scholarly journals Emendation of the Coccoid Cyanobacterial Genus Gloeocapsopsis and Description of the New Species Gloeocapsopsis diffluens sp. nov. and Gloeocapsopsis dulcis sp. nov. Isolated From the Coastal Range of the Atacama Desert (Chile)

2021 ◽  
Vol 12 ◽  
Author(s):  
Patrick Jung ◽  
Armando Azua-Bustos ◽  
Carlos Gonzalez-Silva ◽  
Tatiana Mikhailyuk ◽  
Daniel Zabicki ◽  
...  
Keyword(s):  
Genetic Information ◽  
Type Species ◽  
Atacama Desert ◽  
Gene Sequencing ◽  
Formal Description ◽  
Molecular Analyses ◽  
Cyanobacterial Species ◽  
Its Gene ◽  
Cyanobacterial Genus ◽  
Coastal Range

The taxonomy of coccoid cyanobacteria, such as Chroococcidiopsis, Pleurocapsa, Chroococcus, Gloeothece, Gloeocapsa, Gloeocapsopsis, and the related recent genera Sinocapsa and Aliterella, can easily be intermixed when solely compared on a morphological basis. There is still little support on the taxonomic position of some of the addressed genera, as genetic information is available only for a fraction of species that have been described solely on morphology. Modern polyphasic approaches that combine classic morphological investigations with DNA-based molecular analyses and the evaluation of ecological properties can disentangle these easily confusable unicellular genera. By using such an approach, we present here the formal description of two novel unicellular cyanobacterial species that inhabit the Coastal Range of the Atacama Desert, Gloeocapsopsis dulcis (first reported as Gloeocapsopsis AAB1) and Gloeocapsopsis diffluens. Both species could be clearly separated from previously reported species by 16S rRNA and 16S–23S ITS gene sequencing, the resulting secondary structures, p-distance analyses of the 16S–23S ITS, and morphology. For avoiding further confusions emendation of the genus Gloeocapsopsis as well as epitypification of the type species Gloeocapsopsis crepidinum based on the strain LEGE06123 were conducted.

scholarly journals Martensopsalis, a new genus of Neopilionidae from New Caledonia (Opiliones: Eupnoi)

Zootaxa ◽  
2021 ◽  
Vol 4984 (1) ◽  
pp. 98-107
Author(s):  
GONZALO GIRIBET ◽  
CAITLIN M. BAKER ◽  
DAMIEN BROUSTE
Keyword(s):  
Type Species ◽  
New Genus ◽  
New Caledonia ◽  
Ventral Side ◽  
External Morphology ◽  
Type Locality ◽  
Phylogenetic Position ◽  
Formal Description ◽  
Undescribed Species

New Caledonia has an endemic opiliofauna with two named species of Triaenonychidae, 17 Troglosironidae and eight Zalmoxidae. The recent finding of Neopilionidae on Grande Terre was thus surprising, and required the formal description of a new genus, which we undertake here. Martensopsalis gen. nov. is characterized by a small unsclerotized body with a unique palp with a pointed basal apophysis on the ventral side of the femur and with a distal apophysis on the prolateral side of the patella. The distinct external morphology, simple penis and unique phylogenetic position justify the erection of the new genus with Martensopsalis dogny spec. nov. as its type species. In addition to the type locality we report several other localities of putative congeneric, yet undescribed species. 

scholarly journals Cellulose Degradation by Micromonosporas Recovered from Freshwater Lakes and Classification of These Actinomycetes by DNA Gyrase B Gene Sequencing

2008 ◽  
Vol 74 (22) ◽  
pp. 7080-7084 ◽  
Author(s):  
Alexandre B. de Menezes ◽  
Robert J. Lockhart ◽  
Michael J. Cox ◽  
Heather E. Allison ◽  
Alan J. McCarthy
Keyword(s):  
Lake Water ◽  
Type Species ◽  
Cellulose Degradation ◽  
Gene Sequencing ◽  
Dna Gyrase ◽  
Selective Isolation ◽  
Freshwater Lakes ◽  
Isolation Method ◽  
Single Cluster

