Petalomonas sphagnophila (Euglenophyta, Petalomonadales), a new euglenophyte species for Russia

2016 ◽  
Vol 50 ◽  
pp. 112-119
Author(s):  
D. A. Kapustin ◽  
D. A. Philippov ◽  
I. V. Sokolova ◽  
E. S. Gusev
Keyword(s):  
Light Microscopy ◽  
Original Publication ◽  
Raised Bog ◽  
Vologda Region ◽  
First Time

Petalomonas sphagnophila has been found for the first time in Russia from the Shichengskoe raised bog (Vologda Region). Morphology of the species is studied by means of light microscopy and illustrated by original micrographs. The data on its taxonomy, ecology and distribution are given. The name P. sphagnophila was not validly published because no type was indicated in the original publication (Christen, 1962), so we are validating the name by indicating its holotype. P. polytaphrena Skuja, nom. inval. is treated as a synonym of P. sphagnophila. Currently, thirty species of the genus Petalomonas, including P. sphagnophila, are known from Russia.

scholarly journals Petal and Sepal Epidermal Micromorphology of Six Lathyrus Taxa (Fabaceae) and their Systematic Value

2012 ◽  
Vol 40 (1) ◽  
pp. 35 ◽  
Author(s):  
Hüseyin CILDIR ◽  
Ahmet KAHRAMAN ◽  
Musa DOGAN
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
Glandular Trichomes ◽  
Systematic Significance ◽  
Trichome Types ◽  
First Time ◽  
Scanning Electron

In this study, the epidermal types and their distribution on dorsal and lateral petals, the trichome types and their density on sepals of Lathyrus chloranthus, L. digitatus, L. laxiflorus subsp. laxiflorus, L. roseus subsp. roseus, L. sativus, and L. tuberosus, belonging to sections Lathyrus, Lathyrostylis, Pratensis, and Orobon of the genus Lathyrus in Turkey were investigated using light microscopy (LM) and scanning electron microscopy (SEM), and the systematic significance of these characters was evaluated. These taxa, except L. sativus, are studied for the first time under aspects of the petal and sepal micromorphology. Three major epidermal types were recognized on the petal: tabular rugose striate cells (TRS), areolate cells with more or less striations (AS), and papillose conical striate cells (PCS). TRS and AS were further subdivided into three subtypes. TRS was found on the dorsal and lateral petals of L. chloranthus, L. sativus, and L. tuberosus: the dorsal petals of L. roseus subsp. roseus and the lateral petals of L. laxiflorus subsp. laxiflorus, while AS was present on the dorsal and lateral petals of L. digitatus and the lateral petals of L. roseus subsp. roseus. PCS was found only on the dorsal petals of L. digitatus. Three main types of trichomes on the sepal were observed: peltate glandular, capitate glandular, and nonglandular trichomes. The capitate glandular and nonglandular trichomes were further subdivided into three subtypes. The peltate glandular trichomes were present only in L. chloranthus, but absent in the others. The capitate glandular trichomes were found in L. chloranthus, L. laxiflorus subsp. laxiflorus, L. roseus subsp. roseus, and L. tuberosus. The nonglandular trichomes were always present in L. chloranthus and L. laxiflorus subsp. laxiflorus. The present results show that the petal and sepal micromorphology can be used in delimitation of the taxa based on petal and sepal micromorphology.

scholarly journals The Behaviour of Skylarks

2021 ◽  
Author(s):  
Juan D. Delius ◽  
Julia A. M. Delius
Keyword(s):  
Relevant Literature ◽  
Original Publication ◽  
Breeding Seasons ◽  
First Time

A population of individually marked skylarks was studied by Juan D. Delius over four breeding seasons in Ravenglass, Cumbria, England. The original publication of his findings on their behaviour was published in German (Delius, 1963). Here, the article is presented in English for the first time, with updates of the relevant literature.

scholarly journals Pollen morphology of the Balkan-Carpathian endemic Campanula lingulata Waldst. & Kit. (Campanulaceae)

2016 ◽  
pp. 75-82
Author(s):  
Marina Macukanovic-Jocic ◽  
Snezana Jaric
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
Endemic Species ◽  
Pollen Morphology ◽  
Average Length ◽  
Pollen Grains ◽  
Polar Axis ◽  
First Time ◽  
Scanning Electron

