Benthic-epiphytic dinoflagellates from the northern portion of the Mesoamerican Reef System

2015 ◽  
Vol 58 (2) ◽  
pp. 115-128
Author(s):  
Antonio Almazán-Becerril ◽  
Sergio Escobar-Morales ◽  
Gabriela Rosiles-González ◽  
Francisco Valadez
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Records ◽  
Quintana Roo ◽  
Reef System ◽  
Sampling Locations ◽  
Mexican Caribbean ◽  
Northern Portion ◽  
Protected Natural Areas ◽  
Scanning Electron

Abstract In 2010, we surveyed 42 sampling locations at 11 sites along the Mexican part of the Mesoamerican Reef System, including eight protected natural areas of the coastal state of Quintana Roo, to determine the richness of benthic-epiphytic dinoflagellates in the area. At each site, the host macroalgae of the genera Dictyota, Halimeda, Laurencia, Sargassum, and Stypopodium were manually collected. A total of 383 samples were analyzed microscopically using transmitted light, epifluorescence with calcofluor staining, and scanning electron microscopy. A total of 24 dinoflagellate species distributed among the genera Amphidinium, Bysmatrum, Coolia, Gambierdiscus, Ostreopsis, Prorocentrum, Plagiodinium, and Sinophysis were identified. Prorocentrum is the most diverse genus in the benthic-epiphytic environment with 13 species. This work also includes 15 new records of species from the Mexican Caribbean.

Free-living marine planktonic unarmoured dinoflagellates from the Gulf of Mexico and the Mexican Pacific

2015 ◽  
Vol 58 (1) ◽  
Author(s):  
Sergio Escobar-Morales ◽  
David U. Hernández-Becerril
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Gulf Of Mexico ◽  
Species Composition ◽  
New Records ◽  
Morphological Characters ◽  
Phylogenetic Group ◽  
Free Living ◽  
Mexican Pacific ◽  
Scanning Electron

AbstractThe so-called unarmoured dinoflagellates are not a “natural” (phylogenetic) group but they lack thecal plates, share fragility and possess relatively few morphological characters that can be positively identified. This study depicts the species composition of unarmoured dinoflagellates collected from sites along the coasts of the Gulf of Mexico and the Mexican Pacific and includes their descriptions and illustrations. We identified a total of 25 species belonging to 13 genera and six families that were studied through various techniques using light and scanning electron microscopy. Seven new records for the Mexican Pacific are annotated here that include

New diagnostic characters for Amphiodia and Ophiophragmus (Amphiuridae, Ophiuroidea, Echinodermata)

2020 ◽  
Vol 100 (5) ◽  
pp. 759-781
Author(s):  
Gisella C.S. Chagas ◽  
Renata A.S. Alitto ◽  
Helena Serrano ◽  
Gabriela Granadier ◽  
Pablo D.B. Guilherme ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Records ◽  
External Morphology ◽  
Diagnostic Characters ◽  
Comparative Analyses ◽  
Phylogenetic Studies ◽  
New Information ◽  
Taxonomic Studies ◽  
Scanning Electron

AbstractThe genera Ophiophragmus and Amphiodia are amphiurids that are considered taxonomically difficult due to their great resemblance, few diagnostic characters and synonymy problems. Our aim is to redescribe the species using scanning electron microscopy and morphometry of diagnostic structures, and to provide new information for the identification of these Ophiuroidea. Five Amphiodia spp. and six Ophiophragmus spp. recorded in Brazil were rigorously redescribed. The descriptions include new diagnostic characters derived from external morphology, arm microstructures and morphometry. We also provided comparative analyses of species with shared characters such as Amphiodia riisei and Amphiodia trychna. The geographic and bathymetric distributions of the studied species were updated, and new records are provided. All the information presented may be used in taxonomic, ecological and phylogenetic studies, helping to fill gaps in the knowledge of the biodiversity, ecology and evolution of these Ophiuroidea. Conclusively, all the tools applied here assisted in the identification of genera and species and could be useful in other taxonomic studies of Echinodermata.

New records of Didymium inconspicuum , D. karstensii , and D. rugulosporum from China

Mycotaxon ◽  
2020 ◽  
Vol 134 (4) ◽  
pp. 643-648
Author(s):  
Chaofeng Yuan ◽  
Shu Li ◽  
Wan Wang ◽  
Shuwei Wei ◽  
Qi Wang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
New Records ◽  
Morphological Characteristics ◽  
Similar Species ◽  
Scanning Electron

Didymium inconspicuum, D. karstensii, and D. rugulosporum are reported as new records for China. Morphological characteristics were observed and described by light microscopy and scanning electron microscopy and are discussed and compared with similar species.