ABSTRACT A number of Micromonospora strains isolated from the water column, sediment, and cellulose baits placed in freshwater lakes were shown to be able to degrade cellulose in lake water without any addition of nutrients. A selective isolation method was also developed to demonstrate that CFU arose from both spores and hyphae that inhabit the lake environment. Gyrase B gene sequencing performed on the isolates identified a number of new centers of variation within Micromonospora, but the most actively cellulolytic strains were recovered in a single cluster that equated with the type species of the genus, M. chalcea.

Masonoceras, a new karagandoceratid ammonoid from the lower Mississippian (lower Osagean) of Kentucky

2002 ◽  
Vol 76 (3) ◽  
pp. 574-577 ◽  
Author(s):  
David M. Work ◽  
Walter L. Manger
Keyword(s):  
New Species ◽  
Type Species ◽  
New Genus ◽  
Systematic Position ◽  
Ventral Lobe ◽  
Formal Description ◽  
Ventral Margin ◽  
Borden Formation ◽  
Conodont Zone ◽  
A New Species

Karagandoceratids are a rare offshoot of the Prionoceratinae, resembling that subfamily in general conch form and sutural ontogeny, but differing by possession of an acute ventral margin and an increasingly trifid ventral lobe. The systematic position of the Karagandoceratidae has been controversial [see Bartzsch and Weyer (1988) for an exhaustive review]. The nominate genus, Karagandoceras Librovitch, 1940 (type species, K. galeatum), possesses a weakly divided ventral lobe which has led authors to refer it to both the Praeglyphioceratina (Ruzhencev, 1960, 1962; Bogoslovsky, 1971; Ruzhencev and Bogoslovskaya, 1978; Bogoslovskaya et al., 1999; Kusina, 2000) and the Goniatitina (Weyer, 1965, 1972; Kullmann, 1981). Discovery of an ancestral karagandoceratid genus, gen. nov. I aff. Karagandoceras Bartzsch and Weyer, 1988, in the early Tournaisian Siphonodella sandbergi conodont Zone in Germany provided clarification on the proximate origin of Karagandoceras and provided a plausible link to the early Tournaisian prionoceratin genus Nicimitoceras Korn, 1993 (type species, Imitoceras subacre Vöhringer, 1960). Bartzsch and Weyer (1988) proposed a karagandoceratid phylogeny beginning with gen. nov. I aff. Karagandoceras in the early Tournaisian, progressing through Karagandoceras in the middle Tournaisian, and culminating with a third, descendent genus, gen. nov. II aff. Karagandoceras (typical species, Karagandoceras bradfordi Manger, 1971), early in the late Tournaisian. Bartzsch and Weyer (1988) elected to leave both the initial and final members of this lineage, gen. nov. I and gen. nov. II aff. Karagandoceras, in open nomenclature pending discovery of more completely preserved material. Discovery of superbly preserved representatives of a new species of gen. nov. II aff. Karagandoceras from the Borden Formation in northeastern Kentucky provides additional sutural and morphological details that support Bartzsch and Weyer's phylogenetic interpretation and makes formal description of this terminal karagandoceratid taxon (herein designated Masonoceras new genus) possible.

Emendation of the description of the species Corynebacterium propinquum to include strains which produce urease

2013 ◽  
Vol 63 (Pt_6) ◽  
pp. 2146-2154 ◽  
Author(s):  
Kathryn Bernard ◽  
Ana Luisa Pacheco ◽  
Ian Cunningham ◽  
Navdeep Gill ◽  
Tamara Burdz ◽  
...  
Keyword(s):  
Type Species ◽  
Sequence Similarity ◽  
Gene Sequencing ◽  
16S Rrna Gene Sequencing ◽  
Rrna Gene ◽  
Single Test ◽  
Content Type ◽  
Link Type ◽  
Corynebacterium Pseudodiphtheriticum ◽  
Rrna Gene Sequencing