Palynomorphological characteristics of Campanula lingulata, the Balkan-Carpathian endemic species growing in Serbia, have been investigated using light microscopy and scanning electron microscopy for the first time, in order to provide some information helpful for a better understanding of the taxonomic position of this species within the genus, as well as to contribute to the pollen atlas of Serbian apiflora. The pollen grains are radially symmetrical, isopolar, 3-zonoporate and medium-sized monads oblate-sphaeroidal in shape. Mean of the polar axis (P) is 27.6?1.9 ?m, while the average length of the equatorial axis (E) is 28.8?1.6 ?m. The apertures are operculate. The sculpturing pattern of the exine is microre?ticulate-microechinatae. The exine surface is covered with evenly distributed supratectal spinules of variable length and sparse granules. The longest supratectal spinules are 0.64?0.05 ?m in length and the smallest sculptural elements are less than 0.2 ?m high. The microechinae density per sample area of 5 ?m x 5 ?m averages 17.4?2.4.

Patterns of Abnormal Myogenesis in Human Cleft Palates

1994 ◽  
Vol 31 (5) ◽  
pp. 345-350 ◽  
Author(s):  
Steven R. Cohen ◽  
Lynn L. Chen ◽  
Alphonse R. Burdi ◽  
Carroll-Ann Trotman
Keyword(s):  
Light Microscopy ◽  
Cleft Palate ◽  
Muscle Fiber ◽  
Soft Palate ◽  
Crown Rump Length ◽  
Levator Veli Palatini ◽  
Myotube Formation ◽  
Preliminary Study ◽  
Mesenchymal Condensation ◽  
First Time

To test the hypothesis that soft palate muscles are abnormal in cleft palate, we compared soft palate morphogenesis in fetuses with cleft palate (n=4) to age-matched (n=3) and nonmatched (n=1) control specimens. The morphologic status of all soft palate and masticatory structures were classified into one of six stages based on the level of histogenesis. At 54 mm crown-rump length (CRL), the levator veli palatini (L), palatopharyngeus (PP), and palatoglossus (PG) in cleft subjects demonstrated mesenchymal condensation into myoblastic fields, lagging behind the control specimens (97 mm CRL), which displayed definitive fields of myoblasts and myotube formation. In the 175 mm and 225 mm cleft and the 170 mm and 192 mm control specimens, muscular morphology was similar and had reached its postnatal appearance for the tensor veli palatini (175 m only) and L, PP, PG (225 mm only). Muscle fiber directions were, however, disoriented and disorganized, especially close to the medial epithelial edge of the cleft. The levator veli palatini, could not be distinguished as a discrete muscle in the cleft specimens, and what we believed to be the PP and PG seemed “normal” at the level of light microscopy, but malpositioned in a superior direction. This preliminary study demonstrates for the first time that early myogenesis in cleft palates differs from normal.

scholarly journals Periphytic Actinella Lewis (Ochrophyta, Bacillariophyceae) species from an Environmental Protection Area in the Brazilian Amazon

2018 ◽  
Vol 30 (0) ◽  
Author(s):  
Luís Gustavo de Castro Canani ◽  
Rebecca da Silva Fraia ◽  
Sérgio de Melo
Keyword(s):  
Light Microscopy ◽  
Environmental Protection ◽  
Brazilian Amazon ◽  
Acidic Ph ◽  
Diagnostic Features ◽  
Negro River ◽  
River Region ◽  
Environmental Protection Area ◽  
Protection Area ◽  
First Time

