Megalothorax laevis (Neelipleona, Neelidae): Account of a neglected springtail widely distributed in the intertropical zone

2018 ◽  
Vol 38 (03) ◽  
pp. 168-191 ◽  
Author(s):  
C. Schneider ◽  
S. D. Zon ◽  
C. A. D'Haese
Keyword(s):  
16S Rdna ◽  
Ivory Coast ◽  
French Guiana ◽  
Molecular Data ◽  
28S Rdna ◽  
Type Locality ◽  
Phylogenetic Position ◽  
Reunion Island ◽  
Réunion Island ◽  
First Time

AbstractThe springtailMegalothorax laevisDenis, 1948 is redescribed from a broad sampling in the intertropical zone: Vietnam (including type locality), Ivory Coast, Gabon, Réunion island and French Guiana. Pseudopore-like elements are for the first time reported on the trunk and legs ofMegalothoraxspecies. New molecular data forM. laevis(16S rDNA, 28S rDNA d1 and d2 and COI Barcode) are provided. The phylogenetic position of the species within theMegalothoraxgenus is analysed.Megalothorax laevisbelongs to theincertusgroup but shares similitudes with theminimusgroup acquired through evolutionary convergences (such as smooth lamellae of the mucro). Those similitudes might have created confusion betweenM. minimusandM. laevis. WhileM. minimusused to be regarded cosmopolitan,M. laevishas been overlooked since its original discovery. However, the present sampling led us to believe thatM. laevisreplaceM. minimusas the commonest edaphicMegalothoraxspecies in the intertropical zone. A key to theMegalothoraxspecies with smooth mucro lamellae is provided.

scholarly journals New molecular sequences for two genera of marine planarians facilitate determination of their position in the phylogenetic tree, with new records for two species (Platyhelminthes, Tricladida, Maricola)

ZooKeys ◽  
2018 ◽  
Vol 781 ◽  
pp. 1-17 ◽  
Author(s):  
Hee-Min Yang ◽  
Ronald Sluys ◽  
Masaharu Kawakatsu ◽  
Gi-Sik Min
Keyword(s):  
Phylogenetic Tree ◽  
New Records ◽  
Taxonomic Status ◽  
Molecular Data ◽  
Phylogenetic Position ◽  
Molecular Sequences ◽  
Histological Studies ◽  
Anatomical Features ◽  
First Time

For the first time, molecular sequences of the 18S ribosomal DNA were generated for representatives of the genera Obrimoposthia Sluys & Ball, 1989 and Paucumara Sluys, 1989 of the suborder of the marine triclads, or Maricola, by analyzing the species Obrimoposthiawandeli (Hallez, 1906) and Paucumaratrigonocephala (Ijima & Kaburaki, 1916). On the basis of this molecular data the phylogenetic position of these two genera in the phylogenetic tree of the Maricola was determined and compared with their position in the phylogeny based on the analysis of anatomical features. New records for these two species are documented and their taxonomic status is determined on the basis of histological studies.

Phylogenetic position of Coronastrum ellipsoideum and description of Parachlorella hussii sp. nov.

Biologia ◽  
2011 ◽  
Vol 66 (4) ◽  
Author(s):  
Christina Bock ◽  
Marie Pažoutová ◽  
Lothar Krienitz
Keyword(s):  
Molecular Data ◽  
Phylogenetic Position ◽  
Rrna Gene ◽  
Combined Approach ◽  
Molecular Analyses ◽  
Phylogenetic Studies ◽  
The Family ◽  
Its Rrna Gene ◽  
Molecular Phylogenetic ◽  
First Time

AbstractFollowing traditional morphological concepts, the genus Coronastrum is considered to be a rare member of the Scenedesmaceae (Chorophyceae). This classification may be called into question when molecular data are taken into account as well. Recent molecular phylogenetic studies revealed the polyphyletic origin of the family Scenedesmaceae within the Chlorophyceae and Trebouxiophyceae. In a combined approach of morphological analyses, SSU/ITS rRNA gene phylogeny and comparison of the ITS secondary structure, we analysed the systematics of Coronastrum strains available in public strain collections. Our molecular analyses revealed a new subclade within the Chlorella clade of the Chlorellaceae consisting of Coronastrum ellipsoideum, two strains with Dictyosphaerium-like morphology and one strain which fits the description of the genus Parachlorella. Four additional strains formed together a new lineage within the genus Parachlorella in the Parachlorella clade of the Chlorellaceae. These strains differ from the already known Parachlorella species in complementary base changes within the ITS2 and are here described for the first time as Parachlorella hussii sp. nov.

