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153 results for “Chironomus”
Figs. 5–9 in Description of Chironomus bifidus sp. n. and first record of Ch. crassiforceps (Kieffer, 1916) from India (Diptera: Chironomidae: Chironominae)
Figs. 5–9. Chironomus bifidus sp. n., pupa. 5 – frontal apotome; 6 – basal ring; 7 – tergites I–VII; 8 – tergite VIII with anal lobe and male genital sac; 9 – caudolateral comb.
Figs. 1–4 in Description of Chironomus bifidus sp. n. and first record of Ch. crassiforceps (Kieffer, 1916) from India (Diptera: Chironomidae: Chironominae)
Figs. 1–4. Chironomus bifidus sp. n., adult male. 1 – wing; 2 – fore tibial scale; 3 – hypopygium; 4 – superior volsella.
Рис. 2. Ментум Λичинок роΑа Chironomus из озера Кенон Fig. 2. Mentum of the Chironomus genus larvae from Lake Kenon in Toxic pollution assessment of Chita TPP-1 cooling reservoir by applying the method of head capsule morphological deformations in chironomid larvae
Рис. 2. Ментум Λичинок роΑа Chironomus из озера Кенон Fig. 2. Mentum of the Chironomus genus larvae from Lake Kenon
Fig. 3 in Ontogenetic variation in Chironomus flaviplumus (Diptera, Chironomidae) larvae
Fig. 3. Chironomus flaviplumus body at different instar larvae. A: whole body shape of first instar; B: whole body shape of second instar; C: whole body shape of fourth instar; D: lateral tubules of third instar; E: lateral tubules of fourth instar; F: anal tubules and anal setae of first instar. Scale bars: A, B, D, E, 100 μm; F, 50 μm; C, 1 mm.
Fig. 2 in Ontogenetic variation in Chironomus flaviplumus (Diptera, Chironomidae) larvae
Fig. 2. Mentum and ventomental plate shape from first to fourth instar larvae of Chironomus flaviplumus. A: first instar; B: second instar; C: third instar; D: fourth instar. All scale bars: 50 μm.
Fig. 4 in Ontogenetic variation in Chironomus flaviplumus (Diptera, Chironomidae) larvae
Fig. 4. Antenna shape of Chironomus flaviplumus first to fourth instar larvae. A: first instar; B: second instar; C: third instar; D: fourth instar. All scale bars: 50 μm.
Fig. 6 in Morpho-histological characterization of immature of the bioindicator midge Chironomus sancticaroli Strixino and Strixino (Diptera, Chironomidae)
Fig. 6. Micrographs of nervous system structures of immature of Chironomus sancticaroli. (A) Longitudinal section showing the brain cortical and neuropile; (B) longitudinal section of a ganglion in the nerve cord and a connective sheaf formed by axons; (C) longitudinal section showing the brain, thoracic ganglia and the first abdominal ventral nerve cord (numbers); (D) cross-section of the brain; (E) longitudinal section of the cephalic region of the larva, in detail is the frontal ganglion, anterior to the brain. 1st: first thoracic gangliom, 2nd: second thoracic gangliom; 3rd: third thoracic gangliom, I–III: thoracic segments; 4th: first abdominal gangliom; br: brain; cl: cortical layer, cn: connective; dv: diverticulum; fg: frontal gangliom; g: gangliom, ne: neuropile; nl: neural lamella, oe: esophagus; sg: salivary gland, tr: trophoblastes. Stain: Harris hematoxylin and eosin. Scale bar = 20 µm.
Fig. 3 in Morpho-histological characterization of immature of the bioindicator midge Chironomus sancticaroli Strixino and Strixino (Diptera, Chironomidae)
Fig. 3. Micrographs of the midgut of immature Chironomus sancticaroli. (A) Cross-section of the midgut region I; (B) longitudinal section of the midgut region I; (C) cells of the epithelium of the midgut region I, showing the little brush border area (arrow) and apical and basal eosinophilia of the cell (arrowhead); (D) cross-section of the midgut region II; (E) Cross-section of the region III of the midgut; (F) Brush border (arrow) and peritrophic matrix (arrowhead) in region II of the midgut and (G) Brush border (arrow) and cells in the process of secretion (arrowhead) in region III of midgut. cae: gastric caeca; ep: gut epithelia; fd: food; lu: lumen. Stain: Harris hematoxylin and eosin. Scale bar = 20 µm.
Fig. 4 in Morpho-histological characterization of immature of the bioindicator midge Chironomus sancticaroli Strixino and Strixino (Diptera, Chironomidae)
Fig. 4. Micrographs of hindgut immature of Chironomus sancticaroli. (A) cross-section between the transitional epithelium of the midgut and hindgut; (B) longitudinal section of the transition region between the mid and hindgut, showing the proctodeal valve (arrow); (C) in detail, epithelium of the proctodeal valve; (D) cross-section of ileum showing extensive muscle layer and the longitudinal folds formed by the epithelium (arrow); (E) longitudinal section of the colon and rectum; (F) cross-section of the epithelium of the colon and rectum demonstrating basal eosinophilia of the cell (arrowhead). p: epithelia; fd: food; lu: lumen; ml: muscle layer; mlp: Malpighian tubule, pm: perithrofic membrane; vep: valve epithelia. Stain: Harris hematoxylin and eosin. Scale bar = 20 µm.
