Planothidium kaetherobertianum, a new marine diatom (Bacillariophyta) species from the Adriatic Sea

Phytotaxa ◽  
2019 ◽  
Vol 425 (2) ◽  
pp. 105-112 ◽  
Author(s):  
BART VAN DE VIJVER ◽  
SUNČICA BOSAK
Keyword(s):  
Electron Microscopy ◽  
New Species ◽  
Morphological Analysis ◽  
Adriatic Sea ◽  
Large Population ◽  
Caretta Caretta ◽  
Marine Diatom ◽  
Loggerhead Sea Turtles ◽  
Diatom Flora ◽  
Scanning Electron

During a survey of the epizoic diatom flora on carapaces of loggerhead sea turtles (Caretta caretta) from the Adriatic Sea, a fairly large population of an unknown marine Planothidium species was observed. Detailed morphological analysis based on scanning electron microscopy observations and comparison with a large number of known Planothidium species, resulted in the description of the new species as Planothidium kaetherobertianum sp. nov. The new species is characterized by a rapheless valve showing a rather broad axial area with irregular, shallow depressions, striae composed of only 1–2 rows of very small areolae. The raphevalve has biseriate striae with a short third row of areolae inserted between the two rows of areolae near the valve margins. The species shows some resemblance with the group of species around Planothidium delicatulum. The new species is illustrated using both LM and SEM observations and compared with other resembling marine and brackish Planothidium species.

Catenula exigua sp. nov., a new marine diatom (Bacillariophyta) species from the Adriatic Sea

Phytotaxa ◽  
2019 ◽  
Vol 414 (2) ◽  
pp. 113-118 ◽  
Author(s):  
KÄTHE ROBERT ◽  
SUNCICA BOSAK ◽  
BART VAN DE VIJVER
Keyword(s):  
New Species ◽  
Adriatic Sea ◽  
Caretta Caretta ◽  
Small Population ◽  
Marine Diatom ◽  
High Magnification ◽  
Loggerhead Sea Turtles ◽  
Diatom Flora ◽  
Very High ◽  
Scanning Electron

During a survey of the epizoic diatom flora on carapaces of loggerhead sea turtles (Caretta caretta) from the Adriatic Sea, a relatively small population of an unknown amphoroid species was observed, presenting some morphological similarities with the genera Lunella and Catenula. Due to the small size and the lack of distinct structures visible in LM, the observations of its ultrastructure under very high magnification in the scanning electron microscopy (SEM) proved to be critical in taxon delineation and indicated that it should be separated as a new Catenula species. The new species is characterized by very small, dorsiventral valves, striae composed of 1–3 small, marginally placed areolae, a very simple raphe structure lacking terminal raphe fissures, straight simple central raphe endings, the absence of helictoglossa and a distinct central nodule, the latter often discernible in LM. Typical ghost striae, reported to be one of the main morphological features of the genus Catenula, are very faintly present and only visible in the valve interior. The new species is illustrated using both LM and SEM observations and compared with all other known Catenula and Lunella species.

Analysis of the type material of Navicula brachysira Brébisson with the description of Brachysira sandrae, a new raphid diatom (Bacillariophyceae) from Iles Kerguelen (TAAF, sub-Antarctica, southern Indian Ocean)

Phytotaxa ◽  
2014 ◽  
Vol 184 (3) ◽  
pp. 139 ◽  
Author(s):  
Bart Van de Vijver
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Morphological Analysis ◽  
Hot Springs ◽  
Type Material ◽  
Diatom Flora ◽  
Morphological Differences ◽  
Scanning Electron ◽  
Freshwater Diatom

During a study of the freshwater diatom flora of some hot springs on the sub-Antarctic Kerguelen Islands, an unknown Brachysira species was observed. Detailed morphological analysis using both light and scanning electron microscopy observations revealed sufficient morphological differences to separate this species as Brachysira sandrae sp. nov. The new species belongs to the complex of taxa around B. brebissonii. The type material of Navicula brachysira, most likely the type of B. brebissonii, was studied to reveal its morphological ultrastructure. The new species is compared with B. brebissonii and with similar Brachysira taxa worldwide.

