scholarly journals Molecular analysis reveals high diversity in the Hoplias malabaricus (Characiformes, Erythrinidae) species complex from different Amazonian localities

2021 ◽  
Vol 51 (2) ◽  
pp. 139-144
Author(s):  
Alex M. V. FERREIRA ◽  
Leila Braga RIBEIRO ◽  
Eliana FELDBERG
Keyword(s):  
Species Complex ◽  
Molecular Diversity ◽  
Evolutionary Model ◽  
Bootstrap Support ◽  
Cryptic Diversity ◽  
Cytochrome Oxidase Subunit ◽  
Karyotypic Analysis ◽  
Hoplias Malabaricus ◽  
Cytogenetic Analyses ◽  
High Diversity

ABSTRACT DNA barcoding proposes that a fragment of DNA can be used to identify species. In fish, a fragment of cytochrome oxidase subunit I (COI) has been effective in many studies with different foci. Here we use this molecular tool to provide new insights into the cryptic diversity found in the Hoplias malabaricus species complex. Popularly known as trahira, H. malabaricus is widely distributed in South America. The clade shows molecular and cytogenetic diversity, and several studies have supported the occurrence of a complex of species. We performed molecular and karyotypic analysis of H. malabaricus individuals from eight Amazonian localities to assess the diversity present in the nominal taxon, and to clarify relationships within this group. We used 12 samples in cytogenetic analyses and found two karyomorphs: 2n = 40 (20m + 20sm) (karyomorph C) and 2n = 42 (22m + 20sm) (karyomorph A). We used 19 samples in molecular analyses with COI as a molecular marker, maximum likelihood analyses, and the Kimura-2-parameter evolutionary model with bootstrap support. We found karyomorph-related differentiation with bootstrap of 100%. However, we found high molecular diversity within karyomorph C. The observed pattern allowed us to infer the presence of cryptic diversity, reinforcing the existence of a species complex.

scholarly journals Densely sampled phylogenetic analyses of the Lesser Short‐toed Lark ( Alaudala rufescens ) — Sand Lark ( A. raytal ) species complex (Aves, Passeriformes) reveal cryptic diversity

2020 ◽  
Vol 49 (4) ◽  
pp. 427-439 ◽  
Author(s):  
Fatemeh Ghorbani ◽  
Mansour Aliabadian ◽  
Ruiying Zhang ◽  
Martin Irestedt ◽  
Yan Hao ◽  
...  
Keyword(s):  
Species Complex ◽  
Phylogenetic Analyses ◽  
Cryptic Diversity

scholarly journals Moko Disease-Causing Strains of Ralstonia solanacearum from Brazil Extend Known Diversity in Paraphyletic Phylotype II

2014 ◽  
Vol 104 (11) ◽  
pp. 1175-1182 ◽  
Author(s):  
Greecy M. R. Albuquerque ◽  
Liliana A. Santos ◽  
Kátia C. S. Felix ◽  
Christtianno L. Rollemberg ◽  
Adriano M. F. Silva ◽  
...  
Keyword(s):  
Dna Repair ◽  
Latin America ◽  
Ralstonia Solanacearum ◽  
Species Complex ◽  
Genetic Clusters ◽  
High Diversity

The epidemic situation of Moko disease-causing strains in Latin America and Brazil is unclear. Thirty-seven Ralstonia solanacearum strains from Brazil that cause the Moko disease on banana and heliconia plants were sampled and phylogenetically typed using the endoglucanase (egl) and DNA repair (mutS) genes according to the phylotype and sequevar classification. All of the strains belonged to phylotype II and a portion of the strains was typed as the Moko disease-related sequevars IIA-6 and IIA-24. Nevertheless, two unsuspected sequevars also harbored the Moko disease-causing strains IIA-41 and IIB-25, and a new sequevar was described and named IIA-53. All of the strains were pathogenic to banana and some of the strains of sequevars IIA-6, IIA-24, and IIA-41 were also pathogenic to tomato. The Moko disease-causing strains from sequevar IIB-25 were pathogenic to potato but not to tomato. These results highlight the high diversity of strains of Moko in Brazil, reinforce the efficiency of the egl gene to reveal relationships among these strains, and contribute to a better understanding of the diversity of paraphyletic Moko disease-causing strains of the R. solanacearum species complex, where the following seven distinct genetic clusters have been described: IIA-6, IIA-24, IIA-41, IIA-53, IIB-3, IIB-4, and IIB-25.

scholarly journals Epimeria schiaparelli sp. nov., an amphipod crustacean (family Epimeriidae) from the Ross Sea, Antarctica, with molecular characterisation of the species complex  

Zootaxa ◽  
2007 ◽  
Vol 1402 (1) ◽  
pp. 23 ◽  
Author(s):  
ANNE-NINA LÖRZ ◽  
ELIZABETH W. MAAS ◽  
KATRIN LINSE ◽  
GRAHAM D. FENWICK
Keyword(s):  
Species Complex ◽  
Ross Sea ◽  
Similar Species ◽  
Molecular Characterisation ◽  
Cytochrome Oxidase Subunit ◽  
Mitochondrial Cytochrome Oxidase Subunit ◽  
Antarctic Species ◽  
Amphipod Crustacean ◽  
Colour Patterns ◽  
Mitochondrial Cytochrome Oxidase

Epimeria schiaparelli sp. nov. from the Ross Sea, Antarctica, is described in detail. The new species occurs on the shelf in 130–350 m depth. Epimeria schiaparelli can be distinguished from the most similar species, E. similis Chevreux, 1912 and E. macrodonta Walker, 1906 by a relatively short rostrum and a short second pereonite amongst other characters. Two distinct colour patterns are reported. Partial gene sequences of the mitochondrial cytochrome oxidase subunit I (COI) from 11 specimens of E. schiaparelli confirm that this species is new to science and closely related to E. similis, E. macrodonta and E. reoproi. The recent and historical separation of this Antarctic species is discussed. The syntypes of E. macrodonta consist of two species, so a lectotype is here designated.

