scholarly journals Integrative systematics and ecology of a new deep-sea family of tanaidacean crustaceans

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Magdalena Błażewicz ◽  
Piotr Jóźwiak ◽  
Robert M. Jennings ◽  
Maciej Studzian ◽  
Inmaculada Frutos
Keyword(s):  
Principal Component Analysis ◽  
Deep Sea ◽  
Type Species ◽  
Principal Component ◽  
Bathymetric Distribution ◽  
Incertae Sedis ◽  
New Family ◽  
Molecular Phylogenetic ◽  
Integrative Systematics ◽  
Family Classification

AbstractA new family of paratanaoidean Tanaidacea – Paranarthrurellidae fam. nov. – is erected to accommodate two genera without family classification (Paratanaoidea incertae sedis), namely Armatognathia Kudinova-Pasternak, 1987 and Paranarthrurella Lang, 1971. Seven new species of Paranarthrurella and two of Armatognathia are described from material taken in different deep-sea areas of the Atlantic and Pacific oceans. The type species of Paranarthrurella — P. caudata (Kudinova-Pasternak, 1965) — is redescribed based on the paratype. The genus Cheliasetosatanais Larsen and Araújo-Silva, 2014 originally classified within Colletteidae is synonymised with Paranarthrurella, and Arthrura shiinoi Kudinova-Pasternak, 1973 is transferred to Armatognathia. Amended diagnoses of Armatognathia and Paranarthrurella genera are given. Choosing characters for distinguishing and defining both genera was supported by Principal Component Analysis. Designation of the new family is supported by molecular phylogenetic analysis of COI and 18S datasets. The distribution of all species currently included in the new family was visualised and their bathymetric distribution analysed.

A new family and two new genera of calcaxonian octocoral, including a redescription of Pleurogorgia militaris (Cnidaria:Octocorallia:Chrysogorgiidae) and its placement in a new genus

2021 ◽  
Author(s):  
Stephen D. Cairns ◽  
Ralf T. S. Cordeiro ◽  
Yu Xu ◽  
Zifeng Zhan ◽  
Philip Alderslade
Keyword(s):  
Deep Sea ◽  
Type Species ◽  
New Genus ◽  
Sensu Stricto ◽  
Type Material ◽  
New Genera ◽  
New Family ◽  
Phylogenetic Reconstructions ◽  
The Family ◽  
Molecular Phylogenetic

Golden corals (chrysogorgiids sensu lato) are conspicuous components in deep-sea gorgonian assemblages. Although common, their taxonomy still conflicts with evolutionary histories, mostly due to low character availability and poor taxonomic knowledge. This is the case for the genus Pleurogorgia, which has been frequently reported in ROV surveys, dominating hard-bottoms throughout the Indo-Pacific. Herein, molecular phylogenetic reconstructions based on mitochondrial and nuclear datasets, and examination of new and old type material led us to suggest new systematic arrangements for some of the genera. We create a new genus, Ramuligorgia, to accommodate Pleurogorgia militaris, redescribing it as Ramuligorgia militaris comb. nov. within the family Chrysogorgiidae sensu stricto. Additionally, we describe Aurogorgia tasmaniensis gen. nov. et sp. nov., including it and the type species, Pleurogorgia plana, within Pleurogorgiidae fam. nov.

scholarly journals Taxonomy of the apicomplexan symbionts of coral, including Corallicolida ord. nov., reassignment of the genus Gemmocystis, and description of new species Corallicola aquarius gen. nov. sp. nov. and Anthozoaphila gnarlus gen. nov. sp. nov

2020 ◽  
Author(s):  
Waldan K. Kwong ◽  
Nicholas A.T. Irwin ◽  
Varsha Mathur ◽  
Ina Na ◽  
Noriko Okomoto ◽  
...  
Keyword(s):  
Type Species ◽  
Phylogenetic Analyses ◽  
Mitochondrial Protein ◽  
Molecular Data ◽  
New Order ◽  
Coral Host ◽  
Incertae Sedis ◽  
Molecular Phylogenetic ◽  
Formal Taxonomy ◽  
Dendrogyra Cylindrus

Corals (Metazoa; Cnidaria; Anthozoa) have recently been shown to play host to a widespread and diverse group of intracellular symbionts of the phylum Apicomplexa. These symbionts, colloquially called ‘corallicolids’, are mostly known through molecular analyses, and no formal taxonomy has been proposed. Another apicomplexan, Gemmocystis cylindrus (described from the coral Dendrogyra cylindrus), may be related to corallicolids, but lacks molecular data. Here, we isolate and describe motile trophozoite (feeding) corallicolids cells using microscopic (light, SEM, and TEM) and molecular phylogenetic analysis to provide the basis for a formal description. Phylogenetic analyses using nuclear and plastid rRNA operons, and three mitochondrial protein sequences derived from single cell transcriptomes, all confirm that these organisms fall into a discrete deep-branching clade within the Apicomplexa not closely related to any known species or major subgroup. As a result, we assign this clade to a new order, Corallicolida ord. nov., and family, Corallicolidae fam. nov. We describe a type species, Corallicola aquarius gen. nov. sp. nov. from its Rhodactis sp. host, and also describe a second species, Anthozoaphila gnarlus gen. nov. sp. nov., from the coral host Madracis mirabilis. Finally, we propose reassigning the incertae sedis taxon G. cylindrus from the order Agamococcidiorida to the Corallicolida, based on similarities in morphology and host localization to that of the corallicolids.

