Roeslerina gen. nov. (Caliciales, Caliciaceae), an ally of Roesleria and Coniocybe

1984 ◽  
Vol 62 (12) ◽  
pp. 2514-2519 ◽  
Author(s):  
S. A. Redhead
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Morphological Features ◽  
Surface Ornamentation ◽  
Scanning Electron

Rosleria subterranea (Weinmann) Redhead comb, nov., commonly cited as R. hypogaea Thüm. & Pass, or R. pallida (Pers.) Sacc, is shown to have septate, pigmented ascospores. Roeslerina gen. nov. is proposed for R. radicella sp. nov. and R. microspora sp. nov., species with aseptate pigmentless spores. Scanning electron microscope photographs of all three reveal surface ornamentation that supports the inclusion of the species in the Caliciaceae based on other gross morphological features.

Composition of the genus Loricella (Mollusca: Polyplacophora: Loricidae) and the description of two new species

Zootaxa ◽  
2021 ◽  
Vol 4981 (2) ◽  
pp. 275-300
Author(s):  
BORIS SIRENKO
Keyword(s):  
Electron Microscope ◽  
New Species ◽  
Scanning Electron Microscope ◽  
Central Area ◽  
Dorsal Side ◽  
Morphological Features ◽  
Related Genus ◽  
Mouth Region ◽  
Two New Species ◽  
Scanning Electron

The genus chiton Loricella is revised. It comprises nine species. Two of these species, L. neoguinensis n. sp. and L. solomonensis n. sp., are described as new. Based on the analysis of morphological features studied using a scanning electron microscope, a revised diagnosis of the genus is provided. The characters diagnostic for this that distinguish it from the related genus Squamophora are as follows: a tubular hollow inside the dorsal scales, bristles on the dorsal side of the girdle, a wide ventral mouth region, a narrow mantle fold covered with simple longitudinally ribbed scales, smooth ventral scales, pits arranged in longitudinal rows in the central area of the tegmentum, and a bicuspid head of the major lateral teeth of the radula. 

scholarly journals Contribution to the systematic knowledge of endemic Aubrieta pinardii Boiss. (Brassicaceae) from Turkey

2020 ◽  
Vol 27 (1) ◽  
pp. 27-35
Author(s):  
Emrah Şirin ◽  
Mehmet Cengiz Karaismailoğlu
Keyword(s):  
Electron Microscope ◽  
Chromosome Number ◽  
Scanning Electron Microscope ◽  
Geographical Distribution ◽  
Anatomical Structures ◽  
Seed Surface ◽  
Cytological Data ◽  
Surface Ornamentation ◽  
Systematic Knowledge ◽  
Scanning Electron

The aim of this study was to document the taxonomical, morphological, anatomical, palynological and cytological characters, and geographical distribution of endemic Aubrieta pinardii Boiss. (Brassicaceae) from Turkey. The description of the taxon was revised as a consequence of comprehensive assessments of many specimens. The surface pictures belonging to seed and pollen of the taxon were obtained by Scanning Electron Microscope. The seed surface ornamentation was rugose. The pollen was radially and isopolar and prolate in forms, with polar axes of 19.52 ± 0.29 μm and equatorial axes of 13.04 ± 0.22 μm, with oval outlines in the equatorial axes, and elliptical in the polar axes. They were three–colpate and colpus sizes varied between 12.98 μm and 13.29 μm in length, and between 1.33 and 2.09 μm in width. Also, the anatomical structures of the root, stem and leaf of species were studied. In cytological studies, the chromosome number of species was found as 2n = 16 (x =8). This was the first work including taxonomical, morphological (macro and micro), anatomical and cytological data of endemic Aubrieta pinardii. Bangladesh J.Plant Taxon. 27(1): 27-35, 2020 (June)

Perimicropylar filaments in eggs of Cyprinodontidae (Pisces, Teleostei)

1992 ◽  
Vol 70 (5) ◽  
pp. 1064-1068 ◽  
Author(s):  
Omar Thiom Thiaw ◽  
Xavier Mattei
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Animal Pole ◽  
Surface Ornamentation ◽  
Scanning Electron

We used a scanning electron microscope to observe the eggs of eight species of fishes belonging to the Cyprinodontidae: Aphyosemion geryi, Aphyosemion riggenbachi, Aphyosemion splendopleure, Epiplatys ansorgei, Epiplatys chaperi, Epiplatys fasciolatus, Epiplatys spilargyreus, and Fundulosoma thierryi. The secondary envelope organizes ornamentations on its surface, except for a localized zone at the animal pole that corresponds to the micropylar region. In certain species the micropyle closes on contact with water but can be identified by the absence of surface ornamentation in the area. The eggs of these fishes possess adhesive filaments that seem to be distributed over the whole surface. In the species studied here, the adhesive filaments are almost exclusively perimicropylar. In F. thierryi, the filaments are even present in the vestibule.

Morphological features and new description of the fossil species Thalassiosira dolmatovae (Bacillariophyceae)

Phytotaxa ◽  
2013 ◽  
Vol 127 (1) ◽  
pp. 100 ◽  
Author(s):  
ANDREY GLADENKOV
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Morphological Features ◽  
Marine Diatom ◽  
Fossil Species ◽  
Labiate Process ◽  
First Time ◽  
Scanning Electron

Specimens of the Neogene marine diatom Thalassiosira dolmatovae have been studied with a scanning electron microscope for the first time. The observations revealed the morphological features typical of this species including arrangement of different kinds of processes. T. dolmatovae has one single subcentral strutted process, a ring of marginal strutted processes, a labiate process located at the margin and enclosed by two strutted processes. Marginal strutted processes with outward extensions and without inward extensions have internal openings surrounded by 4 satellite pores. The location of a labiate process not on the valve face and the presence of marginal strutted processes with outward extensions indicate that the studied species really belongs to genus Thalassiosira not to genus Shionodiscus. A valid description of T. dolmatovae is given.

