revealed between the new species and its congeners in 28S (8.36%) and ITS (20.3–23.7%) regions, respectively. Molecular phylogenetic results suggest that the genus Skrjabinema should belong to the subfamily Oxyurinae (Oxyuroidea: Oxyuridae), instead of the subfamily Syphaciidae or Skrjabinemiinae in the traditional classification, as it formed a sister relationship to the genus Oxyuris. Conclusions A new species of pinworm Skrjabinema longicaudatum n. sp. (Oxyurida: Oxyuridae) is described. Skrjabinema longicaudatum n. sp. represents the first species of Oxyurida (pinworm) and the fourth nematode species reported from the Tibetan antelope. Our results contribute to the knowledge of the species diversity of parasites from the Tibetan antelope, and clarify the systematic position of the genus Skrjabinema.

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Phylogeny of the Genus Omphalotus Based on Nuclear Ribosomal DNA-Sequences

Mycologia ◽

10.2307/3762142 ◽

2004 ◽

Vol 96 (6) ◽

pp. 1253 ◽

Cited By ~ 3

Author(s):

Martin Kirchmair ◽

Sandra Morandell ◽

Daniela Stolz ◽

Reinhold Poder ◽

Christian Sturmbauer

Keyword(s):

Ribosomal Dna ◽

Dna Sequences ◽

Nuclear Ribosomal Dna

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Towards a new classification of tribe Stachydeae (Lamiaceae): naming clades using molecular evidence

Botanical Journal of the Linnean Society ◽

10.1093/botlinnean/boz021 ◽

2019 ◽

Vol 190 (4) ◽

pp. 345-358 ◽

Cited By ~ 4

Author(s):

Yasaman Salmaki ◽

Günther Heubl ◽

Maximilian Weigend

Keyword(s):

Ribosomal Dna ◽

Dna Sequences ◽

Phylogenetic Relationships ◽

Nuclear Ribosomal Dna ◽

Molecular Evidence ◽

New Classification ◽

Formal Classification ◽

Phylogenetic Nomenclature

AbstractStachydeae, comprising c. 470 species, are one of the most diverse and taxonomically puzzling groups in Lamioideae. In the present study, the phylogenetic relationships in the Eurystachys clade (a phylogenetic name for all genera attributed to Stachydeae except Melittis) were reconstructed utilizing nuclear ribosomal DNA sequences (nrETS, 5S-NTS) from 148 accessions in 12 genera. Our phylogenetic results recovered Stachys as paraphyletic with numerous traditionally recognized genera nested in it. A broadly defined Eurystachys clade, however, was monophyletic. Unlike previous studies, the present study was able to resolve the group into 12 well-supported clades, named here as (1) Eriostomum, (2) Stachys, (3) Prasium, (4) Setifolia, (5) Distantes, (6) Burgsdorfia, (7) Hesiodia, (8) Empedoclia, (9) Sideritis, (10) Marrubiastrum, (11) Swainsoniana and (12) Olisia. These 12 clades were formally named in a phylogenetic nomenclature for the Eurystachys clade. Several infrageneric units were retrieved as monophyletic, namely Sideritis sections Burgsdorfia, Empedoclia and Hesiodia, Sideritis subgenus Marrubiastrum and Stachys sections Eriostomum (including Stachys section Mucronata) and Setifolia. The findings of this study also provide the basis for a future formal classification, with two options: (1) splitting of the Eurystachys clade into 12 monophyletic genera, all of them based on pre-existing genus names and redefined to encompass additional taxa, but without clear morphological apomorphies; or (2) lumping of all segregates into a broadly defined Stachys, including widely recognized and well-defined segregates such as Prasium and Sideritis.

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Molecular Evolution of the Small Subunit Ribosomal DNA in Woodlice (Crustacea, Isopoda, Oniscidea) and Implications for Oniscidean Phylogeny

Molecular Phylogenetics and Evolution ◽

10.1006/mpev.2000.0861 ◽

2001 ◽

Vol 18 (1) ◽

pp. 54-65 ◽

Cited By ~ 28

Author(s):

Dirk Mattern ◽

Martin Schlegel

Keyword(s):

Molecular Evolution ◽

Ribosomal Dna ◽

Small Subunit ◽

Small Subunit Ribosomal Dna

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