On Mesozoic laetmogonid sea cucumbers (Echinodermata: Holothuroidea: Elasipodida)*

Zoosymposia ◽  
2012 ◽  
Vol 7 (1) ◽  
pp. 185-212
Author(s):  
MIKE REICH
Keyword(s):  
New Species ◽  
Fossil Record ◽  
Type Species ◽  
New Genera ◽  
Sea Cucumbers ◽  
Incertae Sedis ◽  
New Family ◽  
Taxonomic Changes ◽  
Group Members ◽  
Three New Species

A comparative systematic survey of fossil Mesozoic laetmogonid sea cucumbers (Elasipodida) and their relatives is presented. A re-examination of the fossil record shows that only 13 fossil taxa can be recognised as belonging to this group. Four further known ‘laetmogonid’ taxa can be regarded as incertae sedis. An analysis of the results supports the following taxonomic changes. Palaeocaudinidae Boczarowski, 2001 represents a junior synonym of the Laetmogonidae Ekman, 1926. The subfamily Staurocaudininae Boczarowski, 1997 is restricted to the type species of Staurocaudina. The new family Palaeolaetmogonidae comprises probable stem group members of the Laetmogonidae. Three new species (Palaeocaudina rugia, Priscolaetmogone oloughlini, Palaeolaetmogone frankwiesei) are described from Late Cretaceous sediments of Europe. Two new genera (Palaeolaetmogone, Priscolaetmogone) are erected. The geographic distribution and phylogenetic relationships of Mesozoic and Cenozoic laetmogonid holothurians are analysed and discussed.

Sex difference in liver-oil concentration in the deep-sea shark, Centroscymnus coelolepis

2002 ◽  
Vol 53 (5) ◽  
pp. 883 ◽  
Author(s):  
Margarita Hernández-Pérez ◽  
Rosa M. Rabanal Gallego ◽  
Mª José González Carlos
Keyword(s):  
Principal Component Analysis ◽  
Atlantic Ocean ◽  
Deep Sea ◽  
Canary Island ◽  
Economic Value ◽  
Principal Component ◽  
North African ◽  
The North ◽  
Oil Concentration ◽  
African Atlantic

Percentages of liver oil, squalene in oil and squalene in liver from fifty-seven individuals of Centroscymnus coelolepis, a deep-sea shark from the North African Atlantic Ocean near Tenerife (Canary Island), were measured. The percentages were in the range of 46.9–93.9 for liver oil, 35.5–62.2 for squalene in oil and 21.5–48.5 for squalene in liver. The liver-oil and squalene contents were related to the sex, maturity, size and catch depth of the sharks. Sex had a clear influence on the concentration of squalene levels found. Samples separated into two groups, according to their sex, when principal component analysis (PCA) was applied. Centroscymnus coelolepis males have greater economic value than females because they are easier to capture and have the highest squalene content.Resumen. Se han medido los porcentajes de aceite y escualeno contenidos en el hígado de 57 tiburones del género Centroscymnus coelolepis, capturados en aguas profundas del Océano Atlántico, cerca de Tenerife (Islas Canarias). Los porcentajes oscilaron entre 46.9 y 83.9 de aceite en hígado; 37.5 y 62.2 de escualeno en aceite y 21.5 y 48.5 de escualeno en hígado. Se ha relacionado el sexo, la madurez, tama�o y profundidad de pesca de los tiburones con el contenido en aceite y escualeno. Los resultados han mostrado que el sexo tiene una clara influencia en la proporción de este último. Cuando se aplicó el análisis de componentes principales (PCA), las muestras se separaron en dos grupos de acuerdo con su sexo.

scholarly journals A revision of the Pheroliodidae, fam. n. (Acari: Oribatei)

1986 ◽  
Vol 3 (6) ◽  
pp. 357-384 ◽  
Author(s):  
Adilson D. Paschoal
Keyword(s):  
New Zealand ◽  
Type Species ◽  
New Guinea ◽  
Sao Paulo ◽  
São Paulo ◽  
Incertae Sedis ◽  
New Family

