scholarly journals Stauroneis kingstonii sp. nov. (Bacillariophyta: Naviculales), a new diatom species from the Black Swamp, Arkansas, USA

Phytotaxa ◽  
2015 ◽  
Vol 205 (3) ◽  
pp. 177 ◽  
Author(s):  
DAVID R. L. BURGE ◽  
TRAVIS D. MARSICO ◽  
MARK B. EDLUND
Keyword(s):  
Tree Bark ◽  
Diatom Species ◽  
Cache River ◽  
River Watershed ◽  
Brackish Waters ◽  
Bald Cypress ◽  
Water Tupelo ◽  
Freshwater Diatom

A freshwater diatom species, Stauroneis kingstonii sp. nov., is described from cypress-tupelo wetlands of the Cache River, Arkansas, USA. Stauroneis kingstonii can be distinguished from other Stauroneis species by its narrow lanceolate shape, high length:breadth ratio, coarse areolae and striae, and lateral raphe bounded by a broad axial area and straight proximal raphe ends. The diatom is currently known only from the Cache River Watershed and found living benthic or epiphytic on submerged bald cypress and water tupelo tree bark, in slightly acidic, and fresh to slightly brackish waters.

Watershed Planning: Pseudo-democracy and its Alternatives – The Case of the Cache River Watershed, Illinois

2005 ◽  
Vol 22 (3) ◽  
pp. 327-338 ◽  
Author(s):  
Jane Adams ◽  
Steven Kraft ◽  
J. B. Ruhl ◽  
Christopher Lant ◽  
Tim Loftus ◽  
...  
Keyword(s):  
Watershed Planning ◽  
Cache River ◽  
River Watershed

scholarly journals Distrionella coxiana, a new fragilarioid diatom species (Bacillariophyceae) from Tierra del Fuego, Patagonia, Argentina

2019 ◽  
Vol 152 (2) ◽  
pp. 385-391
Author(s):  
Valeria Casa ◽  
Gabriela Mataloni ◽  
Bart Van de Vijver
Keyword(s):  
Typical Feature ◽  
Morphological Features ◽  
Tierra Del Fuego ◽  
New Taxon ◽  
Diatom Species ◽  
Unique Combination ◽  
Diatom Flora ◽  
Electron Microscopical ◽  
Scanning Electron ◽  
Freshwater Diatom

Background and aims – A few years ago, a new survey started of the freshwater diatom flora from peatbogs of Tierra del Fuego (southern Argentina). During this survey, an unknown fragilarioid diatom belonging to the genus Distrionella that could not be identified using the currently available literature was discovered. Methods – Using both Light Microscopical and Scanning Electron Microscopical techniques, the morphology of the unknown Distrionella species has been analysed. The new taxon is properly described, illustrated and compared with all other possible similar Distrionella taxa, known worldwide. Key results – Distrionella coxiana possesses a unique combination of morphological features that excludes conspecificity with all other members of the genus; it is characterized in having narrow, linear valves with small, capitate apices. Transapical ribs, a typical feature of the genus Distrionella, are only weakly developed. One rimoportula is observed close to the apices. Both apices have well-developed apical porefields. The girdle bands bear one complete row of poroids often accompanied by a second, incomplete row of small poroids. Notes on the occurrence and ecology of the new taxon are added.

Hydrochory and Regeneration in A Bald Cypress-Water Tupelo Swamp Forest

Ecology ◽  
1988 ◽  
Vol 69 (4) ◽  
pp. 1055-1063 ◽  
Author(s):  
Rebecca L. Schneider ◽  
Rebecca R. Sharitz
Keyword(s):  
Swamp Forest ◽  
Bald Cypress ◽  
Water Tupelo

Encyonema aquasedis sp. nov. and Kurtkrammeria salesopolensis sp. nov.: two new freshwater diatom species (Cymbellales, Bacillariophyceae) from an oligotrophic reservoir in southeastern Brazil

Phytotaxa ◽  
2016 ◽  
Vol 247 (1) ◽  
pp. 62 ◽  
Author(s):  
Gisele Carolina Marquardt ◽  
Angélica Cristina Righetii Da Rocha ◽  
Carlos Eduardo Wetzel ◽  
Luc Ector ◽  
Carlos Eduardo de Mattos Bicudo
Keyword(s):  
New Species ◽  
Surface Sediments ◽  
Low Ph ◽  
Southeastern Brazil ◽  
Diatom Species ◽  
Southeast Brazil ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes ◽  
Scanning Electron ◽  
Freshwater Diatom