Corynebacterium propinquum is a Gram-positive rod occasionally recovered from clinical infections which, according to 16S rRNA gene sequencing, is most closely related (>99 % sequence similarity) to Corynebacterium pseudodiphtheriticum . The two species are very similar biochemically, commonly differentiated by a single test, the detection of urease, where strains of C. propinquum are described as being urease-non-producing and strains of C. pseudodiphtheriticum are described as urease-producing. In this study, historical and contemporary strains of C. propinquum and C. pseudodiphtheriticum from this laboratory were definitively characterized, which included use of rpoB sequencing. Urease-producing strains of C. propinquum as well as typical urease-non-producing isolates were identified after rpoB sequencing, with six of these being originally identified as C. pseudodiphtheriticum . Based on these observations, we propose emendation of the description of C. propinquum to include strains which produce urease. MALDI-TOF analysis may be a useful tool to differentiate these taxa. Existing commercial databases should be updated to include urease-positive strains of C. propinquum .

Morphometric and molecular analyses of Skrjabinolecithum pyriforme n. sp. (Digenea: Haploporidae) in mullet fish from the Primorsky Region, Russia

2016 ◽  
Vol 91 (5) ◽  
pp. 625-632 ◽  
Author(s):  
V.V. Besprozvannykh ◽  
D.M. Atopkin ◽  
A.V. Ermolenko ◽  
A.Yu. Beloded
Keyword(s):  
New Species ◽  
Oral Sucker ◽  
Body Length ◽  
Type Species ◽  
Close Relationships ◽  
The Body ◽  
Similar Species ◽  
Body Width ◽  
Molecular Analyses ◽  
A New Species

AbstractA new species of Skrjabinolecithum (Digenea: Waretrematinae), Skrjabinolecithum pyriforme n. sp., has been found in the intestines of Liza haematocheila and Mugil cephalus from the Primorsky Region, Russia. These worms differ from S. vitellosum and S. lobolecithum by the presence of two caeca, as do S. spasskii, S. indicum and S. bengalensis. These species differ morphologically from S. pyriforme n. sp. by a number of features, including body width, oral sucker, pharynx, eggs and ratio of length and width of the body. The most similar species to S. pyriforme n. sp. is Platydidymus flecterotestis (Zhukov, 1971) with some differences in maximal body length, testis and egg sizes. The results of molecular analysis confirmed that this new species belongs to Skrjabinolecithum on the basis of close relationships with S. spasskii-type species.

Boothiomyces angulosus and Boothiomyces elyensis: two new combinations in the Terramycetaceae (Rhizophydiales, Chytridiomycota)

Nova Hedwigia ◽  
2019 ◽  
Vol 109 (3) ◽  
pp. 399-412 ◽  
Author(s):  
Gustavo Henrique Jerônimo ◽  
D. Rabern Simmons ◽  
Timothy Yong James ◽  
Carmen Lidia Amorim Pires-Zottarelli
Keyword(s):  
Type Species ◽  
Phylogenetic Position ◽  
New Combinations ◽  
Electronic Microscopy ◽  
Tem Analysis ◽  
Molecular Analyses ◽  
Transmission Electronic Microscopy

The genus Rhizophydium was proposed by A. Schenk in 1858 to accommodate the inoperculate taxa previously placed in Chytridium. The morphological delineation encompassed around 235 species that have now been segregated into different genera based on molecular and zoospore ultrastructural analyses. However, some taxa have never been investigated for phylogenetic position or zoospore ultrastructural characters. The aim of this study was to use morphology, zoospore ultrastructure and molecular analyses to verify the placement of our isolates of Rhizophydium angulosum and R. elyense in the Rhizophydiales phylogeny. These isolates produced angular zoosporangia, characteristic of Terramycetaceae representatives, and grouped within the Boothiomyces clade in analyses of complete ITS and partial LSU regions of rDNA. Transmission electronic microscopy (TEM) analysis revealed that R. angulosum produces zoospores with the same ultrastructural characters described from Boothiomyces representatives. In addition, R. elyense presented sufficient characteristics that support its morphological delineation from Boothiomyces macroporosus, the type species of the genus. Based on molecular, morphological, and ultrastructural analyses, we transfer R. angulosum and R. elyense to Boothiomyces.

