Neidiomorpha gusevii—a new diatom species (Bacillariophyceae: Neidiaceae) from Southeast Asia

Phytotaxa ◽  
2019 ◽  
Vol 415 (5) ◽  
pp. 279-285 ◽  
Author(s):  
ANTON GLUSHCHENKO ◽  
JOHN PATRICK KOCIOLEK ◽  
IRINA KUZNETSOVA ◽  
ELENA KEZLYA ◽  
MAXIM KULIKOVSKIY
Keyword(s):  
New Species ◽  
Southeast Asia ◽  
Morphological Features ◽  
Diatom Species ◽  
Outline Shape ◽  
Electron Microscopical ◽  
One New Species ◽  
Scanning Electron

We present light and scanning electron microscopical observations on one new species of Neidiomorpha from Vietnam. The new species, Nediomorpha gusevii Glushchenko, Kulikovskiy & Kociolek sp. nov., is described on the basis valve outline, shape of the apices, as well as striae and areolae densities. Morphology of Neidiomorpha species, especially on the basis valve outline, is discussed. Neidiomorpha gusevii sp. nov. possesses all of the typical morphological features for the genus, including valves that have longitudinal canals with pleuriseriate coverings, constrictions about the center, rostrate apices, uniseriate striae, absence of renilimbii, straight raphe with small central pores and hooked distal raphe ends going to mantle, and lacking lacinia. Our new species is compared with other three known species from the genus Neidiomorpha, including N. binodis, N. binodiforme and N. sichuaniana. N. gusevii sp. nov. is the first species of Neidiomorpha documented with LM and SEM from Southeast Asia.

Prestauroneis genkalii—a new diatom species (Bacillariophyceae: Stauroneidaceae) from Southeast Asia

Phytotaxa ◽  
2019 ◽  
Vol 414 (4) ◽  
pp. 156-164
Author(s):  
ANTON GLUSHCHENKO ◽  
JOHN PATRICK KOCIOLEK ◽  
IRINA KUZNETSOVA ◽  
ELENA KEZLYA ◽  
MAXIM KULIKOVSKIY
Keyword(s):  
New Species ◽  
Southeast Asia ◽  
Morphological Features ◽  
New Combination ◽  
Diatom Species ◽  
Outline Shape ◽  
Electron Microscopical ◽  
One New Species ◽  
Scanning Electron

We present light and scanning electron microscopical observations on one new species of Prestauroneis from Vietnam. The new species, Prestauroneis genkalii Glushchenko, Kulikovskiy & Kociolek sp. nov., is described on the basis valve outline, shape of the apices, as well as striae and areolar densities. Morphology of Prestauroneis species, especially with respect to valve outline, is discussed. P. genkalii sp. nov. possesses all of the typical morphological features for the genus, including uniseriate striae covered by internal hymenes, a pseudoseptum at each apex and distal raphe ends extending onto the valve mantle. In addition, a new combination is suggested for Navicula pseudocrucicula Kobayasi, Prestauroneis pseudocrucicula (Kobayasi) Glushchenko, Kulikovskiy & Kociolek comb. nov. on the basis of type description. P. genkalii sp. nov. is the first member of the genus Prestauroneis reported for Southeast Asia.

New diatom species Navicula davidovichii from Vietnam (Southeast Asia)

Phytotaxa ◽  
2020 ◽  
Vol 452 (1) ◽  
pp. 83-91
Author(s):  
MAXIM KULIKOVSKIY ◽  
DMITRY CHUDAEV ◽  
ANTON GLUSHCHENKO ◽  
IRINA KUZNETSOVA ◽  
JOHN PATRICK KOCIOLEK
Keyword(s):  
New Species ◽  
Southeast Asia ◽  
Internal Surface ◽  
Sensu Stricto ◽  
Similar Species ◽  
Diatom Species ◽  
Electron Microscopical ◽  
One New Species ◽  
Accessory Rib ◽  
Scanning Electron

We present light and scanning electron microscopical observations on one new species of Navicula Bory sensu stricto from Vietnam. The new species, Navicula davidovichii Chudaev, Glushchenko, Kulikovskiy & Kociolek sp. nov., possesses all typical morphological features for the genus, including uniseriate striae covered by internal convex hymenes, median raphe with accessory rib at the internal surface, and hooked external distal raphe ends. Navicula davidovichii sp. nov., is distinguished from others in the genus on the basis valve outline, shape of the apices, as well as striae and areolar densities. The very interesting shape of the valve, with widely rounded capitate apices, is more typical for species in the genus Pinnularia than in Navicula. Morphologically similar species are almost unknown, except possibly Navicula reinhardtii (Grunow) Grunow. Comparison with the above-mentioned species is given.

