Phylogenetic position and morphology of Abrothrix illutea Thomas, 1925, with comments on the incongruence between gene trees of Abrothrix (Rodentia, Cricetidae) and their implications for the delimitation of the genus

2011 ◽  
Vol 87 (2) ◽  
pp. 227-241 ◽  
Author(s):  
Pablo Teta ◽  
Guillermo D'Elía ◽  
Ulyses F. J. Pardiñas ◽  
J. Pablo Jayat ◽  
Pablo E. Ortíz
Keyword(s):  
Phylogenetic Position ◽  
Gene Trees

scholarly journals The Phylogenetic Position of Vincetoxicum pannonicum (Borhidi) Holub Supports the Species' Allopolyploid Hybrid Origin

2020 ◽  
Vol 89 (3) ◽  
Author(s):  
Orsolya Horváth ◽  
Levente Laczkó ◽  
Zsuzsa Lisztes-Szabó ◽  
Attila Molnár V. ◽  
Agnieszka Popiela ◽  
...  
Keyword(s):  
Genome Size ◽  
Hybrid Origin ◽  
Phylogenetic Position ◽  
Gene Trees ◽  
Separate Species ◽  
Diploid Parent ◽  
Hybridization Event ◽  
Pollen Donor ◽  
Molecular Phylogenetic ◽  
Allotetraploid Hybrid

The Pannonian endemic species <em>Vincetoxicum pannonicum </em>was described from specimens collected in Hungary and occurs at only few locations. It is considered “vulnerable” according to the International Red List. The chromosome set was reported to be tetraploid, and the species was hypothesized to be an allotetraploid hybrid of the Balkan species <em>V. fuscatum </em>and the Adriatic species <em>hirundinaria </em>subsp. <em>adriaticum. </em>We investigated the origin of <em>V. pannonicum </em>using molecular phylogenetic methods by separately analyzing the multicopy nuclear ribosomal internal transcribed spacer (nrITS) and the plastid-encoded <em>trn</em>H-<em>psb</em>A DNA regions and by evaluating discrepancies between the produced gene trees. Paralogs in the nrITS region clustered in two main groups, one of which was closest to <em>V. fuscatum</em>, and the other included <em>V. hirundinaria </em>subsp. <em>adriaticum</em>. According to <em>trn</em>H-<em>psb</em>A sequences, <em>V. pannonicum </em>and <em>V. hirundinaria </em>subsp. <em>adriaticum </em>formed a single group. Our results show that <em>V. pannonicum </em>diversified because of hybrid speciation, in which <em>V. fuscatum </em>was the pollen donor. We discovered a similar placement of <em>V. maeoticum</em>, which suggests a further hybridization event between <em>V. fuscatum </em>and a species of the <em>V. hirundinaria </em>group. Our genome-size estimate indicates almost sixfold larger genome size in <em>V. pannonicum </em>compared to the maternal diploid parent, suggesting hexaploidy; however, <em>V. pannonicum </em>is tetraploid. This may suggest cytological diploidization in the allopolyploid <em>V. pannonicum</em>. We observed substantial genetic distance between <em>V. hirundinaria </em>subsp. <em>adriaticum </em>and all other subspecies of <em>V. hirundinaria</em>, and we therefore propose that <em>V. adriaticum </em>should be regarded as a separate species.

scholarly journals On the systematics and the phylogenetic position of the poorly known, montane dragon-lizard species Pseudocalotes austeniana (Annandale, 1908) (Squamata, Agamidae, Draconinae)

2021 ◽  
Vol 5 (1) ◽  
pp. 141-150
Author(s):  
Gaurang G. Gowande ◽  
Harshal S. Bhosale ◽  
Pushkar U. Phansalkar ◽  
Mandar Sawant ◽  
Zeeshan A. Mirza
Keyword(s):  
Molecular Phylogenetics ◽  
Sequence Data ◽  
Systematic Position ◽  
Sensu Stricto ◽  
Evolutionary Significance ◽  
Phylogenetic Position ◽  
Gene Trees ◽  
Lizard Species ◽  
Molecular Sequence Data ◽  
Molecular Sequence

The montane agamid species Pseudocalotes austeniana has had a complicated taxonomic history, as the species was initially described as a member of the genus Salea Gray, 1845. Later, the species was placed in a monotypic genus Mictopholis Smith, 1935, which was erected only to include this species; however, the species was later on transferred to the genus Pseudocalotes Fitzinger, 1843, owing to the morphological similarities, and lack of strong characters to diagnose the genus Mictopholis. Nonetheless, its precise phylogenetic and systematic position has remained unresolved due to the lack of molecular sequence data. During a herpetological expedition to Arunachal Pradesh, specimens of P. austeniana were collected from the hills near the type locality. The mitochondrial 16S rRNA, ND2 and ND4, and the nuclear RAG1 regions were subjected to molecular phylogenetics. Maximum Likelihood and Bayesian Inference gene trees revealed that P. austeniana is a member of the subfamily Draconinae. The analyses showed that the genus Pseudocalotes is polyphyletic, and P. austeniana was embedded within the genus Japalura Gray, 1853 sensu stricto. We here, thus, propose to transfer the species P. austeniana to the genus Japlaura, as Japalura austenianacomb. nov. Biogeographic and evolutionary significance of the findings are discussed.

