Cocconeis czarneckii sp. nov. (Bacillariophyta): a new diatom species from Lake Okoboji (Iowa, USA), based on the strain UTEX FD23

Phycologia ◽  
2021 ◽  
pp. 1-15
Author(s):  
Demetrio Mora ◽  
Rosalina Stancheva ◽  
Regine Jahn
Keyword(s):  
Diatom Species

Automatic accounting of Baikal diatomic algae: approaches and prospects

2019 ◽  
pp. 295-299
Author(s):  
Кonstantin А. Elshin ◽  
Еlena I. Molchanova ◽  
Мarina V. Usoltseva ◽  
Yelena V. Likhoshway
Keyword(s):  
Object Detection ◽  
Loss Function ◽  
Classification Accuracy ◽  
Diatom Species ◽  
Bounding Box ◽  
Synedra Acus ◽  
And Training

Using the TensorFlow Object Detection API, an approach to identifying and registering Baikal diatom species Synedra acus subsp. radians has been tested. As a result, a set of images was formed and training was conducted. It is shown that аfter 15000 training iterations, the total value of the loss function was obtained equal to 0,04. At the same time, the classification accuracy is equal to 95%, and the accuracy of construction of the bounding box is also equal to 95%.

Diatoms of the genus Navicula of Lake Teletskoye (Altai) and some rivers of its basin

2019 ◽  
Vol 53 (2) ◽  
pp. 255-278
Author(s):  
D. A. Chudaev
Keyword(s):  
New Species ◽  
Diatom Species ◽  
Lake Teletskoye ◽  
First Time ◽  
One New Species

As a result of study of 18 samples, collected in Lake Teletskoye and inflowing rivers in 1992–1995, 34 diatom species of the genus Navicula Bory were found. Among them 21 taxa are new for the studied region, 7 species (Navicula arkona, N. hangaica, N. cf. pseudoreinhardtii, N. ricardae, N. scaniae, N. schweigeri, N. suecicarum) are recorded for the first time in Russia. One new species (N. pseudoharmoniae sp. nov.) is described. It is compared with N. harmoniae and N. digitoconvergens.

New cryptogamic records. 4

2019 ◽  
Vol 53 (2) ◽  
pp. 431-479 ◽  
Author(s):  
I. V. Czernyadjeva ◽  
O. M. Afonina ◽  
D. V. Ageev ◽  
E. Z. Baisheva ◽  
T. M. Bulyonkova ◽  
...  
Keyword(s):  
Sakhalin Island ◽  
Diatom Species ◽  
Altai Republic ◽  
Lichenicolous Fungi ◽  
Magadan Region ◽  
Novosibirsk Region ◽  
Republic Of Bashkortostan ◽  
Khanty Mansi Autonomous

First records of diatom species from the Barents and East-Siberian seas, of Myxomycetes for the Khanty-Mansi Autonomous Area — Yugra, Novosibirsk Region, Trans-Baikal Territory, Basidiomycetes for the Arkhangelsk, Novosibirsk, Rostov and Volgograd regions, Altai Republic, Altai Territory, lichens, calicioid and lichenicolous fungi for the Murmansk, Novgorod and Tver regions, bryophytes for the Lipezk, Voronezh and Volgograd regions, St. Petersburg, Stavropol Territory, Caucasus, Republic of Bashkortostan, Yamal and Gydan peninsulas, Trans-Baikal Territory, Magadan Region, Sakhalin Island, Republic of Uzbekistan are presented. Data on localities, habitats, distribution of recorded species are provided.

On the morphological variability of Navicula schmassmannii (Bacillariophyta)

2010 ◽  
Vol 44 ◽  
pp. 32-38 ◽  
Author(s):  
S. I. Genkal ◽  
W. G. Kharitonov
Keyword(s):  
Morphological Variability ◽  
Central Area ◽  
Diatom Species ◽  
Species Diagnosis ◽  
Wide Variability ◽  
Ultraoligotrophic Lake

On the basis of the studied materials from the ultraoligotrophic lake Elgygytgyn (Chukotka), a rare for the flora of Russia diatom species Navicula schmassmannii was recorded. In the studied populations of the species a wide variability of morphological quantitative (valve length and width, the number of stria in 10 μm) and qualitative (the shape of the valve and the central area) features was marked. It made the basis for emending of the species diagnosis.

