Fragilaria irregularis sp. nov. a new araphid species (Fragilariaceae, Bacillariophyta) from the River Adegoy, Krasnodar Territory, Russia

Phytotaxa ◽  
2021 ◽  
Vol 508 (2) ◽  
Author(s):  
DMITRY CHUDAEV ◽  
INGRID JÜTTNER ◽  
BART VAN DE VIJVER
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Similar Species ◽  
New Taxon ◽  
Weakly Convex ◽  
Diatom Flora ◽  
A New Species ◽  
Scanning Electron

During a survey of the diatom flora of the Adegoy River (Krasnodar Territory, Russia), an unknown Fragilaria species (Bacillariophyta) was found that could not be identified using the currently available literature and here we describe it as a new species. The morphology of Fragilaria irregularis sp. nov. was studied using light and scanning electron microscopy and compared to similar species including Fragilaria deformis, F. rinoi, F. septentrionalis and Fragilariforma bicapitata. It differed from these taxa in several characters. Most observed valves showed an irregular striation pattern, a feature not observed in other species. Other important differences include valve outline (linear with parallel margins) and stria density (7–14 in 10 µm, lower compared to all other species). The new taxon has a linear valve outline with parallel to weakly convex margins, subcapitate apices and a very irregular, coarse striation pattern.

Encyonema oblonga (Bacillariophyta, Cymbellaceae), a new species from Shanxi Province, China

Phytotaxa ◽  
2021 ◽  
Vol 480 (3) ◽  
pp. 284-290
Author(s):  
QI LIU ◽  
JIAJIA LI ◽  
QUANXI WANG ◽  
JOHN PATRICK KOCIOLEK Patrick Kociolek ◽  
Shulian Xie
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Shanxi Province ◽  
Diatom Flora ◽  
A New Species ◽  
Scanning Electron ◽  
Freshwater Diatom

A new species, Encyonema oblonga Liu & Xie, is collected during a survey of the freshwater diatom flora of Manghe River, Shanxi, China. The valves of this new species are oblong with rounded apices and have the features typical of Encyonema, including complex areolae. We compare the new species with the most similar taxa, E. leei, E. leei var. sinensis and E. appalachianum and consider that  E. leei var. sinensis is the valid name.  The morphology of E. oblonga is documented with light and scanning electron microscopy.

A new marine epiphytic diatom species, Halamphora yundangensis sp. nov. (Bacillariophyceae), from Yundang Lake, Southeast coast of China

Phytotaxa ◽  
2020 ◽  
Vol 450 (2) ◽  
pp. 209-218
Author(s):  
WEIWEI WU ◽  
HUINA LIN ◽  
VISHAL PATIL ◽  
JOHN PATRICK KOCIOLEK ◽  
LIN SUN ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Similar Species ◽  
Dorsal Margin ◽  
Ventral Margin ◽  
Diatom Species ◽  
Green Seaweed ◽  
A New Species ◽  
Scanning Electron

Halamphora yundangensis sp. nov. is described as a new species epiphytic on the green seaweed Ulva lactuca, from Yundang Lake, Fujian Province, China. Morphological details of the new species with respect to shape, size and valve ultrastructure are presented, with observations based on light microscopy (LM) and scanning electron microscopy (SEM). The main features of Halamphora yundangensis are dorsiventral, semi-lanceolate valves with convex dorsal margin and straight ventral margin, as well as valve ends distinctly protracted and capitate. Externally, a prominent marginal ridge forming the image of a broad hyaline area is present. Internally, dorsal striae are regularly biseriate, and a row of areolae lies along raphe. The new species is compared with similar species in both Amphora and Halamphora.

scholarly journals Encyonopsis indonesica sp. nov. (Bacillariophyceae, Cymbellales), a new diatom from the ancient lake Matano (Sulawesi, Indonesia)

PhytoKeys ◽  
2021 ◽  
Vol 175 ◽  
pp. 1-11
Author(s):  
Dmitry A. Kapustin ◽  
Anton M. Glushchenko ◽  
John P. Kociolek ◽  
Maxim S. Kulikovskiy
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
New Caledonia ◽  
Ventral Side ◽  
Similar Species ◽  
Ancient Lake ◽  
Lake Matano ◽  
A New Species ◽  
Scanning Electron

A new species, Encyonopsis indonesica, is described from the ancient lake Matano, Sulawesi island, Indonesia. The morphology of this species was studied by means of light and scanning electron microscopy. E. indonesica has a remarkable valve ultrastructure. The valve surface is ornamented with numerous longitudinal siliceous ribs and siliceous verrucae. Valve face delineated from the mantle by a thickened marginal ridge. Raised sterna border the raphe branches. Raphe is distinctly undulate with distal ends hooked strongly to the ventral side. The only similar species to E. indonesica is Amphora dissimilis described from New Caledonia. Comparison of both taxa is given and A. dissimilis is transferred to Encyonopsis. The taxonomic placement of both taxa is evaluated, and the phenomenon of external siliceous ornamentation is discussed.