The phylogeny of Ryocalanoidea (Copepoda, Calanoida) based on morphology and a multi-gene analysis with a description of new ryocalanoidean species

2018 ◽  
Vol 185 (4) ◽  
pp. 925-957 ◽  
Author(s):  
Jasmin Renz ◽  
Elena L Markhaseva ◽  
Silke Laakmann
Keyword(s):  
New Species ◽  
Internal Transcribed Spacer ◽  
Type Species ◽  
Current System ◽  
Gene Analysis ◽  
Cytochrome Oxidase Subunit ◽  
Molecular Analyses ◽  
The Status ◽  
New Interpretation ◽  
Close Interrelationship

Abstract Two new species of ryocalanoid copepods (Crustacea: Calanoida), Ryocalanus squamatus sp. nov. and Yrocalanus kurilensis sp. nov. are described together with a female of Ryocalanus infelix Tanaka, 1956, type species for the genus Ryocalanus Tanaka, 1956, from abyssal depths in the Kurile-Kamchatka trench. The new species can be assigned to the superfamily Ryocalanoidea based on the segmentation and armature of the swimming legs and the modification of the male right antennule. A new interpretation of the fusions of segments in the male right antennule of Ryocalanus shows the marked differences between the ryocalanoidean genera. The status of Ryocalanoidea within the Calanoida is discussed based on morphology and a first molecular multi-gene analysis with cytochrome oxidase subunit I, cytochrome b, nuclear ribosomal 18S and 28S rDNA and internal transcribed spacer 2. This analysis supports the close interrelationship between Ryocalanoidea and Spinocalanoidea. The monophyletic status of Ryocalanoidea could not be retrieved in the phylogenetic analysis, as specimens of Yrocalanus formed a clade within Spinocalanoidea. The inconclusive results between morphological and molecular analyses are discussed with a proposition to keep the current system until more males of taxa belonging to the Spinocalanoidea are discovered, as the male antennule plays a crucial role in the interpretation of relationships between Ryocalanoidea and Spinocalanoidea.

scholarly journals Cave shrimps Troglocaris s. str. (Dormitzer, 1853), taxonomic revision and description of new taxa after phylogenetic and morphometric studies

Zootaxa ◽  
2012 ◽  
Vol 3421 (1) ◽  
pp. 1 ◽  
Author(s):  
JURE JUGOVIC ◽  
BRANKO JALŽIĆ ◽  
SIMONA PREVORČNIK ◽  
BORIS SKET
Keyword(s):  
Type Species ◽  
Morphological Variability ◽  
Taxonomic Revision ◽  
Morphological Characters ◽  
Molecular Data ◽  
Coi Gene ◽  
Distribution Area ◽  
Molecular Analyses ◽  
Morphometric Analyses ◽  
Morphological Distinction

Within the Dinaric genus Troglocaris cave shrimps from the subgenus Troglocaris s. str. (Dormitzer, 1853) (Crustacea:Decapoda: Atyidae), have the widest distribution area. The recent molecular analyses have revealed significant, crypticdiversity in the subgenus. The aim of the subsequent detailed morphometric analyses was the provision of the appropriatediagnosable characters for the discovered lineages, i.e. taking care of their taxonomical visibility. We herein designate aneotype and provide a detailed description for the polytipic type species of the genus T. (T.) anophthalmus (Kollar, 1848), toenable its morphological distinction from the erroneously described T. (T.) planinensis Birštejn, 1948. Considering acombination of morphological, geographical and molecular data, we describe four new subspecies: T. (T.) a. ocellata ssp. nov.,T. (T.) a. periadriatica ssp. nov., T. (T.) a. legovici ssp. nov. and T. (T.) a. sontica ssp. nov., apart from the extant T. (T.) a.intermedia Babić, 1922. Due to a considerable morphological variability and no easily observable diagnostic morphological characters, the GenBank accession numbers for the COI gene are added in all mentioned taxa.