Cryptic diversity and species boundaries within the Paragalago zanzibaricus species complex

2020 ◽  
Vol 150 ◽  
pp. 106887
Author(s):  
Luca Pozzi ◽  
Anna Penna ◽  
Simon K. Bearder ◽  
Johan Karlsson ◽  
Andrew Perkin ◽  
...  
Keyword(s):  
Species Complex ◽  
Species Boundaries ◽  
Cryptic Diversity

scholarly journals Schistosoma haematobiumin Lake Malaŵi: susceptibility and molecular diversity of the snail hostsBulinus globosusandB. nyassanus

2008 ◽  
Vol 82 (4) ◽  
pp. 377-382 ◽  
Author(s):  
J.R. Stauffer ◽  
H. Madsen ◽  
B. Webster ◽  
K. Black ◽  
D. Rollinson ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Causative Agent ◽  
Schistosoma Haematobium ◽  
Species Complex ◽  
Molecular Diversity ◽  
Lake Malawi ◽  
Intermediate Hosts ◽  
Urinary Schistosomiasis ◽  
Bulinus Globosus ◽  
Mitochondrial Sequences

AbstractIntermediate hosts ofSchistosoma haematobium, the causative agent of urinary schistosomiasis, in Lake Malaŵi include:Bulinus globosus, a member of theB. africanusgroup andB. nyassanus, a diploid member of theB. truncatus/tropicusspecies complex. We compared genetic variability between isolates ofS. haematobiumfrom the southern part of the lake (Cape Maclear), where bothB. globosusandB. nyassanusplay a role as intermediate hosts, and isolates from the northern part, where onlyB. globosusis host. Data show that theS. haematobiumisolates from these two areas of Lake Malaŵi cannot be distinguished using nuclear or mitochondrial sequences and are capable of cross-infections.

scholarly journals A Preliminary Phylogeny of Rhyacophilidae with Reference to Fansipangana and the Monophyly of Rhyacophila

Zoosymposia ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. 189-192
Author(s):  
JULIANNE E. MCLAUGHLIN ◽  
PAUL B. FRANDSEN ◽  
WOLFRAM MEY ◽  
STEFFEN U. PAULS
Keyword(s):  
Mitochondrial Dna ◽  
Cytochrome Oxidase ◽  
Ribosomal Rna ◽  
Additional Data ◽  
Sister Taxon ◽  
Bootstrap Support ◽  
Cytochrome Oxidase Subunit ◽  
Cytochrome Oxidase Subunit I ◽  
Data Set ◽  
Extensive Data

The phylogeny of Rhyacophilidae was explored with 28S ribosomal RNA (rRNA) and Cytochrome Oxidase Subunit I (COI) mitochondrial DNA (mtDNA). Eighty one rhyacophilids were included in the analysis. We found that although Rhyacophilidae was recovered as monophyletic, intrafamilial relationships are not well-resolved using this dataset. Bootstrap support was poor for intrageneric relationships and additional data will be required to present a more robust hypothesis. The recovered phylogeny places Fansipangana as the sister taxon of the rest of Rhyacophilidae. We found that Himalopsyche was nested inside the genus Rhyacophila with the verrula group sister to Himalopsyche and remaining Rhyacophila. These results and possible relationships should be tested with a more extensive data set.

scholarly journals Untangling the Lactifluus clarkeae - Lf. flocktoniae (Russulaceae) species complex in Australasia

2021 ◽  
Author(s):  
T. Lebel ◽  
J. Douch ◽  
L. Tegart ◽  
L. Vaughan ◽  
J.A. Cooper ◽  
...  
Keyword(s):  
New Species ◽  
New Zealand ◽  
Species Complex ◽  
Molecular Data ◽  
Habitat Associations ◽  
Species Level ◽  
Range Extension ◽  
Cryptic Diversity ◽  
Identification Of Species

The Lactifluus clarkeae complex is a commonly observed, generally brightly coloured, group of mushrooms that are usually associated with Nothofagus or Myrtaceous hosts in Australia and New Zealand. For this study collections labelled as ‘Lactarius clarkeae’, ‘Russula flocktoniae’ and ‘Lactarius subclarkeae’ were examined morpiperatphologically and molecularly. Analyses of molecular data showed a high cryptic diversity, with sequences scattered across 11 clades in three subgenera within Lactifluus, and a single collection in Russula. We select epitypes to anchor the currently accepted concepts of Lf. clarkeae s.str. and Lf. flocktoniae s.str. The name Lf. subclarkeae could not be applied to any of the collections examined, as none had a lamprotrichoderm pileipellis. Lactifluus clarkeae var. aurantioruber is raised to species level, and six new species are described, three in subg. Lactifluus: Lf. jetiae, Lf. pagodicystidiatus, and Lf. rugulostipitatus, and three in subg. Gymnocarpi: Lf. albens, Lf. psammophilus, and Lf. pseudoflocktoniae. A new collection of Lf. russulisporus provides a significant range extension for the species. Untangling this complex will enable better identification of species and increase understanding of diversity and specific habitat associations of macrofungi.

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