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.

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.

Three new Hantzschia species (Bacillariophyta) from the Maritime Antarctic Region

Phytotaxa ◽  
2018 ◽  
Vol 371 (3) ◽  
pp. 168 ◽  
Author(s):  
MARIE BULÍNOVÁ ◽  
NATALIA KOCHMAN-KĘDZIORA ◽  
KATEŘINA KOPALOVÁ ◽  
BART VAN DE VIJVER
Keyword(s):  
Electron Microscopy ◽  
New Species ◽  
Morphological Analysis ◽  
South Shetland Islands ◽  
Maritime Antarctic ◽  
Antarctic Region ◽  
Shetland Islands ◽  
James Ross Island ◽  
Three New Species ◽  
Scanning Electron

Following an earlier revision of the genus Hantzschia (Bacillariophyta) in the Maritime Antarctic Region, several at present unidentified or poorly known taxa of this aerophilic genus have been investigated using both light and scanning electron microscopy. Based on the morphological analysis of the observations, three new species are currently described: Hantzschia australabundans sp. nov., H. zidarovae sp. nov. and H. zikmundiana sp. nov. The new species differ from comparable taxa in valve outline, structure of the internal proximal raphe endings and structure of the striae and areolae. Additional observations are presented on Hantzschia amphioxys and its forma muelleri, H. abundans and H. incognita, based on observations of Antarctic populations from the South Shetland Islands, Vega Island and James Ross Island. Brief notes on the ecology of all reported species are added.

Luticola puchalskiana, a new small terrestrial Luticola species (Bacillariophyceae) from the Maritime Antarctic Region

Phytotaxa ◽  
2020 ◽  
Vol 450 (1) ◽  
pp. 85-94
Author(s):  
NATALIA KOCHMAN-KĘDZIORA ◽  
RALITSA ZIDAROVA ◽  
TERESA NOGA ◽  
MARIA OLECH ◽  
BART VAN DE VIJVER
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Morphological Analysis ◽  
New Taxon ◽  
Maritime Antarctic ◽  
Antarctic Region ◽  
Diatom Flora ◽  
Terrestrial Habitats ◽  
Two Populations ◽  
Scanning Electron

During a survey of the terrestrial diatom flora of the Maritime Antarctic Region, an unknown Luticola taxon that could not be identified using the currently available literature was observed on two islands of the South Shetland Archipelago. After a detailed morphological analysis and comparison, the unknown taxon is described as Luticola puchalskiana sp. nov. The new species can be separated from other Luticola species based on its valve dimensions, stria density and the shape of both central and terminal raphe endings. Two populations of the new taxon were observed in samples collected from terrestrial habitats. The morphology of Luticola puchalskiana is elaborately described and illustrated using both light and scanning electron microscopy observations. A comparison is made with a large number of other morphologically similar Luticola species from the entire (sub)Antarctic Region.

The diatom genus Oricymba in Vietnam and Laos with description of one new species, and a consideration of its systematic placement

Phytotaxa ◽  
2015 ◽  
Vol 227 (2) ◽  
pp. 120 ◽  
Author(s):  
Maxim Sergeevich Kulikovskiy ◽  
Anton Glushchenko ◽  
John Patrick Kociolek
Keyword(s):  
Electron Microscopy ◽  
New Species ◽  
Systematic Position ◽  
Freshwater Ecosystems ◽  
Diatom Flora ◽  
New Information ◽  
Diatom Genus ◽  
One New Species ◽  
A New Species ◽  
Scanning Electron

Species from the genus Oricymba are studied from freshwater ecosystems of Vietnam and Laos. Three species were found in Vietnam, namely O. japonica, O. subovalis and O. perjaponica comb. nov. The two last species are new taxa for the diatom flora of Vietnam. A new species is described from Laos, O. voronkinae sp. nov., and its morphology is documented with light and scanning electron microscopy. Oricymba voronkinae sp. nov. represents the first documented occurrence of the genus Oricymba in Laos. Our findings provide new information about the morphology and species distribution of the genus Oricymba in Indochina. We discuss the systematic position of Oricymba within the Cymbellales.

