Encyonema chebalingense sp. nov., a new freshwater diatom species (Cymbellales, Bacillariophyceae) from Guangdong Province, China

Phytotaxa ◽  
2021 ◽  
Vol 508 (1) ◽  
Author(s):  
RUOHAN HUANG ◽  
JIN MA ◽  
XIANYUN WANG ◽  
SAÚL BLANCO ◽  
JOHN PATRICK KOCIOLEK ◽  
...  
Keyword(s):  
New Species ◽  
Central Area ◽  
Guangdong Province ◽  
Ventral Side ◽  
Morphological Description ◽  
Similar Species ◽  
Dorsal Margin ◽  
Nature Preserve ◽  
Valve Structure ◽  
Freshwater Diatom

During a survey of freshwater diatoms from Mojiang River, Chebaling Nature Preserve in Shaoguan City, Shixing County, Guangdong Province, China, a new Encyonema species, Encyonema chebalingense sp. nov., was discovered. Based on observations with light and scanning electron microscopy, a detailed morphological description of E. chebalingense is here presented. The main features of E. chebalingense include: conspicuously asymmetrical and dorsiventral, semielliptical to semielliptical–lanceolate valves, with a filiform raphe; dorsal margin clearly arched and ventral margin nearly straight or slightly concave; central area on the ventral side formed by 1–2 shorter central striae; and short tectullae projecting within the striae. The new species was compared with some similar species, all of which show similarities to E. chebalingense but differ in features such as dimensions, internal valve structure, stria density and valve shape. This genus is common and abundant in relatively clean waters, and other new species most likely will be recorded in the future from China.

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

Phytotaxa ◽  
2019 ◽  
Vol 404 (1) ◽  
pp. 12 ◽  
Author(s):  
WEI ZHANG ◽  
TING WANG ◽  
ZLATKO LEVKOV ◽  
INGRID JÜTTNER ◽  
LUC ECTOR ◽  
...  
Keyword(s):  
New Species ◽  
Nature Reserve ◽  
Sichuan Province ◽  
Mountain Lake ◽  
Morphological Description ◽  
Similar Species ◽  
Dorsal Margin ◽  
Diatom Species ◽  
Freshwater Diatoms ◽  
Freshwater Diatom

During a survey of freshwater diatoms from a mountain lake, Lake Congqiancuo, Haizishan Nature Reserve, Yading, Daocheng County, Sichuan Province, China, a new Halamphora species, Halamphora daochengensis sp. nov. was found. A detailed morphological description of the new species is presented, based on light and scanning electron microscopy. The main features of H. daochengensis are dorsiventral, semi-lanceolate valves with a strongly triundulate dorsal margin and valve ends distinctly protracted and capitate. The new species is compared with other similar species including Halamphora dusenii and H. normanii var. undulata which differ in size, valve shape, stria density and ultrastructure.

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.

Oricymba xianjuensis sp. nov., a new freshwater diatom (Bacillariophyceae) from Xianju National Park (Zhejiang Province, China)

Phytotaxa ◽  
2016 ◽  
Vol 272 (2) ◽  
pp. 134 ◽  
Author(s):  
WEI ZHANG ◽  
XIN QI ◽  
J. PATRICK KOCIOLEK ◽  
LI-QING WANG ◽  
RUI-LEI ZHANG
Keyword(s):  
New Species ◽  
National Park ◽  
Zhejiang Province ◽  
Morphological Description ◽  
Similar Species ◽  
Ventral Margin ◽  
Apical Pore ◽  
Freshwater Diatoms ◽  
Scanning Electron ◽  
Freshwater Diatom

During a survey of freshwater diatoms from streams in the Xianju National Park, Zhejiang Province, China, a new cymbelloid species, Oricymba xianjuensis sp. nov. has been recorded. This species is assigned to the genus Oricymba by virtue of having a ridge separating the valve face and mantle, the presence of apical pore fields, and areolar openings with dentate occlusions. A detailed morphological description of the new species O. xianjuensis is presented, based on light and scanning electron microscopy. Oricymba xianjuensis sp. nov. is characterized by having a ridge along the valve face, as well as a linear-lanceolate outline with a moderately gibbous central portion gradually tapering towards the round, slightly protracted poles, a slightly lateral raphe with widened proximal endings and strongly deflected distal endings, and radiate striae. The taxon is morphologically compared with similar species of the genus Oricymba. The new species looks most similar to O. latirotundata, but is separated from this species by having more narrow, linear valves and a more tumid ventral margin. These findings add to our understanding the morphology and distribution of the genus Oricymba in China.