Abstract Aim The aim of this study is to present the Actinella species found in periphytic samples collected from an Environmental Protection Area in Santarém (PA, Brazil), to comment on their morphology by comparing them with existing records, and to increase knowledge of the distribution of the genus in Pará State. Methods Ten periphytic samples were collected from seven sampling stations in the Alter do Chão Environmental Protection Area (Santarém, Pará, Brazil) in October 2015 and February and July 2016. Dissolved oxygen, pH, conductivity and water temperature were measured in the field at sites from which samples were collected in 2016. Samples were oxidized and analyzed by light microscopy. Results The sampled water bodies presented low conductivity and an acidic pH. We identified 12 Actinella taxa, several of which had originally been described from samples collected from the Amazon in the mid-20th century, mainly in the lower Tapajós River region. Actinella rionegrensis is recorded for the first time in the State of Pará, outside of its type locality (Negro River, near Manaus, AM, Brazil), and the species habitus (wisp-shaped colonies) is recorded for the first time. Conclusion Our results indicate that the Environmental Protection Area has been effective in conserving the aquatic ecosystem, since Actinella species identified in the mid-20 th century are still present. Taxonomic issues for some species of this genus need clarification and revision, since overlapping diagnostic features occur among species and with species belonging to the genus Eunotia.

scholarly journals Synopsis and typification of the names published by Antonio Bertoloni in Florula Guatimalensis and in preceding publications

Phytotaxa ◽  
2019 ◽  
Vol 420 (3) ◽  
pp. 199-223
Author(s):  
RICCARDO M. BALDINI ◽  
ANA LUCRECIA MACVEAN ◽  
GIOVANNI CRISTOFOLINI ◽  
THOMAS F. DANIEL ◽  
ANNALISA MANAGLIA ◽  
...  
Keyword(s):  
New Taxa ◽  
Original Material ◽  
New Combinations ◽  
Original Publication ◽  
First Time ◽  
Original Drawings

Bertoloni published Florula guatimalensis in 1840, which is commonly cited as the original publication. However, our findings show that previous publications of Alessandrini of 1838 and 1840 include the original descriptions by Bertoloni which predate Florula guatimalensis. Among the 60 new taxa authored by Bertoloni, 26 were published in 1838 and 34 in 1840 by Alessandrini. Additionally, original drawings were discovered inside an old copy of Bertoloni’s Florula guatimalensis. Also a comparison between the original material from Bertoloni’s herbarium and his original drawings is here reported for the first time. The collection of Guatemalan plants studied by Antonio Bertoloni preserved at BOLO was analysed and is here discussed. The new combinations Odontonema corymbulosum and Lamourouxia barbata are proposed. A neotype for Aristolochia podocarpa and an epitype for Philadelphus myrtoides are here designated.

The morphology of an unique population of Corynosoma strumosum (Acanthocephala, Polymorphidae) from the Caspian seal, Pusa caspica, in the land-locked Caspian Sea using SEM, with special notes on histopathology

2011 ◽  
Vol 56 (4) ◽  
Author(s):  
Omar Amin ◽  
Richard Heckmann ◽  
Ali Halajian ◽  
Atif El-Naggar
Keyword(s):  
Light Microscopy ◽  
Caspian Sea ◽  
Young Male ◽  
Host Tissue ◽  
Isolated Population ◽  
Sem Images ◽  
Intestinal Villi ◽  
Proboscis Hook ◽  
First Time ◽  
Caspian Seal

AbstractOver 700 specimens of Corynosoma strumosum (Rudolphi, 1802) Lühe, 1904 were collected from one young male Caspian seal, Pusa caspica (Gmelin) in the southern land-locked Caspian Sea in April, 2009. Collected worms showed consistent variations from those reported by other observers using light microscopy especially in proboscis hook and trunk spine patterns. SEM images revealed many features that have not been previously reported including the shape and distribution of trunk spines, dorsoventral differences in proboscis hooks and their organization, the baldness of anterior proboscis, the rough egg topography, epidermal micropores, and variations in the female gonopore. This isolated population of C. strumosum from the land-locked Caspian Sea is distinguished from others reported from open waters elsewhere by the distribution of trunk spines, consistently smaller size of trunk and testes, larger eggs, and fewer proboscis hooks. Histopathological sections reveal the invasive path of worms in host tissue with damage to intestinal villi and worm encapsulation. Information obtained from SEM studies and histopathological sections is reported for the first time.

scholarly journals First description of the males of Aphelenchoides limberi Steiner, 1936 (Nematoda: Aphelenchina)

