scholarly journals Calymperaceae, a new family to the bryological flora of Uruguay

2020 ◽  
Vol 55 (3) ◽  
pp. 359-367
Author(s):  
Richard A Cabral ◽  
Maria S. Jimenez ◽  
Guillermo M. Suárez
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
National Park ◽  
Distribution Map ◽  
New Family ◽  
First Time ◽  
Scanning Electron

Background and aims. The aim of this work was to increase the knowledge of the bryoflora in Uruguay based on the analysis of samples collected in Fortaleza Santa Teresa National Park (Uruguay). M&M. Specimens were collected, processed and analyzed morphologically using conventional techniques for bryophytes. Microscopic characters were observed and illustrated with light microscopy (LM) and scanning electron microscopy (SEM). Results. Calymperaceae Kindb. is recorded for the first time to the country, represented by Syrrhopodon gaudichaudii Mont. This species is characterized by leaves strongly crispate when dry, and margins smooth to dentate at the apex. Conclusions. A detailed description, illustrations with SEM and LM, and a distribution map of S. gaudichaudii is here presented.

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 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.

Redescription of Lamproglena Clariae Fryer, 1956 (Copepoda, Lernaeidae), With Notes On Its Occurrence and Distribution

Crustaceana ◽  
1996 ◽  
Vol 69 (4) ◽  
pp. 509-523 ◽  
Author(s):  
A. Avenant-Oldewage ◽  
Hazel M. Marx
Keyword(s):  
Electron Microscopy ◽  
South Africa ◽  
Scanning Electron Microscopy ◽  
National Park ◽  
Kruger National Park ◽  
Gill Parasite ◽  
Morphological Findings ◽  
Olifants River ◽  
First Time ◽  
Scanning Electron

AbstractThe morphology of the gill parasite Lamproglena clariae Fryer, 1956, from the Olifants River, Kruger National Park, South Africa, was studied with the aid of light and scanning electron microscopy. Ultrastructural details of all appendages are given as well as a table and map with information on the occurrence and distribution of L. clariae in Africa. Important morphological findings include: the observation of only one claw on the maxilla; first time findings and descriptions of the nuchal organ, upper and lower lips, the fifth pair of legs and circular openings on all appendages.

Redescription of Monodontella giraffae Yorke et Maplestone, 1926 (Nematoda, Ancylostomatidae) from a giraffe, Giraffa camelopardalis, from Zoo in China, with a discussion on the taxonomic status of Monodontella

2010 ◽  
Vol 55 (1) ◽  
Author(s):  
Zhu Ming ◽  
Li Zhang ◽  
Luping Zhang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
Taxonomic Status ◽  
Biliary Duct ◽  
Giraffa Camelopardalis ◽  
Genital Cone ◽  
First Time ◽  
Scanning Electron

AbstractMonodontella giraffae Yorke et Maplestone, 1926 was collected from the biliary duct of liver of a dead giraffe, Giraffa camelopardalis (Linnaeus) from the Tianjin Zoo, Tianjin, China. A redescription of this species was made using light microscopy and scanning electron microscopy (SEM). The lateral alae and the detailed structures of the spicules and genital cone were observed for the first time by SEM. The taxonomic status of the genus is discussed.

scholarly journals Spinnerets and silk-producing system of Segestria senoculata (Araneae, Araneomorphae, Segestriidae)

2016 ◽  
Vol 48 (3) ◽  
pp. 388 ◽  
Author(s):  
S. Karschová ◽  
J. Hajer
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
Current Knowledge ◽  
The Other ◽  
Sem Study ◽  
First Time ◽  
Scanning Electron

The spinning apparatus and silk of <em>Segestria senoculata</em> were studied with the use of scanning electron microscopy and light microscopy, which confirmed the presence of four categories of spigots connected with four types of spinning glands (<em>i.e</em>., <em>Glandulae ampullaceae major, Glandulae ampullaceae minor, Glandulae piriformes and Glandulae pseudaciniformes</em>). New data about the morphology of spinnerets and spigots were obtained for both the adults and nymphal stages of both sexes. For the first time the silken threads of retreats, signal threads and attachment discs of the members of <em>Segestria</em> were subjected to a detailed SEM study. The data resulting from studying the spinning apparatus of <em>S. senoculata</em> was compared to current knowledge of the silk producing systems of families belonging to the Dysderoidea superfamily. Silks that are emitted from spigots in the course of retreat construction are not (similarly to the other dysderoids) processed by the spider’s legs during the subsequent process of hardening. Apart from the major ampullate glands/spigots, segestriids also possess developed minor ampullate glands. Minor ampullate threads are used by <em>S. senoculata</em> spiders when making their signal threads.

scholarly journals The eastern Nearctic species Rasvena terna (Frison, 1942) (Plecoptera, Chloroperlidae)

Check List ◽  
2018 ◽  
Vol 14 (4) ◽  
pp. 657-663
Author(s):  
Scott A. Grubbs ◽  
Mwenda M. Singai
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Species Range ◽  
Adult Males ◽  
Distribution Map ◽  
Reproductive Structures ◽  
Adult Females ◽  
First Time ◽  
Microscopy Images ◽  
Scanning Electron

New and prior valid records of the endemic eastern Nearctic species Rasvena terna (Frison, 1942) were compiled and a dot distribution map is provided. Rasvena terna is reported from Canada (Quebec) for the first time. External reproductive morphology of adult males and adult females were studied across this species range. Scanning electron microscopy images of reproductive structures and the larval mandible are presented for the first time.

