Phylogenetic comparative morphological analysis of fern spores in subfamily Pteridoideae (Pteridaceae, Pteridophyta)

2021 ◽  
Author(s):  
Alexey V. Vaganov
Keyword(s):  
Morphological Analysis ◽  
Comparative Morphological Analysis

Ultrastructural analysis of the fat body in workers of Attini ants (Hymenoptera: Formicidae)

2009 ◽  
Vol 59 (2) ◽  
pp. 241-262 ◽  
Author(s):  
Gislaine Roma ◽  
Odair Bueno ◽  
Maria Camargo-Mathias
Keyword(s):  
Endoplasmic Reticulum ◽  
Morphometric Analysis ◽  
Morphological Analysis ◽  
Fat Body ◽  
Multivesicular Bodies ◽  
Cell Type ◽  
Atta Laevigata ◽  
Comparative Morphological Analysis ◽  
Intracellular Digestion ◽  
Polygonal Shape

AbstractIn the present study a comparative morphological analysis of the fat body cells of ant workers of the basal Attini species Cyphomyrmex rimosus and Mycetarotes parallelus, and the derived species Acromyrmex disciger and Atta laevigata was conducted. The results revealed that the fat body is located mainly in the abdomen around organs (perivisceral) and near the integument (parietal). The main cells observed are spherical or polygonal trophocytes with a slightly rough surface. The oenocytes, another cell type found, are closely associated with trophocytes, and present a spherical or polygonal shape and a smoother surface. The morphometric analysis showed that the area of trophocytes and oenocytes of C. rimosus and M. parallelus is significantly smaller when compared to those of A. disciger and A. laevigata. In the cytoplasm of parietal and perivisceral trophocytes and oenocytes, electronlucent droplets (probably lipids) and electrondense granules (probably proteins) indicate the participation of these cells in the storage of these elements, while digestive vacuoles, residual bodies, and multivesicular bodies suggest a role in intracellular digestion. In perivisceral trophocytes and oenocytes of C. rimosus, the presence of mitochondria, lamellar rough endoplasmic reticulum, and Golgi complex suggests that these cells synthesize proteins. Based on these data, no significant differences were observed between the fat body cells of basal and derived ants, except regarding the larger size of trophocytes and oenocytes of the derived species A. disciger and A. laevigata.

A new endemic species of Willowsia from Florida (USA) and descriptive notes on all New World Willowsia (Collembola: Entomobryidae)

Zootaxa ◽  
2017 ◽  
Vol 4350 (3) ◽  
pp. 549 ◽  
Author(s):  
ARON D. KATZ
Keyword(s):  
New Species ◽  
Endemic Species ◽  
Morphological Analysis ◽  
New World ◽  
Color Pattern ◽  
Scale Type ◽  
Unique Character ◽  
Comparative Morphological Analysis ◽  
World Distribution ◽  
Preliminary Support

Four species of Willowsia have been reported from the Americas (W. buski, W. jacobsoni, W. mexicana, and W. nigromaculata), and to date, W. mexicana is the only member of the genus endemic to the New World. Here, Willowsia pyrrhopygia sp. nov. from Florida is described. Like W. mexicana, this new species has a native New World distribution and uninterrupted rib scale type, but can be separated by color pattern and chaetotaxy. Dorsal head chaetotaxy and other descriptive notes are provided to compliment to descriptions for W. buski, W. jacobsoni, W. mexicana, and W. nigromaculata. Comparative morphological analysis also reveals two unique character states among Entomobryinae—the outer maxillary lobe with two (not three) sublobal hairs and the absence of labial triangle seta r—shared only by endemic New World Willowsia and Americabrya, providing preliminary support for their independent evolution from a common New World ancestor. 

