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.

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.

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.

scholarly journals Antimicrobial Resistance in Loggerhead Sea Turtles (Caretta caretta): A Comparison between Clinical and Commensal Bacterial Isolates

Animals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2435
Author(s):  
Adriana Trotta ◽  
Mariarosaria Marinaro ◽  
Alessio Sposato ◽  
Michela Galgano ◽  
Stefano Ciccarelli ◽  
...  
Keyword(s):  
Adriatic Sea ◽  
Caretta Caretta ◽  
Clinical Isolates ◽  
Bacterial Isolates ◽  
Free Living ◽  
Loggerhead Sea Turtles ◽  
Reservoir Species ◽  
History Of ◽  
Amoxicillin Clavulanic Acid ◽  
Gram Negative Organisms

Gram negative organisms are frequently isolated from Caretta caretta turtles, which can act as reservoir species for resistant microorganisms in the aquatic environment. C. caretta, which have no history of treatment with antimicrobials, are useful sentinel species for resistant microbes. In this culture-based study, commensal bacteria isolated from oral and cloacal samples of 98 healthy C. caretta were compared to clinical isolates from the wounds of 102 injured animals, in order to investigate the presence of AMR bacteria in free-living loggerheads from the Adriatic Sea. A total of 410 isolates were cultured. Escherichia coli and genera such as Serratia, Moraxella, Kluyvera, Salmonella were isolated only in healthy animals, while Acinetobacter, Enterobacter, Klebsiella and Morganella were isolated only from the wounds of the injured animals. When tested for susceptibility to ampicillin, amoxicillin + clavulanic acid, ceftazidime, cefuroxime, gentamicin, doxycycline, ciprofloxacin and enrofloxacin, the clinical isolates showed highly significant differences in AMR rates vs. commensal isolates for all the drugs tested, except for doxycycline. The detection of high AMR rates in loggerheads is of clinical and microbiological significance since it impacts both the choice of a proper antibiotic therapy and the implementation of conservation programs.

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.

Accumulation of organochlorine contaminants in loggerhead sea turtles, Caretta caretta, from the eastern Adriatic Sea

Chemosphere ◽  
2011 ◽  
Vol 82 (1) ◽  
pp. 121-129 ◽  
Author(s):  
Bojan Lazar ◽  
Luna Maslov ◽  
Snježana Herceg Romanić ◽  
Romana Gračan ◽  
Blanka Krauthacker ◽  
...  
Keyword(s):  
Adriatic Sea ◽  
Sea Turtles ◽  
Caretta Caretta ◽  
Loggerhead Sea Turtles ◽  
Organochlorine Contaminants

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.

scholarly journals Four new species from the diatom (Bacillariophyceae) genus Adlafia Moser, Lange-Bertalot & Metzeltin from waterbodies of Vietnam

PhytoKeys ◽  
2020 ◽  
Vol 162 ◽  
pp. 13-27
Author(s):  
Anton M. Glushchenko ◽  
John Patrick Kociolek ◽  
Irina V. Kuznetsova ◽  
Maxim S. Kulikovskiy
Keyword(s):  
New Species ◽  
Electron Micrographs ◽  
Scanning Electron Micrographs ◽  
Diatom Flora ◽  
Number Of Species ◽  
New Findings ◽  
Diatom Genus ◽  
Scanning Electron

Four species of the diatom genus Adlafia were found from waterbodies of Vietnam and described as new to science. Their formal descriptions are presented herein and they are illustrated by light and scanning electron micrographs. These new species are: A. lamdongiensis Glushch., Kulik. & Kociolek, sp. nov., A. babeiensis Glushch., Kulik. & Kociolek, sp. nov., A. vietnamensis Glushch., Kulik. & Kociolek, sp. nov. and A. dauiensis Glushch., Kulik. & Kociolek, sp. nov. These species are then compared to other similar taxa. Our new findings add to the number of species in this interesting genus and contribute to our understanding of the unique diatom flora found in Vietnam.

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