Neidium vietnamensis – a new diatom species (Bacillariophyceae: Neidiaceae) from Vietnam and a checklist of the genus from Southeast Asia

2019 ◽  
Vol 34 (4) ◽  
pp. 259-269
Author(s):  
Anton Glushchenko ◽  
John Patrick Kociolek ◽  
Irina Kuznetsova ◽  
Maxim Kulikovskiy
Keyword(s):  
Southeast Asia ◽  
Diatom Species

scholarly journals A comparative study of Pleurosigma subrectum and P. acus (Bacillariophyta)

Phytotaxa ◽  
2015 ◽  
Vol 207 (3) ◽  
pp. 273
Author(s):  
FRITHJOF A.S. STERRENBURG ◽  
STUART R. STIDOLPH ◽  
EUGENIA A. SAR ◽  
Ines Sunesen
Keyword(s):  
Comparative Study ◽  
Original Data ◽  
Type Material ◽  
Diatom Species ◽  
Morphological Differences ◽  
Sem Investigation ◽  
Made In

In continuation of an earlier paper on Pleurosigma species with an (almost) non-sigmoid valve and raphe sternum, a comparative study was made in LM and SEM of Pleurosigma subrectum and P. acus. For P. subrectum, slides and a subsample of the type material were examined. For P. acus no unmounted material permitting SEM investigation is extant; a sample containing specimens fully matching the type in LM was therefore used as epitype material for SEM. The original data on striation of P. acus are emended. No morphological differences indicating separate specific status of these two taxa were observed and P. acus is therefore here designated a heterotypic synonym of P. subrectum. From the data now available, this is a very widely distributed species. The study demonstrates the indispensable role of collections for investigations on the diversity and distribution of diatom species.

New species of benthic marine diatoms (Bacillariophyta) from the Western Pacific islands of Guam and Yap

Phytotaxa ◽  
2021 ◽  
Vol 508 (3) ◽  
Author(s):  
CHRISTOPHER S. LOBBAN
Keyword(s):  
Pacific Islands ◽  
Central Area ◽  
Marshall Islands ◽  
Marine Diatom ◽  
Large Species ◽  
Diatom Species ◽  
Cell Interior ◽  
Pennate Diatom ◽  
The Western Pacific ◽  
Benthic Marine Diatoms

In the course of preparation of a major checklist for Yap and ongoing investigations into the benthic marine diatom flora of Micronesia, thirteen new araphid and raphid pennate diatom species have been recognized and are described here. Plagiogramma subatomus is even smaller than P. atomus and the pseudoseptum forms a box with only a small opening toward the cell interior. Licmophora romuli is similar in size and spathulate shape to L. remulus, but the majority of the striae in the lamina lack vimines. L. graphis is exceedingly delicate, pencil-shaped, with apical striae 60–70 in 10 µm. Divergita biformis and D. decipiens are straight species with striae biseriate on the margin, uniseriate on the valve face, differing in the shape and prominence of the sternum and the shape of the valve-face areolae. D. macinnisii (from Marshall Islands, but included here for comparison) is curved, again with the decussate areolar pattern on the mantle, but with single extended areolae along each side of the linear sternum. These characters slightly amend the diagnosis of the genus.  Thalassionema baculum is a very short member of the genus, linear and isopolar. Climaconeis tarangensis is curved and differs from C. riddleae in stria density and areola shape; C. minaegensis is straight, without a stauros or craticular bars, of intermediate length, 228–247 µm. First SEM observations of Climaconeis lorenzii are presented and an updated key to Climaconeis is appended. Parlibellus paschalis is a tube-dwelling species differing from P. delognei is lacking cuniculi and pores in the central area. P. waabensis is a relatively large species, possibly tube-dwelling, that differs from P. delognei in shape and spacing of central striae and from P. berkeleyi in width and stria density. Pleurosigma simulacrum differs in ultrastructural details from P. intermedium. Lastly, Nitzschia tarangensis is a conopeate species, spathulate in profile with ribs along the edge of the valve depression and bordering the raphe, and with pores in the peri-raphe zone.

Inhibitory effect of benthic diatom species on three aquaculture pathogenic vibrios

2017 ◽  
Vol 27 ◽  
pp. 131-139 ◽  
Author(s):  
Ceres A. Molina-Cárdenas ◽  
M. del Pilar Sánchez-Saavedra
Keyword(s):  
Inhibitory Effect ◽  
Benthic Diatom ◽  
Diatom Species ◽  
Pathogenic Vibrios
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