scholarly journals Morphological and anatomical structure of cypselas of species of the genus Olgaea (Asteraceae: Cardueae)

Turczaninowia ◽  
2021 ◽  
Vol 24 (4) ◽  
pp. 23-46
Author(s):  
Elena V. Novozhilova ◽  
Elvira V. Boyko
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Comparative Analysis ◽  
Anatomical Structure ◽  
Anatomical Features ◽  
The Family ◽  
Scanning Electron ◽  
Shape And Size

This paper is a continuation of a series of our investigation of the morphological and anatomical structure of the cypselas of the family Asteraceae. The article presents the results of an investigation of the morphological and anatomical structure of the cypselas of 6 species of the genus Olgaea Iljin of the tribe Cardueae Cass. (O. baldschuanica (C. Winkl.) Iljin, O. leucophylla (Turcz.) Iljin, O. lomonossowii (Trautv.) Iljin, O. nidulans (Rupr.) Iljin, O. pectinata Iljin, O. tangutica Iljin) by light and scanning electron microscopy (SEM). The carpological examination of the cypselas revealed specific features of the species of the genus Olgaea: the shape of the cypsela, the sculpture of the surface of the pericarp, the absence (or presence) crowns and carpopodium, the ratio of the thickness of the pericarp and exotesta, the number of rows and the nature of thickening of the walls of mesocarp cells, the presence or absence of endocarp, the shape and size of exotesta cells, the coefficient of their palisade (the ratio of the length of the radial walls to the length of the tangent). Cypsela of Olgaea species have significant differences, which indicates the heterogeneity of the genus and the need for its revision. Based on the data obtained and the previously published results of the study (Novozhilova, Boyko, 2019), a comparative analysis of the morphological and anatomical features of the cypsela of representatives of the genera Olgaea and Alfredia Cass. was carried out, which revealed the main differences in the structure of the cypsela of these two genera. It was found that the cypsela Olgaea and Alfredia have different structures, and therefore it is inappropriate to combine them into one genus.

Revision of the family Carabodidae (Acari: Oribatida) XIII. Congocepheus camerunensis sp. nov. from Cameroon and Synkrotima zimbabwae gen. nov., sp. nov. from the Republic of Zimbabwe

2017 ◽  
Vol 22 (11) ◽  
pp. 1822 ◽  
Author(s):  
Nestor Fernandez ◽  
Pieter Daniel Theron ◽  
Sergio Leiva ◽  
Louwrens Tiedt
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
The Family ◽  
The Republic ◽  
Scanning Electron ◽  
Shape And Size

Congocepheus camerunensis sp. nov. from Cameroon and Synkrotima zimbabwae gen. nov., sp. nov. from Zimbabwe are described using optical and Scanning Electron Microscopy (SEM). Congocepheus camerunensis is similar to C. heterotrichus, differentiated by: dissimilarity in shape and length of prodorsal, notogastral, epimeral, agenital, and adanal setae; placement, shape, and size of finger-like projection, bothridial ring and tutorium. Synkrotima zimbabwae gen. nov., sp. nov. is a distinctive species with a more or less flat elevated interlamellar process with longitudinal elevations and an anterior expansion; very complex ventral ornamentations with alternating depressed and elevated zones; genital neotrichy; absence of notogastral depression; the differences in shape and lengths of the prodorsal, notogastral, epimeral, genital, aggenital, adanal and anal setae in comparison to other species of the family Carabodidae. 

scholarly journals Anatomy and trichome micromorphology of Stachys scardica (Griseb.) Hayek (Lamiaceae)

2014 ◽  
Vol 66 (3) ◽  
pp. 1217-1226 ◽  
Author(s):  
Slavica Grujic ◽  
Sonja Duletic-Lausevic ◽  
Ana Dzamic ◽  
P.D. Marin
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Anatomical Structure ◽  
Vegetative Organs ◽  
Anatomical Features ◽  
Leaf Petiole ◽  
Plant Parts ◽  
Peltate Trichomes ◽  
Stem Leaf ◽  
Scanning Electron

The anatomy and micromorphology of the vegetative organs and calyx of Stachys scardica (Griseb.) Hayek were investigated using light (LM) and scanning electron microscopy (SEM). The analysis of the anatomical structure of stem, leaf and leaf petiole showed the presence of an additional adaxial phloem in the vascular bundle of the petiole that was recorded exclusively in species belonging to the subgenus Betonica. On the surface of studied plant parts, three types of trichomes were found: simple nonglandular uniseriate multicellular, nonglandular branched elongated and glandular peltate trichomes. The present study shows that certain micromorphological and anatomical features of Stachys taxa are valuable taxonomic characters.