2012 ◽  
Vol 49 (3) ◽  
pp. 181-186 ◽  
Author(s):  
V. Čermák ◽  
L. Háněl ◽  
V. Gaar ◽  
O. Douda
Keyword(s):  
Czech Republic ◽  
Light Microscopy ◽  
Botrytis Cinerea ◽  
Lateral Field ◽  
First Time

AbstractMales of Aphelenchoides limberi are described and illustrated for the first time from mushroom plate cultures of Botrytis cinerea. The original parthenogenetic population was extracted from the soil of a hop garden in Senice na Hané, Czech Republic. The males are characterized by a stylet about 11 μm long, a prominent spicula, with the dorsal limb longer than the ventral limb, and a ventrally curved tip. The tail is arcuate, conoid, ending with a short, mostly ventrally bent hook-shaped mucro, the lateral field appears to have four lines under light microscopy.

scholarly journals Kinetochores capture astral microtubules during chromosome attachment to the mitotic spindle: direct visualization in live newt lung cells.

1990 ◽  
Vol 111 (3) ◽  
pp. 1039-1045 ◽  
Author(s):  
J H Hayden ◽  
S S Bowser ◽  
C L Rieder
Keyword(s):  
Light Microscopy ◽  
Mitotic Spindle ◽  
Dynamic Instability ◽  
Lung Cells ◽  
Polar Regions ◽  
Clear Area ◽  
Chromosome Attachment ◽  
Initial Interaction ◽  
Favorable Conditions ◽  
First Time

When viewed by light microscopy the mitotic spindle in newt pneumocytes assembles in an optically clear area of cytoplasm, virtually devoid of mitochondria and other organelles, which can be much larger than the forming spindle. This unique optical property has allowed us to examine the behavior of individual microtubules, at the periphery of asters in highly flattened living prometaphase cells, by video-enhanced differential interference-contrast light microscopy and digital image processing. As in interphase newt pneumocytes (Cassimeris, L., N. K. Pryer, and E. D. Salmon. 1988. J. Cell Biol. 107:2223-2231), centrosomal (i.e., astral) microtubules in prometaphase cells appear to exhibit dynamic instability, elongating at a mean rate of 14.3 +/- 5.1 microns/min (N = 19) and shortening at approximately 16 microns/min. Under favorable conditions the initial interaction between a kinetochore and the forming spindle can be directly observed. During this process the unattached chromosome is repeatedly probed by microtubules projecting from one of the polar regions. When one of these microtubules contacts the primary constriction the chromosome rapidly undergoes poleward translocation. Our observations on living mitotic cells directly demonstrate, for the first time, that chromosome attachment results from an interaction between astral microtubules and the kinetochore.

scholarly journals First record of epibionts peritrichids and suctorians (Protozoa, Ciliophora) on Pomacea lineata (Spix, 1827)

2006 ◽  
Vol 49 (5) ◽  
pp. 807-812 ◽  
Author(s):  
Roberto Júnio Pedroso Dias ◽  
Sthefane D'Ávila ◽  
Marta D'Agosto
Keyword(s):  
Light Microscopy ◽  
Trophic Interactions ◽  
First Record ◽  
Ciliate Protozoan ◽  
Protozoan Community ◽  
Protozoa Ciliophora ◽  
First Time

This study made a survey on the ciliate protozoans from Peritrichid and Suctorian taxa, epibionts of Pomacea lineata (Spix, 1827) (Ampullariidae). Fifty mollusks were collected in places of irrigation ditches and shell was scraped with a scalpel and the extracted material was analyzed in vivo by light microscopy. All examined mollusks presented epibiont ciliates on their shells. For the first time epibiont ciliates in P. lineata was record. Seven genera of ciliates: five peritrichids and two suctorians, were identified and classified within the subclass Peritrichia: Carchesium Ehrenberg, 1838 (Vorticellidae), Epistylis Ehrenberg, 1830 (Epistylidae), Opercularia Stein, 1854 (Operculariidae), Vaginicola Lamarck, 1816 (Vaginicolidae) and Vorticella Linnaeus, 1767 (Vorticellidae); and Suctoria: Acineta Ehrenberg,1834 (Acinetidae) and Tokophrya Bütschli,1889 (Tokophrydae). The results showed that P. lineata constitute the microenvironment of a ciliate protozoan community that presents complex trophic interactions.

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