Gomphosinica selincuoensis sp. nov., a new diatom (Bacillariophyceae) from North Tibet, China

Phytotaxa ◽  
2019 ◽  
Vol 423 (3) ◽  
pp. 195-205 ◽  
Author(s):  
LI YANG ◽  
QING-MIN YOU ◽  
J. P. KOCIOLEK ◽  
LI-QING WANG ◽  
WEI ZHANG
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
North America ◽  
The Other ◽  
Central Portion ◽  
Similar Species ◽  
A New Species ◽  
Scanning Electron

A new species, Gomphosinica selincuoensis sp. nov., is described from Lake Selincuo, North Tibet, China. This taxon is clearly different from the other species in genus Gomphosinica, with a distinctly protracted, rostrate headpole, relatively higher striae density, and distinctive areolae arrangement within the striae. Striae have areolae mostly in 3 rows, but there are places near the central portion of the valve and at footpole where there are only 2 rows of areolae per stria. Characteristics of this taxon, as observed in light and scanning electron microscopy, support its systematic placement in the genus Gomphosinica. This new species is compared with similar species in Gomphosinica from China and North America, and the biogeographic distribution of the genus is discussed.

A new diatomspecies of Aneumastus D. G. Mann & Stickle ((Bacillariophyta, Bacillariophyceae, Mastogloiales, Mastogloiaceae) from Tibet, China

Phytotaxa ◽  
2018 ◽  
Vol 373 (3) ◽  
pp. 231 ◽  
Author(s):  
QI LIU ◽  
LIN YANG ◽  
FANGRU NAN ◽  
JIA FENG ◽  
JUNPING LV ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Diatom Flora ◽  
A Minor ◽  
A New Species ◽  
Scanning Electron ◽  
Freshwater Diatom

A new species, Aneumastus yamdrokensis Liu & Xie, is described from Yamdrok Lake, collected during a survey of the freshwater diatom flora of Tibet, China. The valves of this new species are elliptical-lanceolate with rounded apices and have the features typical of the genus, including complex areolae. The morphology of A. yamdrokensis is documented with light and scanning electron microscopy, described in detail, and compared with the most similar taxa, including A. minor Lange-Bertalot and A. densistriatus.

A new species of Scissurella from the Azores with discussions on Sinezona semicostata Burnay & Rolan, 1990 and Sinezona cingulata (O.G. Costa, 1861) (Gastropoda: Vetigastropoda: Scissurellidae)

Zootaxa ◽  
2008 ◽  
Vol 1678 (1) ◽  
pp. 51
Author(s):  
JAYA M. NOLT
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Shell Shape ◽  
Similar Species ◽  
Distributional Range ◽  
The Caribbean ◽  
A New Species ◽  
Shell Sculpture ◽  
Scanning Electron

A new species of Scissurella d’Orbigny, 1824 from the Azores is described and compared to similar species from the eastern Atlantic and Mediterranean areas: Sinezona cingulata (O.G. Costa, 1861), Scissurella costata d’Orbigny, 1824, Sin. semicostata Burnay & Rolán, 1990, Sci. lobini (Burnay & Rolán, 1990) as well as two representatives from the Caribbean, Sin. confusa Rolán & Luque, 1994 and Sci. redferni (Rolán, 1996). The description and comparisons are based on shell and radula morphology examined by scanning electron microscopy. The species that are considered here are described by features including: shell shape, shell sculpture, shape of teleoconch I, which begins after the protoconch and ends at the onset of the selenizone and teleoconch II which extends from the selenizone to the aperture, presence or absence of a slit or foramen, details of the umbilical region and protoconch sculpture and width. Scissurella azorensis n. sp. is characterized by the protoconch sculpture, which contains axial cords on the outer margins only, having a open umbilicus region, teleoconch I being greater then one whorl and the amount of strong axial cords over the entire shell. The distributional range for Sin. semicostata is extended to the Salvage Islands. Sinezona fayalensis (Dautzenberg, 1889), Sin. depressa (Watson, 1897) and Sin. crossei (Folin, 1869) are compared to Sin. cingulata to show synonymy.