Morphometric differentiation between two murid rodents, Praomys tullbergi (Thomas, 1894) and Praomys rostratus (Miller, 1900), in West Africa

Zootaxa ◽  
2007 ◽  
Vol 1607 (1) ◽  
pp. 21-34 ◽  
Author(s):  
BERTIN K. AKPATOU ◽  
VIOLAINE NICOLAS ◽  
DEBRA PIRES ◽  
ELIEZER N’GORAN ◽  
MARC COLYN
Keyword(s):  
Body Weight ◽  
West Africa ◽  
Multivariate Statistics ◽  
Gene Sequencing ◽  
Species Level ◽  
Good Discrimination ◽  
Molecular Analyses ◽  
Murid Rodents ◽  
Dental Measurements ◽  
Morphometric Differentiation

Morphometric differentiation between the two species of the genus Praomys Thomas (1915) inhabiting West Africa was investigated using univariate and multivariate statistics on external, cranial and dental measurements. One hundred and seventy six adult specimens (78 P. tullbergi and 98 P. rostratus) from fifteen localities throughout the Upper Guinean rainforest were analyzed. All specimens had been previously identified to species level by molecular analyses (16S rRNA and/or cytochrome b gene sequencing). Sexual dimorphism was observed in both species, but was more significant in P. rostratus than in P. tullbergi. Body weight was significantly lower in P. tullbergi than in P. rostratus. Moreover, males of P. tullbergi had a significantly smaller head and body length than males of P. rostratus. Specimens of P. tullbergi of both sexes were on average smaller than males of P. rostratus regarding all cranial and dental measurements, and smaller than females of P. rostratus with regard to most measurements. However, none of the cranial or dental measurements treated in our study could be used alone to separate P. rostratus and P. tullbergi, because of considerable overlap in the ranges of each variable. A good discrimination between the two species was obtained by means of craniometrical multivariate statistics, several rostrum measurements being significantly lower in P. tullbergi than in P. rostratus. Discrepancies between our results and former published studies are hypothesized to be due to differences between the variables used and/or the geographical areas covered.

A new genus of calcareous sponge discovered in the Caribbean Sea: Bidderia gen. nov. (Porifera, Calcarea, Calcinea)

Zootaxa ◽  
2018 ◽  
Vol 4526 (1) ◽  
pp. 56
Author(s):  
MATHEUS V. LOPES ◽  
BÁSLAVI CÓNDOR-LUJÁN ◽  
FERNANDA AZEVEDO ◽  
THIERRY PÉREZ ◽  
MICHELLE KLAUTAU
Keyword(s):  
Type Species ◽  
New Genus ◽  
Caribbean Sea ◽  
Lesser Antilles ◽  
Molecular Analyses ◽  
Calcareous Sponges ◽  
Calcareous Sponge ◽  
The Caribbean ◽  
New Discovery

Calcareous sponges from the Lesser Antilles were recently inventoried and several specimens morphologically resembling species of the genus Ascoleucetta were collected. Morphological and molecular (C-LSU and ITS) analyses indicated that these specimens from the Lesser Antilles constituted a new genus. They lack the conspicuous and very characteristic ornamentation of the inhalant apertures found in two out of three species of Ascoleucetta, including the type species A. compressa. In the molecular analyses, the specimens clustered as an independent lineage, distant from the clade of A. compressa. Based on these results, we decided to erect a new genus, Bidderia gen. nov., whose type species is Bidderia bicolora gen. nov. sp. nov. Considering this new discovery, we are proposing to transfer the species A. amitsba to the genus Bidderia gen. nov. and to rediagnose Ascoleucetta. 

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