A new predatory leech from Vietnam (Hirudinida : Arhynchobdellida : Salifidae): its phylogenetic position with comments on the classification of the family

2015 ◽  
Vol 29 (5) ◽  
pp. 473 ◽  
Author(s):  
Takafumi Nakano ◽  
Son Truong Nguyen
Keyword(s):  
Phylogenetic Relationships ◽  
Phylogenetic Analyses ◽  
Morphological Characteristics ◽  
Molecular Data ◽  
Phylogenetic Position ◽  
12S Rrna ◽  
The Family ◽  
Morphological And Molecular Data ◽  
First Time

The family Salifidae is a predaceous leech taxon in the suborder Erpobdelliformes. Although Salifidae is widely distributed in the African, Oriental, Indo-Malayan, Sino-Japanese and Australasian regions, the phylogenetic relationships of the family Salifidae have never been tested using molecular data obtained from leeches collected from the family distributional range. A salifid species was collected for the first time in Vietnam, and relevant morphological and molecular data are presented here. Because the Vietnamese salifid species possesses unique morphological characteristics among the known salifid species, this species is herein described as a new species, Salifa motokawai, sp. nov. Phylogenetic analyses based on nuclear 18S rRNA and histone H3, as well as mitochondrial cytochrome c oxidase subunit I, tRNACys, tRNAMet, 12S rRNA, tRNAVal, 16S rRNA, tRNALeu and NADH dehydrogenase subunit 1 markers demonstrate that the Vietnamese salifid species is a close congener with the African Salifa perspicax and the Malagasy Linta be. Furthermore, molecular data revealed non-monophyly of the Asian salifid leeches. According to the observed phylogenetic relationships and morphological characteristics of the Vietnamese Salifa motokawai, sp. nov., the current classification of salifid taxa should be revised.

scholarly journals Morphometrical and molecular data on plant parasitic nematodes Longidorus attenuatus Hooper, 1961 and L. danuvii Barsi et al., 2007 (Nematoda: Longidoridae) reported from Ukraine for the first time

2016 ◽  
Vol 53 (4) ◽  
pp. 396-400 ◽  
Author(s):  
S. Susulovska ◽  
A. Susulovsky ◽  
F.W. Kornobis
Keyword(s):  
Plant Root ◽  
Nematode Species ◽  
Molecular Data ◽  
Rubus Idaeus ◽  
28S Rdna ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Dry Conditions ◽  
28S Rdna Sequence ◽  
First Time

Summary Genus Longidorus Micoletzky, 1927 consists of obligatory plant root ectoparasites. Some of the genus species are of economic importance as pests of agricultural plants. This paper presents first records of Longidorus attenuatus Hooper, 1961 and L. danuvii Barsi et al., 2007 from Ukraine. Data on morphometrics and D2-D3 28S rDNA region sequence are provided. Additionally, a D2-D3 28S rDNA sequence from a population described previously from Poland was included. For the first time L. danuvii has been found with plants of agricultural importance (Malus domestica Borkh., Pyrus sp. and Rubus idaeus L.). Additionally, this nematode species has been found for the first time in localities with relatively dry conditions (on the tops of the hills), which are distant from banks of rivers – biotopes from which it has been recorded previously.

scholarly journals Phylogenetic position of trematode Amurotrema dombrowskajae Achmerow, 1959 (Paramphistomoidea: Cladorchiidae) based on partial 28S rDNA nucleotide sequences

2016 ◽  
Vol 53 (2) ◽  
pp. 161-164 ◽  
Author(s):  
S. G. Sokolov ◽  
D. I. Lebedeva ◽  
A. P. Kalmykov
Keyword(s):  
Bayesian Inference ◽  
Intestinal Parasite ◽  
Molecular Data ◽  
Nucleotide Sequences ◽  
28S Rdna ◽  
Ctenopharyngodon Idella ◽  
Phylogenetic Position ◽  
Volga River ◽  
Volga River Delta ◽  
The Family

SummaryThe trematode Amurotrema dombrowskajae Achmerow, 1959, is the type and the only species of the paramphistomoid genus Amurotrema Achmerow, 1959. This intestinal parasite of grass carp (Ctenopharyngodon idella) was introduced with host to the Volga River Delta. These naturalized trematodes were found by the authors in 2014 – 2015. In the present study the phylogenetic position of Amurotrema dombrowskajae is analysed using partial 28S rDNA nucleotide sequences. Bayesian inference and Maximum Likelihood analyses place this species in a clade with representatives of the family Cladorchiidae - Megalodiscus temperatus (Stafford, 1905) and Indosolenorchis hirudinaceus Crusz, 1951. Thus, molecular data are consistent with the traditional view on the position of A. dombrowskajae in this family.

