scholarly journals Morphological diversity of foliar trichomes in Asteraceae from Sand-fields of the Pampa biome, Rio Grande do Sul State, Brazil

Hoehnea ◽  
2019 ◽  
Vol 46 (3) ◽  
Author(s):  
Vanessa Liesenfeld ◽  
Patrícia Gentz ◽  
Elisete Maria de Freitas ◽  
Shirley Martins
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Rio Grande ◽  
Morphological Diversity ◽  
Adaptive Strategy ◽  
Rio Grande Do Sul ◽  
Adverse Conditions ◽  
Pampa Biome ◽  
The Family ◽  
Scanning Electron

ABSTRACT Asteraceae is the largest family of angiosperms and occurs predominantly in grassland areas. This study aimed to identify and characterize the foliar trichomes of 34 Asteraceae species from Sand-fields of the Pampa biome, by means of epidermal analyzes (front and transverse view) under light and scanning electron microscopy. Eleven types of trichomes were identified and characterized: three glandular (recurved on the epidermis, erect-capitate and uniseriate to multiseriate vesicular-capitate) and eight non-glandular (simple conical, flagellate-filiform, aseptate-flagellate, whip-like, oblique-flagellate, branched with one arm, branched with two T-shaped arms, branched with three or more arms). The most representative glandular type was the uniseriate to multiseriate vesicular-capitate (58%) and the non-glandular type was the simple conical (35%). A large number of trichomes is an adaptive strategy to the adverse conditions of the Pampa biome and its morphological diversity can be useful in the family systematics.

scholarly journals Further notes on the morphology and distribution of Neopaxillus echinospermus (Agaricales, Basidiomycota) in Southern Brazil

Check List ◽  
2016 ◽  
Vol 12 (1) ◽  
pp. 1834 ◽  
Author(s):  
Alexandre Gonçalves dos Santos Silva-Filho ◽  
Gilberto Coelho ◽  
Vagner Gularte Cortez
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
South America ◽  
Rio Grande ◽  
Morphological Features ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Scanning Electron

Neopaxillus echinospermus is a common but poorly understood agaric species from South America (Argentina, Bolivia, Brazil and Paraguay). In this paper, we discuss conflicting morphological features reported in the literature and expand the distribution of the species to Seasonal Deciduous and Semideciduous Forests from Rio Grande do Sul and Paraná states, respectively, in Southern Brazil. Hyphal structure of the pileipellis, presence of cheilocystidia and caulocystidia, presence of clamp connections and oleiferous (thrombopleurous) hyphae, and the basidiospore morphology under scanning electron microscopy are illustrated and discussed in detail.

A new species of Myrceugenia (Myrteae, Myrtaceae) from Distrito Federal, Brazil, with notes on its micromorphology

Phytotaxa ◽  
2014 ◽  
Vol 183 (1) ◽  
pp. 37
Author(s):  
Kadja Milena Gomes-Bezerra ◽  
Jair Eustáquio Faria ◽  
Leslie Landrum ◽  
Lucia Helena Soares-Silva
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
New Species ◽  
Rio Grande ◽  
Gallery Forest ◽  
Rio Grande Do Sul ◽  
Santa Catarina ◽  
Distrito Federal ◽  
A New Species ◽  
Scanning Electron

During field collections for the doctoral thesis of the first author, a population of Myrceugenia was found in a gallery forest along Bananal stream in the Distrito Federal, Brazil. This population was recognized as a new species related to Myrceugenia glaucescens and M. acutata, separated by 800 km or more from previously known populations of those species in Rio de Janeiro, Paraná, Santa Catarina and Rio Grande do Sul states.  Specimens were studied using scanning electron microscopy (SEM) and the leaf architeture was studied in diaphanized leaves.