Marine rotifers from the Northern Adriatic Sea, with description of Lecane insulaconae sp. nov. (Rotifera: Monogononta: Lecanidae)

2008 ◽  
Vol 88 (2) ◽  
pp. 253-258 ◽  
Author(s):  
Diego Fontaneto ◽  
Hendrik Segers ◽  
Giulio Melone
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Adriatic Sea ◽  
Sandy Sediment ◽  
Northern Adriatic Sea ◽  
Northern Adriatic ◽  
A New Species ◽  
Marine Rotifers ◽  
Scanning Electron

During a survey of the marine rotifers of the Northern Adriatic Sea, Italy, we found a total of 20 taxa, including a new species of Lecane. This novelty, Lecane insulaconae sp. nov., occurred in the interstitial area of sandy sediment in the outlet of the Isonzo River, at a salinity of 30‰ and is therefore the first exclusively marine representative of this diverse (~200 species) genus. It is characterized by unique sets of anterolateral projections on the ventral and dorsal lorica. Here, we present the description of the species, together with scanning electron microscopy pictures of trophi of this and some other species, and an account of the marine rotifers encountered during the survey.

Frankophila dalevittii, a new freshwater diatom (Bacillariophyta) from Campbell Island

Phytotaxa ◽  
2020 ◽  
Vol 429 (1) ◽  
pp. 57-64
Author(s):  
BART VAN DE VIJVER ◽  
PETRA BALLINGS ◽  
CHARLOTTE GOEYERS
Keyword(s):  
New Species ◽  
Morphological Analysis ◽  
New Taxon ◽  
Diatom Flora ◽  
Southern Pacific Ocean ◽  
Electron Microscopical ◽  
Campbell Island ◽  
A New Species ◽  
Scanning Electron ◽  
Freshwater Diatom

During a survey of the freshwater diatom flora of the sub-Antarctic Campbell Island, located in the southern Pacific Ocean, an unknown freshwater diatom was observed forming long colonies using linking spines. Detailed morphological analysis based on light and scanning electron microscopical observations and comparison with all known Frankophila taxa worldwide justified the description of this unknown taxon as a new species within the genus Frankophila: Frankophila dalevittii Van de Vijver & Goeyers sp. nov. The new taxon is characterized by the presence of well-developed linking spines, the absence of external raphe slits and the presence of internal raphe slits, biseriate striae composed of relatively large areolae and a large axial area. Despite the absence of the external raphe slits, the species is best placed within the genus Frankophila. The new species is described and illustrated and compared with all other Frankophila taxa.

scholarly journals Berkeleya Transfretana sp. Nov., a New Marine Diatom from Ceuta (North Africa)

2021 ◽  
Vol 9 (2) ◽  
pp. 146
Author(s):  
Adriana Olenici ◽  
Francisco Jiménez-Gómez ◽  
Saúl Blanco
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
North Africa ◽  
Coastal Area ◽  
Marine Diatom ◽  
A New Species ◽  
Scanning Electron

The diatom Berkeleya transfretana is described as a new species from samples collected at Playa Punta Sauciño, an intertidal coastal area in Ceuta, North Africa. Its main features are the comparatively small size in relation to other Berkeleya species and the very fine and dense striae pattern (more than 40 striae per 10 µm). The new species is here described under light and scanning electron microscopy and compared to related taxa. The benthos of these rocky beaches are interesting spots of biodiversity still to be explored.

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