A review of the genus Brachysira in Ireland with the description of Brachysira praegeri and Brachysira conamarae, new raphid diatoms (Bacillariophyceae) from high status waterbodies

Phytotaxa ◽  
2017 ◽  
Vol 326 (1) ◽  
pp. 1 ◽  
Author(s):  
BRYAN KENNEDY ◽  
NORMAN ALLOTT
Keyword(s):  
Electron Microscopy ◽  
Water Quality ◽  
Scanning Electron Microscopy ◽  
New Records ◽  
Full Range ◽  
Water Quality Assessment ◽  
Algal Flora ◽  
High Status ◽  
Two New Species ◽  
Scanning Electron

The genus Brachysira is frequently encountered in the algal flora of oligotrophic freshwaters. In order to re-evaluate its diversity in Irish waters, light and scanning electron microscopy was used to examine populations at 209 river sites and in 85 lakes. The full range of morphological variation of all common and sometimes challenging Brachysira populations was investigated. The study revealed two new species, Brachysira praegeri sp. nov. and Brachysira conamarae sp. nov. and compared them to all closely related taxa. The study also recorded B. intermedia and B. neglectissima which are new records for Ireland. Further taxonomic clarification is required for a diatom resembling B. intermedia and the complex of taxa around the polymorphic B. microcephala. Individual Brachysira taxa differed with respect to their optima along an alkalinity-pH gradient, but the trophic requirements of all forms were comparable, suggesting that species may be merged for routine water quality assessment. Nevertheless, it is recommended that Brachysira morphotypes be enumerated separately until their taxonomy is more fully resolved and their significance for the biodiversity of epilithic communities has been clearly established.

Description of the female morphology of the relict troglobiont millipede Cantabrodesmus lorioli Mauriès 1971 (Diplopoda, Polydesmida, Chelodesmidae), and new records in the deepest pit of Spain

Zootaxa ◽  
2020 ◽  
Vol 4895 (3) ◽  
pp. 421-430
Author(s):  
JOSÉ D. GILGADO ◽  
JOSÉ A. NORIEGA AGUINAGA ◽  
HENRIK ENGHOFF
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Records ◽  
Small Region ◽  
Systematic Position ◽  
Northern Spain ◽  
Geographical Isolation ◽  
Relict Species ◽  
Available Information ◽  
Scanning Electron

The troglobiont millipede, Cantabrodesmus lorioli Mauriès, 1971, inhabits a few caves in a small region of Northern Spain. It is considered a relict species because of its geographical isolation compared to others in its family, and its to some extent uncertain systematic position. Cantabrodesmus lorioli has been placed in three different families, and now is considered a member of the Chelodesmidae, a family with only one other known native European representative. There are few records of this species, and almost nothing is known about its biology. The only available information on this species is the description of the male and a list of caves where it has been captured. In the present work, we provide the first description of the female morphology, illustrated by scanning electron microscopy, and a series of new records from caves in a region where it had never been captured before, including the deepest known pit in Spain, Torca del Porrón. The female morphology does not show many differences from that of the male, but several characters are discussed. All of the known information on the morphology of the species is used to discuss the implications for its biology and systematic position. 

scholarly journals New records of genera and species of myxomycetes (Amoebozoa) from the Neotropics

Check List ◽  
2018 ◽  
Vol 14 (3) ◽  
pp. 509-518
Author(s):  
Carlos Lado ◽  
Arturo Estrada-Torres ◽  
Carlos Rojas Alvarado
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Central America ◽  
New Records ◽  
Biodiversity Hotspot ◽  
Field Surveys ◽  
Microscopy Images ◽  
Scanning Electron

During field surveys of myxomycetes in Central America, 2 previously unrecorded genera and 4 species, viz. Craterium muscorum Ing, Dictydiaethalium dictyosporum Nann.-Bremek., Physarina echinocephala Höhn, and Stemonaria rufipes, were identified. Some of these are new for the Neotropics. These noteworthy range extensions of these species to the Mesoamerican biodiversity hotspot adds to our knowledge of rarely recorded myxomycetes worldwide. Images of the more relevant taxonomic characters are provided, and for some species, this is the first illustrations with macro and microphotographs and scanning electron microscopy images.