Ascospore sculpturing and generic concepts in the Testudinaceae (syn. Zopfiaceae)

1979 ◽  
Vol 57 (2) ◽  
pp. 91-99 ◽  
Author(s):  
D. L. Hawksworth
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Combination ◽  
The Family ◽  
First Time ◽  
Scanning Electron

Generic concepts in the Testudinaceae (Ascomycotina, Loculoascomycetes) are reviewed with particular emphasis on the sculpturing of the ascospores which has been examined by scanning electron microscopy (SEM) for the first time. A key to the nine genera accepted in the family is provided of which two are described as new: Ulospora for U. bilgramii comb.nov. (= Zopfia bilgramii D. Hawksw. et al.), the ascospores of which have three to six deep fissures in each cell, and Zopfiofoveola for Z. punctata comb.nov. (= Zopfia punctata D. Hawksw. & C. Booth), with distinctly and regularly foveolate ascospores. One further new combination is made: Rechingeriella boudieri comb.nov. (= Zopfia boudieri Arnaud). The positions of three additional genera referred to the family by earlier authors but which are excluded from it here are also briefly discussed.

New perspectives on Nephridiacanthus major (Acanthocephala: Oligacanthorhynchidae) collected from hedgehogs in Iran

2020 ◽  
Vol 94 ◽  
Author(s):  
O.M. Amin ◽  
M. Sharifdini ◽  
R.A. Heckmann ◽  
M. Zarean
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Phylogenetic Analysis ◽  
Chemical Analysis ◽  
Central Asia ◽  
Molecular Profile ◽  
X Ray ◽  
The Family ◽  
First Time ◽  
Scanning Electron

We describe morphological features not previously reported for this old acanthocephalan Nephridiacanthus major (Bremser, 1811 in Westrumb, 1821) Golvan, 1962 first described over 200 years ago. Our specimens were collected from long-eared hedgehog Hemiechinus auritus (Gmelin, 1770) (Erinaceidae) in Iran. We compare the morphometrics of our material with others previously reported from the same host in Iran, Russia, central Asia and Europe. Our specimens had markedly smaller proboscides, proboscis hooks and lemnisci than those reported from Russia and central Asia, but comparable measurements of other structures with specimens previously described from other collections. We document our new observations with scanning electron microscopy features not previously demonstrable by other observers and provide a chemical analysis of proboscis hooks using energy-dispersive X-ray analysis for the first time. The molecular profile of this acanthocephalan, based on 18S rDNA and cox1 genes, was generated for the first time. The phylogenetic analysis showed that N. major is placed in a clade of the family Oligacanthorhynchidae, well separated from the families Moniliformidae and Gigantorhynchidae.

scholarly journals Fine Structure of Maxillary Palps in Adults of Hermetia illucens (Diptera: Stratiomyidae)

2020 ◽  
Author(s):  
M Pezzi ◽  
C Scapoli ◽  
M Bharti ◽  
M J Faucheux ◽  
M Chicca ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Sexual Dimorphism ◽  
Hermetia Illucens ◽  
The Family ◽  
Sensory Structures ◽  
First Time ◽  
Maxillary Palps ◽  
Scanning Electron

Abstract A relevant species in waste management but also in forensic, medical, and veterinary sciences is the black soldier fly, Hermetia illucens (Linnaeus; Diptera: Stratiomyidae). An ultrastructural study by scanning electron microscopy (SEM) was conducted for the first time on maxillary palps of both sexes, describing in detail the morphology and distribution of sensilla and microtrichia. The maxillary palps, composed of two segments, show sexual dimorphism in length and shape. In both sexes, the first segment is covered only by microtrichia, but the second one is divided into two parts: the proximal one, covered only by microtrichia, and the distal one containing both microtrichia and sensory structures. These structures include two types of sensory pits and one of chaetic sensilla. Due to sexual dimorphism in palp size, females have a higher number of sensory pits. The sexual dimorphism of palps and the presence and role of sensilla in H. illucens was discussed in comparison to other species of the family Stratiomyidae and of other Diptera. This study may represent a base for further investigations on mouthpart structures of this species, involved in key physiological activities, such as feeding, mating and oviposition.