Morphology and chaetotaxy of the first instar larva of the scorpionfly Sinopanorpa tincta (Mecoptera: Panorpidae)

Zootaxa ◽  
2011 ◽  
Vol 2897 (1) ◽  
pp. 18 ◽  
Author(s):  
HONG-MIN CHEN ◽  
BAO-ZHEN HUA
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
Instar Larva ◽  
First Instar ◽  
First Time ◽  
Scanning Electron

The morphology and chaetotaxy of the first instar larva of the scorpionfly Sinopanorpa tincta (Navás, 1931) are described and illustrated for the first time with the aid of light microscopy and scanning electron microscopy, with particular attention to the mouthparts and their sensilla. A comparison is made with the larvae of other known Mecoptera, especially Panorpa and Neopanorpa in Panorpidae.

scholarly journals Description of the glochidium of Margaritifera auricularia (Spengler 1793) (Bivalvia, Unionoidea)

1998 ◽  
Vol 353 (1375) ◽  
pp. 1553-1559 ◽  
Author(s):  
R. Araujo ◽  
M. A. Ramos
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
Histological Techniques ◽  
Oral Plate ◽  
The Family ◽  
Anterior Position ◽  
First Time ◽  
Margaritifera Auricularia ◽  
Scanning Electron

The glochidium of Margaritifera auricularia is described for the first time by using light microscopy, scanning electron microscopy and histological techniques. The larval mantle is formed by only two layers of cells; the inner one being much thicker, with microvilli. All cell masses of the glochidium are temporary aggregations that are the rudiments of organs of the subsequent juveniles which will be released after metamorphosis in the host tissues. In the glochidium there are three main masses of cells: (i) the muscle, which is in an anterior position; (ii) the oral plate in the centre of the larva; and (iii) the more ventrally and posteriorly situated ventral plate, or foot rudiment, flanged with lateral pits all bearing dense cilia. No rudimentary organs such as the pericardium, the kidney, the heart or nerve ganglia have developed. There are no visible hooks in the valve margins, but by using light microscopy we observed minute teeth covered by a rim of the periostracum. Near the margin of the shell there are two pairs of sensory hair tufts only observable by scanning electron microscopy. The glochidium of M. auricularia is the largest of the family Margaritiferidae and intermediate between the glochidium of the known species of this family and those of Unionidae.

scholarly journals Morphology of pollen grains of Weigela floribunda (Caprifoliaceae): application in taxonomy

2021 ◽  
pp. 299-304
Author(s):  
Z. M. Tsymbalyuk ◽  
L. M. Nitsenko ◽  
S. L. Mosyakin
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
Pollen Morphology ◽  
Pollen Grains ◽  
Polar View ◽  
Equatorial View ◽  
First Time ◽  
Qualitative Characteristics ◽  
Scanning Electron

The aim of this research was to provide detailed quantitative and qualitative characteristics on pollen grains of Weigela floribunda (Siebold & Zucc.) K. Koch (Caprifoliaceae) as applied for taxonomy. Pollen morphology of W. floribunda was studied using both light microscopy and scanning electron microscopy. Pollen grains are 3-porate, rarely 4-porate, suboblate to spheroidal (P/E=0.80–1.05); in equatorial view elliptic or circular, in polar view circular or subcircular; medium- or large-sized (P=42.56–61.18 µm, E=42.56–66.50 µm). Pores are circular with distinct or indistinct margins and distinct annuli. Exine sculpture is echinate-microechinate-nanoechinate. Pollen grains of W. flori- bunda were analyzed for the first time in the present study.

Structure of corystospermaceous ovules from the Upper Triassic of Zimbabwe

Botany ◽  
2009 ◽  
Vol 87 (9) ◽  
pp. 854-863 ◽  
Author(s):  
Georges Barale ◽  
Gaëtan Guignard ◽  
Marion K. Bamford
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Light Microscopy ◽  
Pollen Grains ◽  
Upper Triassic ◽  
Transmission Electron ◽  
Time Scanning ◽  
First Time ◽  
Scanning Electron

Isolated ovules from the Upper Triassic of Zimbabwe were observed using three complementary approaches: light microscopy and, for the first time, scanning electron microscopy and transmission electron microscopy. Complete ovules showed a curved bifid micropylar tube. Three envelopes were present: integument, nucellus, and megaspore. The integument appeared resiniferous. The nucellus was made up of bulging cells around the pollen chamber, which contained bisaccate pollen grains. The ultrastructure of the nucellus revealed a lamellar organization in their microsinuosities. The megaspore membrane was made up of agglomerate rounded bodies more or less closely arranged and surrounded by two layers. The material may be attributed to Umkomasiaceae. A comparison with ovules of different related groups (seed ferns, Caytoniales, Ginkgoales, Nilssoniales, and Coniferales) was made. The Umkomasiales are considered to be a more primitive group than the Pteridospermales with regard to integument and nucellus.

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