Central European parasitic flatworms of the family Renicolidae Dollfus, 1939 (Trematoda: Plagiorchiida): molecular and comparative morphological analysis rejects the synonymization ofRenicola pinguiscomplex suggested by Odening

Parasitology ◽  
2016 ◽  
Vol 143 (12) ◽  
pp. 1592-1604 ◽  
Author(s):  
PETR HENEBERG ◽  
JILJÍ SITKO ◽  
JIŘÍ BIZOS ◽  
ELIZABETH C. HORNE
Keyword(s):  
Host Specificity ◽  
Morphological Analysis ◽  
28S Rdna ◽  
Niche Separation ◽  
Molecular Analyses ◽  
Central European ◽  
Similar Morphology ◽  
European Species ◽  
Comparative Morphological Analysis ◽  
The Family

SUMMARYThe Renicolidae are digenean parasites of piscivorous and molluscivorous birds. Although they exhibit few morphological autapomorphies and are highly variable, the numerous suggested re-classifications within the family have never been supported by any molecular analyses. We address the possible synonymization of species within theRenicola pinguiscomplex suggested previously by Odening. We provide and analyse sequences of two nuclear (ITS2, 28S rDNA) and two mitochondrial (CO1, ND1) DNA loci of central European species of the Renicolidae, namelyRenicola lari, Renicola pinguisandRenicola sternaesp. n., and we also provide first sequences ofRenicola sloanei. The combined molecular and comparative morphological analysis confirms the previously questioned validity of the threeRenicolaspp. of highly similar morphology, which display strict niche separation in terms of host specificity and selectivity. We identify two previously unreported clades within the genusRenicola; however, only one of them is supported by the analysis of adult worms. We also provide comparative measurements of the three examined closely related central European renicolids, and describe the newly proposed tern-specialized speciesRenicola sternaesp. n., which was previously repeatedly misidentified asRenicola paraquinta. Based on the extensive dataset collected in 1962–2015, we update the host spectrum of Renicolidae parasitizing central European birds (Renicola bretensis, R. lari, Renicola mediovitellata, R. pinguis, Renicola secundaandR. sternaesp. n.) and discuss their host-specific prevalence and intensity of infections.

scholarly journals THE COMPARATIVE MORPHOLOGICAL ANALYSIS OF THE NEPHROTOXICITY OF DOXORUBICIN AND NANOSTRUCTURED DOXORUBICIN IN CONDITIONS OF TRANSPLANTABLE CARCINOGENESIS

2018 ◽  
Vol 26 (2) ◽  
pp. 45-48
Author(s):  
I. N. Chairkin ◽  
N. V. Chairkina ◽  
O. N. Deryabina ◽  
V. Y. Medvezhonkov ◽  
O. V. Kalmin
Keyword(s):  
Morphological Analysis ◽  
Structural Changes ◽  
Morphological Changes ◽  
Control Group ◽  
Structural Components ◽  
Laboratory Rats ◽  
Chemotherapy Drugs ◽  
Morphological Evaluation ◽  
Comparative Morphological Analysis ◽  
Convoluted Tubules

The study was carried out on 120 mongrel white laboratory rats, to whom were transplanted the ascitiс Zaidel's hepatoma and which were divided into three equal groups. Of these, the first group of animals was a control group without treatment. In the second group, to animals doxorubicin was injected, in the third group, nanostructured doxorubicin was injected to the animals for 21 days. The aim of the study was to assess the degree of morphological changes in the tubules and glomeruli of the kidneys under the influence of nanostructured doxorubicin and doxorubicin in the condition of transplantable carcinogenesis. Given the nephrotoxicity of the chemotherapy drugs studied, the dynamics of structural changes in the tubules and glomeruli of the kidneys was studied. Conducted a comparative morphological evaluation of the changes occurring in the kidneys. The results of a morphological study of the structural components of the kidneys prove that doxorubicin and nanostructured doxorubicin have different effects on both the tubular apparatus and the glomeruli of the kidneys in the condition of transient carcinogenesis. The use of doxorubicin is accompanied by a relatively pronounced nephrotoxic effect, which is indicated by dystrophic and necrobiotic changes in the epithelium of convoluted tubules and the glomerular apparatus of the kidneys. The use of nanostructured doxorubicin is limited to moderately expressed dystrophic changes in the epithelium of the tubular apparatus of the kidneys, the glomerular apparatus remains intact at the same time. Thus, the use of the preparation of nanostructured doxorubicin for the treatment of the ascitic hepatoma of Zaidel in experimental animals has a less pronounced toxic and damaging effect on the renal parenchyma.

Sign in / Sign up

Export Citation Format

Share Document