New species of the genus Navicula Bory (Bacillariophyceae, Naviculaceae) from Lake Teletskoye

Phytotaxa ◽  
2019 ◽  
Vol 404 (4) ◽  
pp. 163 ◽  
Author(s):  
DMITRY A. CHUDAEV
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
West Siberia ◽  
Oligotrophic Lake ◽  
Similar Species ◽  
Lake Teletskoye ◽  
Diatom Genus ◽  
A New Species ◽  
Scanning Electron

A new species from the diatom genus Navicula—N. teletskoyensis sp. nov. is described from mountain oligotrophic Lake Teletskoye (West Siberia). Morphology of the taxon was studied under light and scanning electron microscopy. New species is compared with morphologically similar species, it resembles N. pseudolanceolata, N. bourrellyivera, N. trivialis, N. oligotraphenta, N. hanseatica, N. melovskii, N. subconcentrica, N. johncarteri and N. vaneei.

Euastrum kossinskiae: a new species of desmid from the aapa mire of the Vologda Region (European Russia)

Phytotaxa ◽  
2018 ◽  
Vol 376 (1) ◽  
pp. 77
Author(s):  
OLGA V. ANISSIMOVA ◽  
DMITRIY A. PHILIPPOV
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
European Russia ◽  
The Other ◽  
Similar Species ◽  
Vologda Region ◽  
A New Species ◽  
Scanning Electron

A new small-celled species of the genus Euastrum is described from Piyavochnoe Mire (Vologda Region, European Russia). The species was studied by light and scanning electron microscopy. This species refers to the group of Cosmarium-like species of Euastrum. This taxon is also compared to the other morphologically similar species.

Gomphosphenia plenkoviciae sp. nov. A new species from Crveno jezero, Croatia

Phytotaxa ◽  
2018 ◽  
Vol 351 (3) ◽  
pp. 229 ◽  
Author(s):  
MARIJA GLIGORA UDOVIČ ◽  
PETAR ŽUTINIĆ ◽  
IVNA KAVRE PILTAVER ◽  
ANTONIJA KULAŠ ◽  
ROMAN OZIMEC ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Central Area ◽  
Natural Sciences ◽  
Diatom Flora ◽  
Red Lake ◽  
Cave Diving ◽  
A New Species ◽  
Scanning Electron

Crveno jezero (Red Lake) is one of the largest karstic sinkhole lakes in the Europe. Diatom flora of this lake was unknown due to difficulties in collecting samples. Recently, samples were collected by speleodivers in the frame of systematical natural sciences research, during the cave diving expedition “Crveno jezero 2017” and observations revealed the existence of a new species, Gomphosphenia plenkoviciae Gligora Udovič & Žutinić sp. nov. The species is described herein as new to science based on light and scanning electron microscopy. Gomphosphenia plenkoviciae is characterized by having narrowly clavate to linear valves, which are slightly heteropolar in larger specimens to clavate in smaller specimens, thus differing from the closest taxon by the valve outline and shape of the central area. Smaller valves of G. plenkoviciae differ from other small-sized Gomphosphenia species by valve outline, striae morphology and the shape of axial and central areas.

A new species of Cribraria (Myxomycetes) from Australia

2018 ◽  
Vol 52 (2) ◽  
pp. 379-385 ◽  
Author(s):  
S. L. Stephenson ◽  
Yu. K. Novozhilov ◽  
P. Wellman
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Lemon Yellow ◽  
Moist Chamber ◽  
Light Yellow ◽  
Dark Violet ◽  
The Stability ◽  
A New Species ◽  
Scanning Electron

A new species of Cribraria, described herein as C. bicolor, appeared in moist chamber cultures on samples of the bark of Eucalyptus sp. collected at two localities in Australia. The morphology of representative specimens was examined by light and scanning electron microscopy, and micrographs of relevant morphological details of sporocarps and spores are provided. The species has a number of distinct and unique morphological features, including a glossy bright-violet globose sporotheca and a two-colored long stalk which is bright-red over the lower one-third and light yellow or lemon-yellow over the upper two-thirds. The combination of these characteristics as well as a shallow calyculus which is dark-violet when viewed under a dissecting microscope and bright red in transmitted light when mounted in lactophenol makes C. bicolor a well-defined morphospecies when compared to all other species of Cribraria. The stability of the taxonomic characters of the species was confirmed by an examination of a number of specimens.

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