Cyclotella deceusteriana, a new centric diatom species (Bacillariophyta) from the sub-Antarctic Region

Phytotaxa ◽  
2018 ◽  
Vol 333 (1) ◽  
pp. 108 ◽  
Author(s):  
BART VAN DE VIJVER ◽  
STEVEN DESSEIN
Keyword(s):  
New Species ◽  
Morphological Analysis ◽  
Central Area ◽  
Centric Diatom ◽  
New Taxon ◽  
Antarctic Region ◽  
Distribution And Ecology ◽  
Electron Microscopical ◽  
A New Species ◽  
Freshwater Diatom

During a survey of the freshwater diatom flora of the sub-Antarctic region (Iles Kerguelen and Iles Crozet) in the southern Indian Ocean, an unknown Cyclotella taxon was observed that was formerly identified as the presumed cosmopolitan C. meneghinana. Detailed morphological analysis based on light and scanning electron microscopical observations and comparison with several similar Cyclotella taxa worldwide justified the description of this unknown taxon as a new species: Cyclotella deceusteriana sp. nov. The new taxon is characterized by the presence of marginal fultoportulae on every costa, hyaline furrows between the raised marginal parts on which the striae are located, 2, occasionally 1, 3 or 4 central fultoportulae and an entirely flat, smooth, relatively small central area. The new species is described and compared with other Cyclotella taxa. Notes on its distribution and ecology are added.

Four new species of monoraphid diatoms from Western Sichuan Plateau in China

Phytotaxa ◽  
2021 ◽  
Vol 479 (3) ◽  
pp. 257-274
Author(s):  
Q.M. YOU ◽  
K. ZHAO ◽  
Y.L. WANG ◽  
P. YU ◽  
J.P. KOCIOLEK ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
New Species ◽  
Central Area ◽  
Morphological Characteristics ◽  
Similar Species ◽  
Small Species ◽  
Western Sichuan ◽  
The Relationship ◽  
Scanning Electron ◽  
Apical Axis

Four new monoraphid diatoms are examined and described from a high-altitude (> 3000 m) region of western Sichuan, China.  The descriptions are based on light and scanning electron microscopy observations, and the four new species are compared with similar taxa worldwide.  Achnanthidium sichuanense sp. nov. has small, lanceolate-elliptical valves, with rounded apices. The outline and central area differentiate it from similar species.  The unique characteristic of Eucocconeis undulatum sp. nov. is that it has valves that are undulate along the apical axis, forming an “H”-shaped area on both raphe and rapheless valves as seen in light microscope (LM).  Platessa mugecuonesis sp. nov. and Platessa lanceolata sp. nov. are two small species, whose valve outlines and central areas make them different from other species in this genus.  A. sichuanense sp. nov. and E. undulatum sp. nov. are discussed in terms of the relationship between “Achnanthidium & Psammothidium” and “Eucocconeis & Psammothidium”, as these genera are difficult to separate according to morphological characteristics.

A new species of Gymnopus sect. Androsacei (Omphalotaceae, Agaricales) from China

Phytotaxa ◽  
2021 ◽  
Vol 521 (1) ◽  
pp. 1-14
Author(s):  
JI-PENG LI ◽  
BIN SONG ◽  
ZHAN FENG ◽  
JING WANG ◽  
CHUN-YING DENG ◽  
...  
Keyword(s):  
New Species ◽  
Phylogenetic Analyses ◽  
Morphological Description ◽  
Similar Species ◽  
Line Drawings ◽  
Pale Yellow ◽  
Molecular Phylogenetic ◽  
A New Species

A new species of Gymnopus sect. Androsacei, namely, G. pallipes is described and illustrated based on morphological and molecular phylogenetic evidence. It is characterized by marasmioid basidiomata, a dark brown to reddish brown pileus becoming dull white to yellowish grey with age, whitish to pale yellow stipe and presence of rhizomorphs. Phylogenetic analyses support it as a new species within Gymnopus sect. Androsacei. The detailed morphological description, colour photos of basidiomata, and line drawings of microcharacters are presented and delimitation characters from similar species are discussed. A key to the known species of Gymnopus s. str. from China is also provided.