The new family Pheroliodidae, herei nproposed, includes the following genera and species Pheroliodes Grandjean (in whose synonymy Pedrocortesia Hammer is placed), with the species: casa-branquensis, sp. n. (Brazil, São Paulo, Casa Branca), pellitus, sp. n. (Brazil, São Paulo, Piracicaba), nemoricultricis, sp. n. (Brazil, São Paulo, Piracicaba), wehnekei (Willmann) (Guatemala, Venezuela), roblensis Covarrubias (Chile), mirabilis (Hammer), n. comb. (Argentina): Pedrocortesia elegans Hammer, P. intermedia Hammer, both from Peru, P. fissurata Balogh & Mahunka and P. inaequalis Balogh & Mahunka, both from Mongolia, P. franzi Balogh (Chad), P. africana Balogh (Kenya), P. vermicularis Balogh (New Guinea) and P. sculptrata Aoki (Corea) are considered incertae sedis; Lopholiodes, gen. n., includes the species micropunctinatum, sp. n., the type-species (Brazil, São Paulo, Anhumas) and macropunctinatum, sp. n. (Brazil, São Paulo, Piracicaba): Octoliodes, gen n., includes the species leuteomarginatus (Hammer), n. comb., the type-species (New ealand) and rotoruensis (Hammer), n. comb. (New Zealand): and Licnoliodes Grandjean, with the species: andrei Grandjean, type-species (Spain and Algeria), adminensis Grandjean, type-species (Spain and Algeria), adminensis Grandjean (Maroc, Algeria, Spain) and apunctatus Mahunka (Greece).

Scanning x-ray fluorescence microscopy and principal component analysis

1992 ◽  
Vol 50 (2) ◽  
pp. 1752-1753
Author(s):  
Brian Cross
Keyword(s):  
Principal Component Analysis ◽  
Fluorescence Microscopy ◽  
Spatial Resolution ◽  
High Speed ◽  
Image Acquisition ◽  
Principal Component ◽  
Fluorescence Microscope ◽  
Acquisition Rate ◽  
X Ray ◽  
Speed Up

A relatively new entry, in the field of microscopy, is the Scanning X-Ray Fluorescence Microscope (SXRFM). Using this type of instrument (e.g. Kevex Omicron X-ray Microprobe), one can obtain multiple elemental x-ray images, from the analysis of materials which show heterogeneity. The SXRFM obtains images by collimating an x-ray beam (e.g. 100 μm diameter), and then scanning the sample with a high-speed x-y stage. To speed up the image acquisition, data is acquired "on-the-fly" by slew-scanning the stage along the x-axis, like a TV or SEM scan. To reduce the overhead from "fly-back," the images can be acquired by bi-directional scanning of the x-axis. This results in very little overhead with the re-positioning of the sample stage. The image acquisition rate is dominated by the x-ray acquisition rate. Therefore, the total x-ray image acquisition rate, using the SXRFM, is very comparable to an SEM. Although the x-ray spatial resolution of the SXRFM is worse than an SEM (say 100 vs. 2 μm), there are several other advantages.

A German version of the Intermittent Claudication Questionnaire (ICQ): cultural adaptation and validation

VASA ◽  
2012 ◽  
Vol 41 (5) ◽  
pp. 333-342 ◽  
Author(s):  
Kirchberger ◽  
Finger ◽  
Müller-Bühl
Keyword(s):  
Principal Component Analysis ◽  
Intermittent Claudication ◽  
Completion Time ◽  
Short Form ◽  
Principal Component ◽  
Component Analysis ◽  
German Version ◽  
Average Completion Time ◽  
Sf 36 ◽  
Related Quality

Background: The Intermittent Claudication Questionnaire (ICQ) is a short questionnaire for the assessment of health-related quality of life (HRQOL) in patients with intermittent claudication (IC). The objective of this study was to translate the ICQ into German and to investigate the psychometric properties of the German ICQ version in patients with IC. Patients and methods: The original English version was translated using a forward-backward method. The resulting German version was reviewed by the author of the original version and an experienced clinician. Finally, it was tested for clarity with 5 German patients with IC. A sample of 81 patients were administered the German ICQ. The sample consisted of 58.0 % male patients with a median age of 71 years and a median IC duration of 36 months. Test of feasibility included completeness of questionnaires, completion time, and ratings of clarity, length and relevance. Reliability was assessed through a retest in 13 patients at 14 days, and analysis of Cronbach’s alpha for internal consistency. Construct validity was investigated using principal component analysis. Concurrent validity was assessed by correlating the ICQ scores with the Short Form 36 Health Survey (SF-36) as well as clinical measures. Results: The ICQ was completely filled in by 73 subjects (90.1 %) with an average completion time of 6.3 minutes. Cronbach’s alpha coefficient reached 0.75. Intra-class correlation for test-retest reliability was r = 0.88. Principal component analysis resulted in a 3 factor solution. The first factor explained 51.5 of the total variation and all items had loadings of at least 0.65 on it. The ICQ was significantly associated with the SF-36 and treadmill-walking distances whereas no association was found for resting ABPI. Conclusions: The German version of the ICQ demonstrated good feasibility, satisfactory reliability and good validity. Responsiveness should be investigated in further validation studies.

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