Schmidleinema santiniketanense sp. nov. (Cyanobacteria/ Cyanoprokaryota) from a building facade in Santiniketan, India

Phytotaxa ◽  
2016 ◽  
Vol 283 (2) ◽  
pp. 181 ◽  
Author(s):  
NITIN KESHARI ◽  
SUDIPTA KUMAR DAS ◽  
SIBA PRASAD ADHIKARY
Keyword(s):  
West Bengal ◽  
Morphological Characters ◽  
Molecular Data ◽  
Phylogenetic Position ◽  
Rrna Gene ◽  
Rare Occurrence ◽  
Climatic Region ◽  
Consensus Tree ◽  
The Family ◽  
First Time

Schmidleinema is a monotypic genus in the family Fischerellaceae (Cyanobacteria / Cyanoprokaryota) with S. indicum is the sole species described so far. Due to its rare occurrence and reported only from a tropical climatic region, the taxon was not thoroughly studied, thus its taxonomic position is ubiquitous. No molecular data of the species is available so far. While studying the aero-terrestrial cyanobacterial flora of Santiniketan, West Bengal (India), a new Schmidleinema species, i.e. Schmidleinema santiniketanense sp. nov. was documented.  Light microscopic study of morphological characters of the species revealed its distinctness from the earlier descriptions of Schmidleinema indicum, particularly in the characteristics of sheath and branching pattern. Partial sequence of 16S rRNA gene of the species was obtained and deposited in GenBank for the first time. A consensus tree prepared with  sequences of different groups of  heterocystous and branched cyanobacteria retrieved from GenBank showed its phylogenetic position.

The redescription of the species Leptochelia bispinosa Guţu and L. corsica Dollfus, and the first description of the female of L. tenuicula Makkaveeva (Crustacea: Tanaidacea)

2011 ◽  
Vol 54 (1) ◽  
pp. 21-41
Author(s):  
Modest Guţu
Keyword(s):  
Indian Ocean ◽  
Adriatic Sea ◽  
Lesser Antilles ◽  
Reunion Island ◽  
Réunion Island ◽  
First Time

The redescription of the species Leptochelia bispinosa Guţu and L. corsica Dollfus, and the first description of the female of L. tenuicula Makkaveeva (Crustacea: Tanaidacea) Leptochelia bispinosa Guţu, 2010 (from Réunion Island, Indian Ocean) and L. corsica Dollfus, 1898 (from Adriatic Sea) are redescribed and illustrated. The number of antennule articles in the specimens with female features belonging to the species L. bispinosa is commented. The female of L. tenuicula Makkaveeva, 1968 (from Martinique Island, Lesser Antilles) is recorded and described for the first time. At the same time, the diagnosis of the genus Leptochelia, as it is accepted now, is amended.

Phylogenetic position of the crustose Stereocaulon species

2014 ◽  
Vol 46 (1) ◽  
pp. 103-114 ◽  
Author(s):  
Filip HÖGNABBA ◽  
Raquel PINO-BODAS ◽  
Anders NORDIN ◽  
Leena MYLLYS ◽  
Soili STENROOS
Keyword(s):  
Maximum Likelihood ◽  
Phylogenetic Relationships ◽  
Growth Form ◽  
Additional Data ◽  
Molecular Data ◽  
Phylogenetic Position ◽  
Spore Type ◽  
Direct Optimization ◽  
Bayesian Analyses ◽  
First Time