Surface ornamentation of the echinoid test and its ecologic significance

Paleobiology ◽  
1976 ◽  
Vol 2 (2) ◽  
pp. 122-130 ◽  
Author(s):  
Susan C. Oldfield
Keyword(s):  
Growth Rate ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Outer Surface ◽  
High Growth ◽  
High Energy ◽  
Low Energy ◽  
Plate Surface ◽  
Surface Ornamentation ◽  
Scanning Electron

A scanning electron microscope survey of the regular echinoid test reveals that the outer surface of its component coronal plates may be sculptured with a fine-relief ornament that is species-characteristic for those species presently surveyed. Structural resemblances in surface ornamentation are more marked in species living in similar habitats than in those species that are apparently phyletically related. Plate ornament is related to skeletal magnesium levels. It is tentatively suggested that low growth rate echinoids that inhabit “low-energy” environments (and exhibit low total skeletal magnesium levels) and “high-energy” habitat-exploiting species with high growth rates (and relatively high skeletal magnesium levels) may have differential patterns of plate growth that can be distinguished by the degree of ornamentation of the plate surface.

Pollinarium morphology of Vincetoxicum (Apocynaceae: Asclepiadoideae) in Turkey

Phytotaxa ◽  
2015 ◽  
Vol 230 (1) ◽  
pp. 22 ◽  
Author(s):  
SEHER GÜVEN ◽  
SERDAR MAKBUL ◽  
KAMİL COSKUNCELEBI ◽  
NUR MÜNEVVER PINAR
Keyword(s):  
Electron Microscope ◽  
Numerical Analysis ◽  
Scanning Electron Microscope ◽  
Light Microscope ◽  
Pollen Morphology ◽  
Cell Surfaces ◽  
Pollen Cell ◽  
Surface Ornamentation ◽  
Scanning Electron

In this study, the pollen morphology of 20 representatives of ten taxa of Vincetoxicum from Turkey was observed under a scanning electron microscope and light microscope. Observations showed that each flower contained five pollinaria, including a pair of pollinia and caudicles attached to a central corpusculum. In the investigated taxa, the shape of the pollinium varied from ovate, elliptical, and obovate, to clavate, pollen cell surfaces exhibited gemmate or rugulate ornamentation, and the shape of the corpuscula was ovate or oblong. Numerical analysis showed that the shape of pollinia and corpuscula, size and surface ornamentation of pollen cells, and size of corpuscula and caudicles are valuable traits in delimiting the examined taxa. A key to Turkish Vincetoxicum based on pollinarium morphology is presented.

Redescription of immature stages of central European fireflies, Part 3: Phosphaenus hemipterus (Goeze, 1777) larva, and notes on its life cycle and behaviour, with a key to three central European lampyrid larvae (Coleoptera: Lampyridae)

Zootaxa ◽  
2018 ◽  
Vol 4382 (3) ◽  
pp. 450
Author(s):  
MARTIN NOVÁK
Keyword(s):  
Electron Microscope ◽  
Life Cycle ◽  
Scanning Electron Microscope ◽  
Morphological Features ◽  
Immature Stages ◽  
Sense Organs ◽  
Predatory Behaviour ◽  
Mature Larva ◽  
Central European ◽  
Scanning Electron

The mature larva of the elusive firefly Phosphaenus hemipterus (Goeze, 1777) is thoroughly redescribed and illustrated with detailed images, including scanning electron microscope figures. The external sense organs and their significance is discussed, as well as the predatory behaviour and specific lifestyle of the larva. A key to the central European lampyrid larvae (viz. P. hemipterus, Lamprohiza splendidula (Linnaeus, 1767) and Lampyris noctiluca (Linnaeus, 1758)) is provided as well as a comparative table of their morphological features. 

The Alteration of the Pore Spaces in Sandstones

1973 ◽  
Vol 31 ◽  
pp. 210-211
Author(s):  
R. E. Ferrell ◽  
G. G. Paulson
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
The Other ◽  
Coarse Grained ◽  
Depositional Fabric ◽  
Soluble Components ◽  
Scanning Electron ◽  
Shape And Size

The pore spaces in sandstones are the result of the original depositional fabric and the degree of post-depositional alteration that the rock has experienced. The largest pore volumes are present in coarse-grained, well-sorted materials with high sphericity. The chief mechanisms which alter the shape and size of the pores are precipitation of cementing agents and the dissolution of soluble components. Each process may operate alone or in combination with the other, or there may be several generations of cementation and solution.The scanning electron microscope has ‘been used in this study to reveal the morphology of the pore spaces in a variety of moderate porosity, orthoquartzites.

The Broad Applications of the Scanning Electron Microscope

1969 ◽  
Vol 27 ◽  
pp. 20-21
Author(s):  
C. T. Nightingale ◽  
S. E. Summers ◽  
T. P. Turnbull
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Light Microscopy ◽  
Surface Topography ◽  
Great Depth ◽  
Resolving Power ◽  
Depth Of Field ◽  
Pictorial Representations ◽  
Scanning Electron

The ease of operation of the scanning electron microscope has insured its wide application in medicine and industry. The micrographs are pictorial representations of surface topography obtained directly from the specimen. The need to replicate is eliminated. The great depth of field and the high resolving power provide far more information than light microscopy.

Sign in / Sign up

Export Citation Format

Share Document