Synopsis of Melochia L. (Byttnerioideae, Malvaceae) in southeastern Brazil

Phytotaxa ◽  
2015 ◽  
Vol 226 (3) ◽  
pp. 217 ◽  
Author(s):  
Victor Martins Gonçalez ◽  
Gerleni Lopes Esteves
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Records ◽  
Conservation Status ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Southeastern Brazil ◽  
Taxonomic Treatment ◽  
Southeast Region ◽  
Scanning Electron

Melochia occurs in the Southeast Region of Brazil, comprising ten species and two varieties, which corresponds to about 50% of the Brazilian species. The genus is mainly distributed in the Cerrado. This study provides a taxonomic treatment including an identification key, illustrations, comments on morphology, habitat, geographical data and conservation status. Some species cited for the region, but not found in the present research are referenced with additional notes. Also, a new status (Melochia regnellii), a lectotypification, five new records for the Southeast Region, and a Scanning Electron Microscopy study (unpublished for the genus) are here presented.

Brittle stars (Echinodermata: Ophiuroidea) from seamounts in the Andaman Sea (Indian Ocean): first account, with descriptions of new species

2012 ◽  
Vol 92 (5) ◽  
pp. 1195-1208 ◽  
Author(s):  
Sabine Stöhr ◽  
Sabyasachi Sautya ◽  
Baban Ingole
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
New Records ◽  
Andaman Sea ◽  
Brittle Stars ◽  
The Family ◽  
Back Arc ◽  
First Time ◽  
Scanning Electron

For the first time, brittle stars were collected on two seamounts in the Andaman Back-arc Basin. Of the six species, two were new to science and are described herein as Ophioleuce longispinum sp. nov. and Ophiophyllum minimum sp. nov., in the family Ophiuridae, subfamilies Ophioleucinae and Ophiurinae, respectively. Skeletal details were studied and documented by scanning electron microscopy. Morphological similarities between related species are discussed in detail. Ophioleuce longispinum sp. nov. is particularly interesting, because it combines characters typical for its genus with those otherwise only known from Ophiophyllum, such as a limpet-like disc, a fringe of marginal disc papillae or spines, and a paddle-like modified lower arm spine. The remaining species, Astrophiura cf. tiki, Ophiactis perplexa, Ophiolimna antarctica and an unidentified Ophiura, are new records for the Andaman Sea.

Coral reef inhabiting tubeworms (Polychaeta: Serpulidae) from Enewetak, Kwajalein, Rongelap and Utirik Atolls, Marshall Islands

2012 ◽  
Vol 92 (5) ◽  
pp. 967-988
Author(s):  
Julie H. Bailey-Brock ◽  
Wagner F. Magalhães ◽  
Richard E. Brock
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Coral Reef ◽  
New Records ◽  
Marshall Islands ◽  
Sampling Effort ◽  
Line Drawings ◽  
Enewetak Atoll ◽  
Scanning Electron

The coral reef inhabiting tubeworms from the Marshall Islands have been studied by few authors mainly by samplings in Enewetak Atoll. We report several new records of serpuline and spirorbine tubeworms from Enewetak Atoll as well as from Kwajalein, Utirik and Rongelap Atolls. Twenty-one species of Serpulinae and seven species of Spirorbinae are described and illustrated with line drawings, colour and/or scanning electron microscopy photographs.Neodexiospira turritanom. nov. is proposed to replaceNeodexiospira preacuta. Enewetak Atoll still represents the most species-rich atoll in the Marshall Islands but this is most likely the result of a greater sampling effort in this atoll for the last few decades.

scholarly journals On the Occurrence of Four Diatom Taxa from Eastern India with a Taxonomic Note

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Jai Prakash Keshri ◽  
Amit K. Ghosh ◽  
Surajit Roy
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
West Bengal ◽  
New Records ◽  
Eastern India ◽  
Taxonomic Note ◽  
Scanning Electron

Diatoms were collected from the Kotulpur area of West Bengal. Four diatom taxa, namely, Eunotia minor (Kützing) Grunow, Achnanthidium minutissimum (Kützing) Czarnecki, Lemnicola hungarica (Grunow) Round and Basson, and Navicula radiosa Kützing were observed using scanning electron microscopy (SEM) and identified in light of modern diatom taxonomic trends. Except Eunotia minor, all these taxa are new records to Eastern India. A note on the taxonomy of Achnanthes pseudobiasolletiana as described by Gandhi and Eunotia serrata var. diadema (Ehr.) R. M. Patrick as reported by Dwivedi and Misra has been added.

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