AbstractPhylogenetic relationships of Stereocaulon with emphasis on the crustose taxa were studied based on nuclear ribosomal ITS1–5.8S–ITS2 and partial beta-tubulin sequences. The placement of four of the six crustose species currently included in the genus has previously been confirmed based on molecular data. It has, however, remained unresolved whether the crustose growth form is a plesiomorphic or apomorphic feature within Stereocaulon, due to contradictory placements of the crustose species in earlier studies. The aim of this study was to clarify the position of the crustose species by including additional data, especially of S. nivale and S. plicatile, which have not been included in previous analyses. The inclusion of S. plicatile in the genus is of particular interest as it is the only species in the genus with submurifrom to muriform ascospores. Altogether 37 specimens representing 31 species of the ingroup, including all the crustose Stereocaulon species, were incorporated in the analyses. Conventional, as well as direct optimization parsimony, maximum likelihood and Bayesian analyses were performed. The results show that the crustose species do not form a monophyletic entity and that the crustose growth form is a plesiomorphic feature within Stereocaulon. The crustose S. nivale and S. plicatile are nested within the genus and their inclusion in Stereocaulon is thereby confirmed. The nested position of S. plicatile indicates that the submuriform to muriform spore type has been gained independently within the genus. Here, S. plicatile is also reported for the first time from Scandinavia.

Five new morphological types of virgulate and microcotylous xiphidiocercariae based on morphological and molecular phylogenetic analyses

2019 ◽  
Vol 94 ◽  
Author(s):  
S.V. Shchenkov ◽  
S.A. Denisova ◽  
G.A. Kremnev ◽  
A.A. Dobrovolskij
Keyword(s):  
Phylogenetic Analyses ◽  
Morphological Characters ◽  
Molecular Data ◽  
Phylogenetic Position ◽  
The Family ◽  
Family Level ◽  
Molecular Phylogenetic ◽  
Morphological And Molecular Data ◽  
First Time

Abstract The phylogenetic position of most xiphidiocercariae from subgroups Cercariae virgulae and Cercariae microcotylae remains unknown or unclear, even at the family level. In this paper, we studied the morphology and molecular phylogeny of 15 microcotylous and virgulate cercariae (11 new and four previously described ones). Based on morphological and molecular data, we suggested five distinct morphological types of xiphidiocercariae, which are a practical alternative to Cercariae virgulae and Cercariae microcotylae subgroups. Four of these types correspond to actual digenean taxa (Microphallidae, Lecithodendriidae, Pleurogenidae and Prosthogonimidae), while the fifth is represented by Cercaria nigrospora Wergun, 1957, which we classified on the basis of molecular data for the first time. We reassessed the relative importance of morphological characters used for the classification of virgulate and microcotylous cercariae, and discussed the main evolutionary trends within xiphidiocercariae. Now stylet cercariae can be reliably placed into several sub-taxa of Microphalloidea on the basis of their morphological features.

scholarly journals Molecular Investigation of Recurrent Streptococcus iniae Epizootics Affecting Coral Reef Fish on an Oceanic Island Suggests at Least Two Distinct Emergence Events

2021 ◽  
Vol 12 ◽  
Author(s):  
Solène Irion ◽  
Oleksandra Silayeva ◽  
Michael Sweet ◽  
Pascale Chabanet ◽  
Andrew C. Barnes ◽  
...  
Keyword(s):  
Reef Fishes ◽  
The United States ◽  
Molecular Data ◽  
Streptococcus Iniae ◽  
Reunion Island ◽  
Introduction Pathways ◽  
Low Genetic Diversity ◽  
Freshwater Aquaculture ◽  
Réunion Island ◽  
Aquaculture Facilities

Streptococcus iniae is an emerging zoonotic pathogen of increasing concern for aquaculture and has caused several epizootics in reef fishes from the Caribbean, the Red Sea and the Indian Ocean. To study the population structure, introduction pathways and evolution of S. iniae over recurring epizootics on Reunion Island, we developed and validated a Multi Locus Sequence Typing (MLST) panel using genomic data obtained from 89 isolates sampled during epizootics occurring over the past 40years in Australia, Asia, the United States, Israel and Reunion Island. We selected eight housekeeping loci, which resulted in the greatest variation across the main S. iniae phylogenetic clades highlighted by the whole genomic dataset. We then applied the developed MLST to investigate the origin of S. iniae responsible for four epizootics on Reunion Island, first in inland aquaculture and then on the reefs from 1996 to 2014. Results suggest at least two independent S. iniae emergence events occurred on the island. Molecular data support that the first epizootic resulted from an introduction, with inland freshwater aquaculture facilities acting as a stepping-stone. Such an event may have been facilitated by the ecological flexibility of S. iniae, able to survive in both fresh and marine waters and the ability of the pathogen to infect multiple host species. By contrast, the second epizootic was associated with a distinct ST of cosmopolitan distribution that may have emerged as a result of environment disturbance. This novel tool will be effective at investigating recurrent epizootics occurring within a given environment or country that is despite the fact that S. iniae appears to have low genetic diversity within its lineage.

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