Microspines in the pylorus of Pseudonannolene tricolor and Rhinocricus padbergi (Arthropoda, Diplopoda)

Miyoshi, Akio Ronaldo; Gabriel, Vagner A.; Fantazzini, Evandro R.; Fontanetti, Carmem Silvia

doi:10.1590/s0073-47212005000200008

Cited by 6 publications

(4 citation statements)

References 9 publications

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“…This species was chosen as test organism since it is abundant and is easy to collect in the region where the study was developed. Moreover, this study gives continuity to the main researches about this species, conducted by Camargo-Mathias et al (1998;, Fantazzini et al (1998;, Camargo-Mathias and Fontanetti (2000), Arab et al (2003), Fontanetti and CamargoMathias (2004), Miyoshi et al (2005), .…”

Section: Introductionsupporting

confidence: 76%

Assessment of the Toxic Potential of Sewage Sludge in the Midgut of the Diplopod Rhinocricus padbergi

Perez

Fontanetti

2010

Water Air Soil Pollut

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The destination of sewage sludge is a problem faced by sewage treatment plants (STPs). Many alternatives have been sought, such as the application of sewage sludge in degraded soils and in agriculture as fertilizer. However, due to the risk of contamination with pathogens and/or metals, the use of sludge should be done cautiously. By the habits that diplopods present, they have been considered good environmental indicators for soil analysis. In this study, animals from the Rhinocricus padbergi species were exposed to two sewage sludge samples from two STPs in the São Paulo State, for different periods. The midgut of the animals were removed and histologically processed and subjected to histochemical tests. It was detected the following tissular responses: clusters of haemocytes through the cells of the fat body layer, increase in the quantity of intracellular granules in the cells of the fat body layer, increase in the release of secretion vesicles of the intestinal epithelium, and intense vacuolization of the cytoplasm of epithelial cells. The results suggest the presence of toxic substances to the studied species in both sludge samples used.

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Section: Introductionsupporting

confidence: 76%

Assessment of the Toxic Potential of Sewage Sludge in the Midgut of the Diplopod Rhinocricus padbergi

Perez

Fontanetti

2010

Water Air Soil Pollut

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“…The presence of microspines in the hindgut is widely observed among arthropod groups (Tables 1-3). The morphology of microspines in M. brachydactyla varies spatially, as occurs in other adult malacostracans (Chisaka et al 1999;Moon and Kim 1999), insects (Byers and Bond 1971;Elzinga and Hopkins 1995) and millipedes (Miyoshi et al 2005). The role of microspines is unknown; however, it has been proposed that they: 1) attach the peritrophic membrane, thus promoting the backward movement of faeces (Hopkin and Nott 1980;Felder and Felgenhauer 1993) and preventing their forward movement under conditions of anal water intake (Felder and Felgenhauer 1993); 2) shred the peritrophic membrane, thereby facilitating water and ion absorption (Byers and Bond 1971); and 3) serve as binding sites for microbial communities (Harris 1993a;Cazemier et al 1997;Elzinga 1998;Nardi et al 2016).…”

Section: Discussionmentioning

confidence: 99%

Description of the larval and adult hindgut tract of the common spider crab Maja brachydactyla Balss, 1922 (Brachyura, Decapoda, Malacostraca)

et al. 2021

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Arthropods are the most diversified animals on Earth. The morphology of the digestive system has been widely studied in insects; however, crustaceans have received comparatively little attention. This study describes the hindgut tract of the common spider crab Maja brachydactyla Balss, 1922 in larvae and adults using dissection, light and electron microscopical analyses. The hindgut tract maintains a similar general shape in larvae and adults. Major differences among stages are found in the morphology of epithelial cells and microspines, the thickness of the cuticle and connective-like tissue, and the presence of rosette glands (only in adults). Here we provide the description of the sub-cellular structure of the folds, epithelium (conformed by tendon cells), musculature, and microspines of the hindgut of larvae and adults of M. brachydactyla.The morphological features of the hindgut of M. brachydactyla is compared with those of other arthropods (Insecta, Myriapoda and Arachnida). Our results suggest that the morphology of the hindgut is associated mainly with transport of faeces. In adults, the hindgut may also exert an osmoregulatory function, as described in other arthropods. At difference from holometabolous insets, the hindgut of M. brachydactyla (Decapoda) does not undergo a true metamorphic change during development, but major changes observed between larval and adult stages might respond to the different body size between life stages.

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“…In association with adipocytes, smaller cells, named oenocytes, are observed. The parietal fat body is located dorsally in the animal, and the perivisceral fat body fills the body cavity, forming an irregular and anastomotic mass~Fontanetti et al., 2004!. This species was chosen as it is abundant in the region where this study took place and other aspects of its biology have already been studied~Fantazzini et , 2002Arab et al, 2003;Fontanetti et al, , 2006Calligaris et al, 2005;Miyoshi et al, 2005!. in February 2009. In the laboratory they were submitted to a 20-day acclimatization period at 218C.…”

Section: Introductionmentioning

confidence: 99%

“…This species was chosen as it is abundant in the region where this study took place and other aspects of its biology have already been studied (Fantazzini et al, 1998, 2002; Arab et al, 2003; Fontanetti & Camargo-Mathias, 2004; Fontanetti et al, 2004, 2006; Calligaris et al, 2005; Miyoshi et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Alterations in the Fat Body Cells ofRhinocricus padbergi(Diplopoda) Resulting from Exposure to Substrate Containing Sewage Sludge

Souza

Fontanetti

2012

Microsc Microanal

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Abstract:The final disposal of residues generated at sewage treatment plants~STPs! has become a major problem for cities, due to the increase in the amount of treated sewage. One of the alternatives for the residue, labeled "sewage sludge," is its reuse in agriculture and in degraded soil. However, not all pathogens and metals present in it are eliminated during treatment. Diplopods have been used as bioindicators in ecotoxicological tests as they are constantly in close contact with the soil. Owing to this fact, the purpose of this study was to expose specimens of the diplopod Rhinocricus padbergi to substrate containing sewage sludge collected at STPs to analyze morphological alterations in their parietal and perivisceral fat body, where substances are stored. The exposures were held for 7, 15, or 90 days at different concentrations of sewage sludge~control, 1%, 10%, and 50%!. The parietal fat body showed no alterations in any of the three exposure periods or concentrations. Alterations in the perivisceral fat body were observed for all exposure periods. According to the results, we suggest that the sludge used has toxic agents responsible for changing the animal's perivisceral fat body.

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Microspines in the pylorus of Pseudonannolene tricolor and Rhinocricus padbergi (Arthropoda, Diplopoda)

Cited by 6 publications

References 9 publications

Assessment of the Toxic Potential of Sewage Sludge in the Midgut of the Diplopod Rhinocricus padbergi

Assessment of the Toxic Potential of Sewage Sludge in the Midgut of the Diplopod Rhinocricus padbergi

Description of the larval and adult hindgut tract of the common spider crab Maja brachydactyla Balss, 1922 (Brachyura, Decapoda, Malacostraca)

Alterations in the Fat Body Cells ofRhinocricus padbergi(Diplopoda) Resulting from Exposure to Substrate Containing Sewage Sludge

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