External morphology of the egg and the first and fifth instars of Cyrtocoris egeris Packauskas & Schaefer (Hemiptera: Heteroptera: Pentatomidae: Cyrto-corinae)

Zootaxa ◽  
2011 ◽  
Vol 2991 (1) ◽  
pp. 29 ◽  
Author(s):  
FILIPE MICHELS BIANCHI ◽  
VIVIANA CAUDURO MATESCO ◽  
LUIZ ALEXANDRE CAMPOS ◽  
JOCELIA GRAZIA
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Rio Grande ◽  
External Morphology ◽  
Rio Grande Do Sul ◽  
Nymphal Stage ◽  
Efferent System ◽  
First Instar ◽  
Heteroptera Pentatomidae ◽  
Scanning Electron

Cyrtocorinae is an uncommon, small, and exclusively Neotropical group in Pentatomidae, whose immatures are poorly understood. In this paper, the egg and first and fifth instars of Cyrtocoris egeris Packauskas & Schaefer are studied with the scanning electron microscopy (SEM). Specimens were collected in Maquiné, Rio Grande do Sul, Brazil. Immatures were analyzed with light stereomicroscope and SEM. The egg’s chorion surface is predominantly smooth alternated with granulated areas, and an average of 54 clubbed aero-micropylar processes are arranged in three irregular rows. In the first and fifth instars, organization of the external dorso-abdominal scent efferent system suggests an analogy to the metathoracic external scent efferent system of the adult, because of structures similar to the evaporatorium, evaporatory channel, and auricle peritreme; the last structure is absent in the first instar. Abdominal sterna III–VII have 1+1 (first instar) and 2+2 trichobothria (fifth instar). Ultrastructural observations allowed recognition of unique characters at the egg stage and conserved features at the nymphal stage in C. egeris.

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.

Egg ultrastructure of two species of Galgupha Amyot & Serville, with a discussion of the eggs and oviposition patterns of thyreocorid and allied groups (Hemiptera: Heteroptera: Pentatomoidea: Thyreocoridae)

Zootaxa ◽  
2012 ◽  
Vol 3247 (1) ◽  
pp. 43 ◽  
Author(s):  
VIVIANA CAUDURO MATESCO ◽  
FILIPE MICHELS BIANCHI ◽  
LUIZ ALEXANDRE CAMPOS ◽  
JOCELIA GRAZIA
Keyword(s):  
Electron Microscopy ◽  
Maternal Care ◽  
Oviposition Behavior ◽  
Rio Grande ◽  
Immature Stages ◽  
Rio Grande Do Sul ◽  
Egg Morphology ◽  
Cladistic Analyses ◽  
Phylogenetic Framework ◽  
Scanning Electron

Immature stages are known in only 11 species of the Thyreocoridae. In this paper, the eggs of Galgupha (Euryscytus)difficilis (Breddin) and Galgupha (Gyrocnemis) fossata McAtee & Malloch are described and illustrated. Egg morphologyand oviposition habit in the Thyreocoridae and Cydnidae are reviewed. Adults of both species were collected in SãoFrancisco de Paula municipality, state of Rio Grande do Sul, Brazil, and maintained in the laboratory for oviposition. Theeggs were examined by stereomicroscopy and scanning electron microscopy and photographed. In G. (E.) difficilis, theeggs were laid singly or in pairs; each egg is cylindrical (0.8 x 0.5 mm) and white and the chorion is shiny, translucent,and smooth; the micropylar processes (2–4) are short and stalked. In G. (G.) fossata, the eggs were laid singly; each eggis cylindrical (0.9 x 0.6 mm) and white and the chorion is shiny, translucent, and granulated; the micropylar processes (4–10) are short, stalked, and transversely constricted. The eggs of both species are similar to those of other thyreocorids,especially of other corimelaenines. The Thyreocoridae in the broadest sense (including the Parastrachiinae) is not auniform group concerning egg morphology, oviposition behavior, and maternal care. Within the Pentatomoidea, based onegg morphology, the Cydnidae is the group nearest to the Thyreocoridae. The evolution of the eggs in the Pentatomoidea should be investigated within a phylogenetic framework, including egg characters, in future cladistic analyses.

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.

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