Gene trees: A powerful tool for exploring the evolutionary biology of species and speciation

2000 ◽  
Vol 15 (3) ◽  
pp. 211-222 ◽  
Author(s):  
Alan R. Templeton ◽  
Stephanie D. Maskas ◽  
Mitchell B. Cruzan
Keyword(s):  
Evolutionary Biology ◽  
Gene Trees

Phylogenetic position ofKontumia(Polypodiaceae) inferred from four chloroplast DNA regions

2012 ◽  
pp. n/a-n/a
Author(s):  
Changkyun Kim ◽  
Hong-Guang Zha ◽  
Tao Deng ◽  
Hang Sun ◽  
Su-Gong Wu
Keyword(s):  
Chloroplast Dna ◽  
Phylogenetic Position ◽  
Chloroplast Dna Regions

Paepalanthus fabianeae (Eriocaulaceae): A New Microendemic Species from a Morphologically Coherent Clade

2020 ◽  
Vol 45 (4) ◽  
pp. 794-801
Author(s):  
Caroline Oliveira Andrino ◽  
Marcelo Fragomeni Simon ◽  
Jair Eustáquio Quintino Faria ◽  
André Luiz da Costa Moreira ◽  
Paulo Takeo Sano
Keyword(s):  
New Species ◽  
Iucn Red List ◽  
Phylogenetic Position ◽  
Similar Species ◽  
Infrageneric Classification ◽  
Espinhaço Range ◽  
Nuclear Its ◽  
Two Populations

Abstract—We describe and illustrate Paepalanthus fabianeae, a new species of Eriocaulaceae from the central portion of the Espinhaço Range in Minas Gerais, Brazil. Previous phylogenetic evidence based on analyses of nuclear (ITS and ETS) and plastid (trnL-trnF and psba-trnH) sequences revealed P. fabianeae as belonging to a strongly supported and morphologically coherent clade containing five other species, all of them microendemic, restricted to the Espinhaço range. Due to the infrageneric classification of Paepalanthus being highly artificial, we preferred not assigning P. fabianeae to any infrageneric group. Paepalanthus fabianeae is known from two populations growing in campos rupestres (highland rocky fields) in the meridional Espinhaço Range. The species is characterized by pseudodichotomously branched stems, small, linear, recurved, and reflexed leaves, urceolate capitula, and bifid stigmas. Illustrations, photos, the phylogenetic position, and a detailed description, as well as comments on habitat, morphology, and affinities with similar species are provided. The restricted area of occurrence allied with threats to the quality of the habitat, mainly due to quartzite mining, justifies the preliminary classification of the new species in the Critically Endangered (CR) category using the guidelines and criteria of the IUCN Red List.

A new species of lambdarina (rhynchonellida, brachiopoda) from the viséan of central sudetes (Poland) and its phylogenetic position

2014 ◽  
Vol 64 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Jolanta Muszer
Keyword(s):  
New Species ◽  
Full Range ◽  
Morphological Features ◽  
Phylogenetic Position ◽  
Growth Stages ◽  
Tropical Waters ◽  
Marginal Seas ◽  
Sw Poland ◽  
A New Species

Abstract A new species of micromorphic articulate brachiopod (Rhynchonellida) Lambdarina jugowiensis sp. nov., from the upper Visean (Sokolec Beds) of central Sudetes, SW Poland, is described. The studied specimens are calcified, what makes them unique in respect of their state of preservation. The material is represented by a full range of growth stages; from brephic to gerontic. Based on its morphological features and the palaeogeographical distribution of all its known species, two main evolutionary lines are proposed for the genus; the Australian and the European ones. Lambdarina was widely distributed in the equatorial-tropical waters of marginal seas of the Palaeotethys Ocean, mostly during Mississippian time.

Hemiflagellochloris (Chlorophyceae, Chlorophyta), a new for Russian flora genus of green algae

2014 ◽  
Vol 48 ◽  
pp. 104-113
Author(s):  
A. D. Temraleeva ◽  
E. V. Mincheva ◽  
Yu. S. Bukin ◽  
M. V. Eltsov ◽  
V. A. Demkin ◽  
...  
Keyword(s):  
Green Algae ◽  
Molecular Analysis ◽  
18S Rdna ◽  
Phylogenetic Position ◽  
Rdna Gene ◽  
Algal Strain ◽  
The North ◽  
Volgograd Region ◽  
First Time ◽  
18S Rdna Gene

The genus Hemiflagellochloris Watanabe et al. was found in Russia for the first time. The algal strain was isolated from a buried solonetz in the zone of dry steppes (the north-end of Ergeni Hills, Volgograd Region). The morphology and ecology of this isolate are described. Its phylogenetic position within Chlorophyceae is determined by molecular analysis of 18S rDNA gene.

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