New diatom species from the Gomphonema subtile group in Southeast Asia

Phytotaxa ◽  
2017 ◽  
Vol 329 (3) ◽  
pp. 223 ◽  
Author(s):  
ANTON GLUSHCHENKO ◽  
MAXIM KULIKOVSKIY ◽  
JOHN PATRICK KOCIOLEK
Keyword(s):  
New Species ◽  
Southeast Asia ◽  
Species Distribution ◽  
Species Complex ◽  
Diatom Species ◽  
Tropical Zone ◽  
Two New Species ◽  
Electron Microscopical ◽  
The Town ◽  
Scanning Electron

Two new diatom species from the Gomphonema subtile species complex were found in Đả Tiên reservoir, near the Town of Ðà Lạt, Lâm Đồng Province, Vietnam, as well as in the River Nam Leuk, Phou Khao Khouay, Laos. These new species include Gomphonema dalatica Glushchenko, Kulikovskiy & Kociolek sp. nov. and Gomphonema prowsei Glushchenko, Kulikovskiy & Kociolek sp. nov. Additionally, G. pantropicum Reichardt, a species known from the tropical zone, was found in our material. We provide light and scanning electron microscopical observations for all taxa, and offer formal descriptions for the two new species. Distribution of these three species is discussed.

Envekadea vranaensis sp. nov. a new diatom species (Bacillariophyta) from the lacustrine Holocene sediments of Lake Vrana, Croatia

Nova Hedwigia ◽  
2020 ◽  
Vol 110 (1) ◽  
pp. 1-19
Author(s):  
Katarina Caput Mihalić ◽  
Ines Galović ◽  
Carlos E. Wetzel ◽  
Luc Ector ◽  
Nikolina Ilijani ◽  
...  
Keyword(s):  
New Species ◽  
Morphological Features ◽  
Diatom Species ◽  
Ecological Preferences ◽  
Outline Shape ◽  
Holocene Sediments ◽  
A New Species

A new species, Envekadea vranaensis Caput Mihalić, Galović & Levkov sp. nov., is described from Holocene sediments of Lake Vrana, Croatia. The new species is characterized by linear-lanceolate valves with broadly capitate apices and is 40.0–67.5 μm long and 7.5–9.0 μm wide. Based on its morphological features it is similar to E. hedinii and E . pseudocrassirostris. Also, E. vranaensis shares morphological and ultrastructural features with E . vanlandinghamii, from which it can be differentiated by the valve outline, shape of the apices, stria density and the shape of proximal raphe endings. We present stratigraphic occurrence and ecological preferences for E . vranaensis based on associated paleoecological proxies.

Navicula gogorevii—a new, large-celled diatom species from Vietnam (Southeast Asia)

Phytotaxa ◽  
2020 ◽  
Vol 428 (1) ◽  
pp. 60-66
Author(s):  
MAXIM KULIKOVSKIY ◽  
DMITRY CHUDAEV ◽  
ANTON GLUSHCHENKO ◽  
IRINA KUZNETSOVA ◽  
ZINAIDA KRIVOVA ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Characteristic Feature ◽  
Southeast Asia ◽  
Sensu Stricto ◽  
Diatom Species ◽  
Scanning Electron

We describe a new member from the genus Navicula Bory sensu stricto using light and scanning electron microscopy. The new species was found in Vietnam, and is a large-celled species with longitudinal grooves present on the valve exterior. Taxa sharing this feature are known from the genus Navicula, as well as the genera Haslea Simonsen, Craticula Grunow, Gyrosigma Hassall and Proschkinia Karajeva. The new species from Vietnam is compared with other, similar taxa of Navicula, and comments are presented about the systematics and biogeography of the group of Navicula species with this characteristic feature.

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.