Recent research of the plankton and the surface sediments from Ribeirão do Campo reservoir (São Paulo, southeast Brazil) led to identification of two new cymbelloid diatom species: Encyonema acquasedis sp. nov. and Kurtkrammeria salesopolensis sp. nov. Their morphology was studied under both light and scanning electron microscopes aiming at describing the two species in detail. The morphology of each species is compared and discussed with morphologically similar taxa. The new species are different from all others in the Cymbellales due to a combination of characteristics including valve outline, striae, areolae structure, and raphe system. Both species were collected from an oligotrophic environment with both low pH and conductivity.

scholarly journals Fragilaria rinoi sp. nov. (Fragilariales, Fragilariophyceae) from periphytic river samples in Central Portugal

2016 ◽  
Author(s):  
Cristina Delgado ◽  
M. Helena Novais ◽  
Saúl Blanco ◽  
Salomé F.P. Almeida
Keyword(s):  
Central Area ◽  
River Basins ◽  
Scanning Electron Micrographs ◽  
Diatom Species ◽  
Alkaline Ph ◽  
Mean Values ◽  
Central Portugal ◽  
Lis River ◽  
Scanning Electron ◽  
Freshwater Diatom

A new benthic freshwater diatom, Fragilaria rinoi Almeida & C.Delgado sp. nov., is described from river periphyton samples in Portugal. Fragilaria rinoi sp. nov. is illustrated and discussed based on populations collected from the Vouga, Mondego and Lis river basins in central Portugal and compared with the type material of Fragilaria vaucheriae (Kütz.) J.B.Petersen. The morphological features of the new diatom species are documented through light and scanning electron micrographs, including a comparative analysis with related species of the genus (F. candidagilae Almeida, C.Delgado, Novais & S.Blanco, F. intermedia Grunow in Van Heurck, F. neointermedia Tuji & D.M.Williams, F. recapitellata Lange-Bert. & Metzeltin, F. perminuta (Grunow) Lange-Bert., F. vaucheriae and F. microvaucheriae C.E.Wetzel & Ector). Fragilaria rinoi sp. nov. is characterized by solitary cells without spines, lanceolate valves with slightly rostrate apices, a narrow, linear axial area, and a large, unilateral central area. Fragilaria rinoi sp. nov. may be confused with F. microvaucheriae in terms of length, striae density and outline, although a morphometric analysis revealed that F. rinoi sp. nov. is significantly wider. Fragilaria rinoi sp. nov. is present in rivers with high dissolved oxygen concentrations, medium to high conductivity, neutral to slightly alkaline pH and high mean values of nitrates and ammonium.

Navicula daochengensis sp. nov., a new freshwater diatom species (Bacillariophyceae) from a small mountain lake, Sichuan Province, China

Phytotaxa ◽  
2020 ◽  
Vol 439 (2) ◽  
pp. 150-158
Author(s):  
TING WANG ◽  
JIA-LIN WANG ◽  
QI-CHAO ZHOU ◽  
DMITRY A. CHUDAEV ◽  
J. P. KOCIOLEK ◽  
...  
Keyword(s):  
New Species ◽  
Nature Reserve ◽  
Sichuan Province ◽  
Mountain Lake ◽  
Morphological Description ◽  
Similar Species ◽  
Scanning Electron Micrographs ◽  
Diatom Species ◽  
Scanning Electron ◽  
Freshwater Diatom

In this study, we describe a new freshwater diatom, Navicula daochengensis sp. nov., which was found in a small mountain lake, Lake Congqiancuo, Haizishan Nature Reserve, Daocheng County, Sichuan Province, China. The detailed morphological description of the new species is provided from light and scanning electron micrographs. Navicula daochengensis has a narrowly lanceolate valve outline with broadly-rounded ends. The striate are radiate and convergent to the apices. This new species is compared with similar species, such as Navicula elongata, N. venerablis, N. moralesii and N. radiosa, which differ in size, valve shape, striae density and ultrastructure.

scholarly journals On the factors affecting distributions of freshwater diatom species in a remote South Atlantic archipelago

2012 ◽  
Vol 47 (3) ◽  
pp. 291-309 ◽  
Author(s):  
Roger J. Flower ◽  
Martin Kernan ◽  
Phillipa E. Noon ◽  
Vivienne J. Jones
Keyword(s):  
South Atlantic ◽  
Diatom Species ◽  
Factors Affecting ◽  
Freshwater Diatom
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