Hysterionica chamomilloides (Asteraceae: Astereae) a new species from the grassland ecosystem of Río de La Plata

Phytotaxa ◽  
2021 ◽  
Vol 482 (1) ◽  
pp. 36-44
Author(s):  
LEONARDO PAZ DEBLE
Keyword(s):  
New Species ◽  
Conservation Status ◽  
Morphological Description ◽  
Similar Species ◽  
South American ◽  
Review Of Literature ◽  
South American Species ◽  
Field Surveys ◽  
Mountainous Regions ◽  
A New Species

Hysterionica s.l. (including Neja) comprises ca. 15 species distributed mainly in the grasslands of southern Brazil, Uruguay, central and northern Argentina and Southern Paraguay. Based on field surveys, study of nomenclatural types and other specimens, and review of literature, a new species is proposed here, Hysterionica chamomilloides, endemic of mountainous regions of northern Uruguay, and southwestern Rio Grande do Sul state, Brazil. This work provides a detailed morphological description of the new species, information on its geographic distribution, habitat, phenology, conservation status, and discusses the main differences between H. chamomilloides and the morphologically most similar species. Illustrations, images and a key to the South American species of Hysterionica are also supplied.

Protubera beijingensis sp. nov. (Protophallaceae, Phallales) from China

Phytotaxa ◽  
2018 ◽  
Vol 348 (2) ◽  
pp. 133
Author(s):  
GUOJIE LI ◽  
DEJIANG DENG ◽  
JINKANG WEI ◽  
CHULONG ZHANG ◽  
RUILIN ZHAO ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
North China ◽  
Morphological Description ◽  
Similar Species ◽  
Multigene Phylogenetic Analysis ◽  
Globally Distributed ◽  
A New Species

The genus Protubera includes gasteroid species. Its members are globally distributed in tropical, subtropical, and temperate areas, and presently, six species are recognized. In this paper, Protubera beijingensis from North China is described as a new species. Its morphological description and illustration are provided in detail and compared with morphologically similar species. A multigene phylogenetic analysis based on nLSU, atp6, and rpb2 sequences of the genus Protubera also identifies this organism as a new species within Protubera.

Aulacoseira veraluciae sp. nov. (Coscinodiscophyceae, Aulacoseiraceae): a common freshwater diatom from Brazil

Phytotaxa ◽  
2014 ◽  
Vol 184 (4) ◽  
pp. 208 ◽  
Author(s):  
Priscila Izabel Tremarin ◽  
Thelma Ludwig ◽  
Lezilda Torgan
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Aquatic Environments ◽  
Similar Species ◽  
Scanning Electron ◽  
Freshwater Diatom

Examination of samples from different aquatic environments from Brazil revealed the presence of a new Aulacoseira species. Aulacoseira veraluciae Tremarin, Torgan & T. Ludwig is described and illustrated with light and scanning electron microscopy, and its morphology compared with that of similar species, such as A. muzzanensis (Meister) Krammer, A. granulata (Ehrenberg) Simonsen and A. agassizii (Ostenfeld) Simonsen. The new species is characterized mainly by the straight pervalvar rows of areolae, morphology of the linking spines, shape and position of the rimoportulae on the valve mantle, deepness and thickness of the ringleiste.

Encyonema bonapartei sp. nov.: a new freshwater diatom species (Cymbellales, Bacillariophyceae) in canals of Great East region (France)

Phytotaxa ◽  
2016 ◽  
Vol 284 (4) ◽  
pp. 273 ◽  
Author(s):  
DAVID HEUDRE ◽  
CARLOS E. WETZEL ◽  
LUC ECTOR
Keyword(s):  
Monitoring Program ◽  
Central Area ◽  
Similar Species ◽  
Ventral Margin ◽  
East Region ◽  
European Water ◽  
Northeastern France ◽  
Physicochemical Data ◽  
A New Species ◽  
Freshwater Diatom

As a part of the Monitoring Program of the European Water Framework Directive, the phytobenthos of streams and canals was studied in the Great East region of northeastern France (French part of Rhine-Meuse river basin and Seine-Normandy basin). A new species, Encyonema bonapartei was identified in canals. Its morphology was examined in detail using light and scanning electron microscopy, which showed a unique combination of measurements and shape: valves are clearly asymmetrical and semi-elliptical to semi-elliptical-lanceolate with central area extended on ventral margin by shorter or missing striae. The striation is almost parallel with areolae indistinguishable in the light microscope. This paper provides comparison with morphologically similar species: Cymbopleura hustedtii, Encyonema brehmii, E. kalbei, E. marvanii, E. reichardtii and E. yuwadeeanum. Encyonema bonapartei was first discovered in the East Canal in 2014. It was then found in the Rhône-to-Rhine Canal and Champagne and Burgundy Canal in 2015. Most likely it will spread further in connected waterways. Information on its autecology is presented using the physicochemical data of the type locality.

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