A re-description of Fragilaria fonticola Hustedt and its varieties, with three new combinations and one new species from India

Phytotaxa ◽  
2020 ◽  
Vol 453 (3) ◽  
pp. 179-198
Author(s):  
ANBUKKARASU VIGNESHWARAN ◽  
CARLOS E. WETZEL ◽  
DAVID M. WILLIAMS ◽  
BALASUBRAMANIAN KARTHICK
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
River Basin ◽  
Western Ghats ◽  
Morphological Features ◽  
New Combinations ◽  
One New Species ◽  
Scanning Electron

Tabularia (Kützing) D.M. Williams & Round has received some attention since its separation from Synedra. The present study investigates Fragilaria fonticola Hustedt and its varieties based on the analysis of the type materials. The combinations were proposed as Tabularia fonticola (Hustedt) C.E. Wetzel & D.M. Williams comb. nov. (≡ Fragilaria fonticola Hustedt), Tabularia angusta (Hustedt) C.E. Wetzel & D.M. Williams comb. nov. et stat. nov. (≡ Fragilaria fonticola var. angusta Hustedt), Tabularia chandolensis (Gandhi) A. Vigneshwaran, D.M. Williams & B. Karthick comb. nov. (≡ Synedra chandolensis Gandhi) and the new species, Tabularia koynensis sp. nov. is also described from the Koyna River basin, Western Ghats, India. The detailed morphological features were analysed under light and scanning electron microscopy. Tabularia koynensis has linear valves outline with square to rounded ends. Striae short, radiate towards ends. This new species compared with T. sinensis, T. fasciculata, T. tabulata, T. kobayasii and Fragilaria longissima, which differ in size, valve shape, striae density and ultrastructure.

Planothidium sheathii, a new monoraphid diatom species from rivers in California, USA

Phytotaxa ◽  
2019 ◽  
Vol 393 (2) ◽  
pp. 131 ◽  
Author(s):  
ROSALINA STANCHEVA
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Morphological Features ◽  
Diatom Species ◽  
Unique Combination ◽  
Valve Morphology ◽  
Valve Margin ◽  
A New Species ◽  
Scanning Electron

Planothidium sheathii sp. nov., a new species from rivers in California, USA, is described based on light and scanning electron microscopy. P. sheathii has broadly lanceolate to elliptic valves with obtusely rounded apices and a unique combination of morphological features, as follows: 1) cavum with broad hood aperture that flares out at the valve margin with open borders fused with the neighboring virgae on SV, 2) multiseriate striae, composed of five to six rows of same sized areolae on both valves, interrupted at valve mantle junction, and 3) areolae groups on valve mantle, with rounded areolae on RV, and rounded and elongated areolae on SV. Valve morphology of P. sheathii is discussed in comparison with similar freshwater taxa, from which the new species is clearly distinct.

Revision of the species of Jaliscoa Bouček within a review of the identity, relationships and membership of Jaliscoa, Catolaccus Thomson, Eurydinoteloides Girault, Lyrcus Walker and Trimeromicrus Gahan (Hymenoptera: Pteromalidae)

Zootaxa ◽  
2013 ◽  
Vol 3612 (1) ◽  
pp. 1-85 ◽  
Author(s):  
GARY A. P. GIBSON
Keyword(s):  
New Species ◽  
New World ◽  
Single Species ◽  
Morphological Features ◽  
Type Specimens ◽  
World Species ◽  
European Species ◽  
Primary Type ◽  
One New Species ◽  
Scanning Electron