Revision of the family Carabodidae (Acari: Oribatida) XVII. Redescription of Diplobodes africanus Mahunka, 1987 from Kenia. Description of Diplobodes thailande sp. nov. from Thailand and Rwandabodes kayoveae gen. nov., sp. nov. from Rwanda

Zootaxa ◽  
2019 ◽  
Vol 4619 (3) ◽  
pp. 401-430 ◽  
Author(s):  
NESTOR FERNANDEZ ◽  
PIETER THERON ◽  
SERGIO LEIVA ◽  
ANINE JORDAAN
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Optical Microscopy ◽  
Detailed Analysis ◽  
Folding Process ◽  
Triangular Structure ◽  
The Family ◽  
Complex Relationships ◽  
Scanning Electron ◽  
Easy Differentiation

Diplobodes africanus Mahunka, 1987, is redescribed by using Scanning Electron Microscopy (SEM) in order to complement optical microscopy. Diplobodes thailande sp. nov. from Thailand is described. For both species we include inclined views, to permit detailed analysis of ventral regions and to aid understanding of the complex relationships between elevated and depressed zones. Diplobodes thailande sp. nov. presents previously undescribed structures on legs III, which are involved in the leg folding process. Rwandabodes kayoveae gen. nov., sp. nov. presents a series of particular characteristics, such as: elevated interlamellar process on prodorsum, composed of a triangular structure, externally delimited by a low lamellar furrow; in setae inserted on elevated interlamellar process; large free lamellar tip; notogaster lacking ridges; anterior genital furrow extends into an oblique lateral depression; depressed area anterior to anal zone; both zones clearly delimited. These characteristics permit easy differentiation from related genera. 

Scanning electron microscopy of basidiospores of species of Strobilomycetaceae

1971 ◽  
Vol 49 (8) ◽  
pp. 1259-1261 ◽  
Author(s):  
Larry F. Grand ◽  
Royall T. Moore
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
North American ◽  
North American Species ◽  
Surface Features ◽  
The Family ◽  
Similarities And Differences ◽  
Scanning Electron

Basidiospores of 13 North American species of Strobilomycetaceae were examined by scanning electron microscopy. Similarities and differences of surface features among species are discussed in relation to their possible role in the taxonomy of the family.

Structure of the cephalic end of two little-known oxyuroid genera, Travnema Pereira, 1938 and Cosmoxynemoides Travassos, 1949, parasites of fishes, as revealed by SEM

1994 ◽  
Vol 68 (4) ◽  
pp. 319-322 ◽  
Author(s):  
F. Moravec ◽  
A. Kohn ◽  
B.M.M. Fernandes
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Type Species ◽  
Freshwater Fishes ◽  
The Other ◽  
New Host ◽  
The Family ◽  
Cephalic Extremity ◽  
New Host Records ◽  
Scanning Electron

AbstractThe cephalic end of the type species of pharyngodonid genera Travnema and Cosmoxynemoides, T. travnema Pereira, 1938 and C. aguirrei Travassos, 1949, parasites of Brazilian freshwater fishes, was studied by scanning electron microscopy. The mouth aperture of Travnema was found to be circular, surrounded by four cephalic papillae and two lateral amphids and the cuticle of the cephalic end had a conspicuous dense sculpture. On the other hand, the mouth aperture of Cosmoxynemoides was triangular, surrounded by three lip-like elevations covering the whole surface of the relatively flat cephalic extremity, each with two inner lobes separated one from another by a short groove; the lip-like elevations bore four medium-sized, kidney-shaped cephalic papillae and two minute amphids (two papillae on the dorsal elevation and one papilla and one amphid on each of two ventrolateral elevations); the cuticle of the cephalic end was smooth. Both species were noted for the absence of oral lamellae and the presence of lateral alae. Both genera are listed in the family Pharyngodonidae but Travnema (and also Hakynema), due to its morphological peculiarities, is considered to represent a distinct subfamily Travnematinae within the Pharyngodonidae. The finding of both T. travnema and C. aguirrei in the characid fish Astyanax bimaculatus lacustris represents new host records.

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