Fig. 7 in Morpho-histological characterization of immature of the bioindicator midge Chironomus sancticaroli Strixino and Strixino (Diptera, Chironomidae)
Fig. 7. Micrographs of glands from the retrocerebral complex of the immature Chironomus sancticaroli. (A) Longitudinal section of the corpora allata, showing the glandular epithelium, demonstrating the cell nucleus (arrowhead); (B) longitudinal section of the prothoracic gland; (C) longitudinal section showing the region of the complex, demonstrating the anterior postcerebral gland and the small group of cells that make up the corpora cardiac; (D) detail of the anterior postcerebral gland, note the granules in their cytoplasm (arrowhead); (E) detail of the small group of cells that make up the corpora cardiaca (arrows). cc: corpora cardiaca; ga: anterior postcerebral gland; ptg: prothoracic gland, tr: trachea. Stain: Harris hematoxylin and eosin. Scale bar = 20 µm.
Fig. 4 in Factors that alter the biochemical biomarkers of environmental contamination in Chironomus sancticaroli (Diptera, Chironomidae)
Fig. 4. Effect of sample centrifugation on the activity of acetylcholinesterase (AChE), alpha esterase (EST-α), and beta alpha esterase (EST-β) of Chironomus sancticaroli. The values are expressed as the mean value of enzyme activity ± SD (n = 30 for each condition). Different letters indicate significant differences when p <0.05 (using paired t-test).
Fig. 2 in Factors that alter the biochemical biomarkers of environmental contamination in Chironomus sancticaroli (Diptera, Chironomidae)
Fig. 2. Effect of fasting for 24 h (A); 48 h (B) and 72 h (C) on the activity of acetylcholinesterase (AChE), alpha esterase (EST-α), and beta alpha esterase (EST-β) of Chironomus sancticaroli. The values are expressed as the mean value of enzyme activity ± SD (n = 30 for each condition). Different letters indicate significant differences when p <0.05 (using unpaired t-test).
Fig. 1 in Factors that alter the biochemical biomarkers of environmental contamination in Chironomus sancticaroli (Diptera, Chironomidae)
Fig. 1. Effect of temperature (20, 25 and 30 ◦C) on the activity of acetylcholinesterase (AChE), alpha esterase (EST-α), and beta alpha esterase (EST-β) of Chironomus sancticaroli. The values are expressed as the mean value of enzyme activity ± SD (n = 30 for each condition). Different letters indicate significant differences when p <0.05 (using ANOVA – one way and Tukey contrast).
Figure 3 in The effects of various lake typologies on the distribution of Chironomus spp. (Diptera), and arguments on optional factors of Water Framework Directive in Türkiye
Figure 3. CCA ordination of the sampled lakes (L1 to L20, except L2), significant environmental variables and species. Environmental variables ranging over (VIF> 10) were omitted from the ordination. A total of 56.62% variance was expressed in the first two axes. Groups (Grp I–IV) spotted by using K-means algorithm were mapped on the biplot. ORP: oxidation and reduction potential.
Figure 4 in The effects of various lake typologies on the distribution of Chironomus spp. (Diptera), and arguments on optional factors of Water Framework Directive in Türkiye
Figure 4. CCA ordination of the sampled lakes (L1 to L20, except L2) based on national altitude class boundaries (R1: <800 m, R2: 800–1600 m, R3:>1600 m). A total of 62.06% variance was expressed in the first two axes. The distinction of the three groups was found to be statistically significant (p <0.05). For the significance levels of the typological factors, see Table 1.
Figure 2 in The effects of various lake typologies on the distribution of Chironomus spp. (Diptera), and arguments on optional factors of Water Framework Directive in Türkiye
Figure 2. Pearson's correlation heatmap of the 20 environmental variables and 2 taxa metrics (H` and J). Color intensity and the size of the circle are proportional to the correlation coefficients: red spectrum indicates a negative correlation, and blue spectrum indicates a positive correlation.
Figure 6 in CLARIFICATION OF THE STATUS OF CHIRONOMUS JAVANUS KIEFFER, 1924 AND C. VITELLINUS FREEMAN, 1961 Abstract
Figure 6. Mentum with lowered central trifid tooth (left) and premandibles with 6 teeth (right) of Florida Chironomus vitellinus.
Figure 7 in CLARIFICATION OF THE STATUS OF CHIRONOMUS JAVANUS KIEFFER, 1924 AND C. VITELLINUS FREEMAN, 1961 Abstract
Figure 7. Mentum and ventromental plate (left) and premandible with 5 teeth (right) of Chironomus sp. "Florida".
Figure 3 in CLARIFICATION OF THE STATUS OF CHIRONOMUS JAVANUS KIEFFER, 1924 AND C. VITELLINUS FREEMAN, 1961 Abstract
Figure 3. Alignment of the COI barcode base pairs that differ between C. vitellinus (above) and C. javanus (below).
Figure 5 in CLARIFICATION OF THE STATUS OF CHIRONOMUS JAVANUS KIEFFER, 1924 AND C. VITELLINUS FREEMAN, 1961 Abstract
Figure 5. Male hypopygium (left) and anal point (right) of Florida specimen of Chironomus vitellinus.
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