The limits of Lyrcus Walker (1842), Catolaccus Thomson (1878), Eurydinoteloides Girault (1913a), Trimeromicrus Gahan (1914), and Jaliscoa Bouček (1993) are re-evaluated and redefined to better reflect observed distribution of morphological features. Nine of 13 New World species of Catolaccus are transferred to other genera and photographs of the primary type specimens are given to assist future recognition. New features are provided to assist identification of the remaining four Nearctic species of Catolaccus and these are compared to European species, with the observation that C. kansensis (Girault 1917c) could be a junior synonym of C. crassiceps (Masi 1911). Trimeromicrus is removed from synonymy under Lyrcus for the single species T. maculatus Gahan (1914) rev. comb. Newly synonymized under Lyrcus is the Australasian genus Neocylus Bouček (1988) n. syn. Ten species are newly transferred to Lyrcus—L. nigraeneus (Girault 1915) n. comb. (from Neocylus), L. helice (Walker 1843) n. comb. and L. cyaneus (Girault 1911) n. comb. (from Catolaccus), and L. albiclavus (Girault 1917c) n. comb., L. capitis (Burks 1955) n. comb., L. chalcis (Burks 1955) n. comb., L. coeliodis (Ashmead 1896) n. comb., L. deuterus (Crawford 1911) n. comb., L. nigroaeneus (Ashmead 1894a) n. comb. and L. rosaecolis (Burks 1955) n. comb. (from Zatropis Crawford 1908). Catolaccus pallipes Ashmead (1894b) is newly transferred to Pteromalus Swederus (1795) as Pteromalus pallipes (Ashmead) n. comb. and Catolaccus fragariae Rohwer (1934) to Lariophagus Crawford (1909) as Lariophagus fragariae (Rohwer) n. comb. Nine species are newly transferred to Eurydinoteloides—E. tepicensis (Ashmead 1895) n. comb. (from Catolaccus), E. dymnus (Walker 1847) n. comb., E. hermeas (Walker 1847) n. comb., E. incerta (Ashmead 1893) n. comb., E. orontas (Walker 1847) n. comb., E. perdubia (Girault 1916) n. comb., E. platensis (De Santis in De Santis et al. 1979) n. comb. and E. timaea (Walker 1847) n. comb. (from Lyrcus), and E. eudubia (Özdikmen 2011) n. comb. (from Spintherus Thomson 1878). Four species are newly transferred to Jaliscoa—J. grandis (Burks 1954) n. comb. and J. hunteri (Crawford 1908) n. comb. (from Catolaccus), and J. townsendi (Crawford 1912) n. comb. and J. vulgaris (Ashmead 1894b) n. comb. (from Pteromalus). The species of Jaliscoa are revised to include J. nudipennis Bouček 1993, J. bouceki n. sp., J. hunteri and J. vulgaris. Re-established in synonymy under J. hunteri is J. townsendi n. comb. One new species of Pteromalus, P. grisselli n. sp., is described as an egg predator in the egg sacs of Dictyna coloradensi Chamberlin (Araneae: Dictynidae) and compared to Catolaccus species and other pteromalids that are predators of spider eggs. Lectotypes are designated for Pteromalus helice Walker (1843), Catolaccus pallipes Ashmead (1894b) and Catolaccus vulgaris Ashmead (1894b). Diagnoses are given to differentiate Catolaccus, Eurydinoteloides, Jaliscoa, Lyrcus and Trimeromicrus from each other, and more extensive descriptions given to help differentiate these genera from other Pteromalinae. Morphological features are illustrated through macrophotography and scanning electron photomicrography.

scholarly journals Microcostatus elisabethianus, a new limnoterrestrial diatom species (Bacillariophyta) from the sub-Antarctic region

2019 ◽  
Vol 152 (3) ◽  
pp. 539-545
Author(s):  
Bart Van de Vijver ◽  
Luc Ector
Keyword(s):  
Indian Ocean ◽  
Morphological Features ◽  
New Taxon ◽  
Diatom Species ◽  
Unique Combination ◽  
Antarctic Region ◽  
Diatom Flora ◽  
Small Cracks ◽  
Electron Microscopical ◽  
Scanning Electron

Background and aims – During a survey of the soil diatom flora of the sub-Antarctic islands in the southern Indian Ocean, an unknown small-celled naviculoid taxon was discovered living in small cracks in cliffs bordering the ocean. The taxon showed a set of morphological features only found in the genus Microcostatus. However, the unknown taxon could not be identified using the currently available literature. Methods – Using both light microscopical and scanning electron microscopical techniques, the morphology of the unknown Microcostatus taxon was documented. The new taxon is described, illustrated and compared with all other similar Microcostatus taxa worldwide. Key results – Microcostatus elisabethianus possesses a unique combination of morphological features that excludes conspecificity with all other members of the genus. It is characterized by a lanceolate valve outline with protracted, elongate apices, a very large, porous conopeum reaching the valve margins and uniseriate striae composed of only one macroareola and mantle areolae restricted to the valve apices. The morphological features of the genus Microcostatus are evaluated and discussed. Notes on the occurrence and ecology of the new taxon are added.

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