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228 results for “Potamotrygon”
Figure 1 in Hematology and blood biochemistry profile of the freshwater stingray Potamotrygon magdalenae as a tool for population assessment in artificial environments
Figure 1. Different cell types found in peripheral blood of captive adults of Potamotrygon magdalenae.
Figure 2 in Hematology and blood biochemistry profile of the freshwater stingray Potamotrygon magdalenae as a tool for population assessment in artificial environments
Figure 2. Correlation's matrix test among body condition and physiological parameters in captive adults of Potamotrygon magdalenae. RBC:Erythrocyte count; Hb: Hemoglobin; Ht: Hematocrit; Leu: Leukocte count; Thr: Thrombocyte count; He%: Heterophils proportion; Eos%: Eosinophils proportion; Ly%: Lymphocytes proportion; Mo%: Monocytes proportion; Ure: Urea; Tri: Triglycerides; Pp: Plasma proteins; Sp: Serum proteins; Glu: Glucose; Col: Cholesterol. Ellipses show the type of correlation between each variable, slope shows whether the correlation is positive or negative, color intensity shows the correlation's strength, and amplitude of the ellipse corresponds to the data dispersion. The upper diagonal shows the p values for each correlation.
Figure 5 in Study of the integument that covering back and stinger of the freshwater stingray Potamotrygon rex (Chondricthyes, Potamotrygonidae)
Figure 5. Histochemistry of the Potamotrygon rex stingray: back (A: B: C: D; E) and stinger (F; G; H, I). (A) Micrograph showing mucous cells positive by the PAS histochemical method. (B) Image magnification showing that epithelial cells also presented positive cytoplasm to PAS, as well as the basal membrane (Bm). (C) Alcian Blue positive epithelial cells. (D) Epithelial cells positive to Bromophenol Blue, detail (Pr) Protein reserve strongly positive for Bromophenol Blue. (E) granulosa cells positive to Bromophenol Blue. (F, G, H, I) Stinger regions with all Bromophenol Blue positive cells. Ct- connective tissue; Bm- basal membrane; Mc – mucous cell; Pr- protein reserve (arrows); Mr- mineralized region; Gc – granulosa cell; Cm- chromatophores; DLR - dorsolateral region; VLR- ventrolateral region.
Figure 1 in Study of the integument that covering back and stinger of the freshwater stingray Potamotrygon rex (Chondricthyes, Potamotrygonidae)
Figure 1. Collection sites for the tissues of the back and stinger of the Potamotrygon rex stingray, numbered according to their position. (A) Back of the stingray: 1- median tail; 2- base of the tail; 3- cephalic region; 4- left lateral fin; 5- right lateral fin. (B) Stinger: 1- apex; 2-middle and 3- base. (C) Scheme showing transversal section of the stinger regions that were analyzed under light microscopy. DR- Dorsal Region, DLR- Dorsolateral Region, VLR- Ventrolateral Region.
Figure 3 in Study of the integument that covering back and stinger of the freshwater stingray Potamotrygon rex (Chondricthyes, Potamotrygonidae)
Figure 3. Photomicrograph of the back and stinger of the Potamotrygon rex's epidermis. (A) General view of the back. (C) Detail of the epithelial tissue of the back showing the layers: Sup- superficial; Int- intermediary; Bas- basal. (E) Detail of the basal layer showing the granulosa cell (arrow). (B. D and F) Different regions of the stinger and the different layers of the epithelium: Sup- superficial, Intintermediate, Bas- basal. (G) Cross section of the stinger showing the superficial (Sup) and intermediate (Int) layers, where it is possible to notice the epithelial cells of the intermediate layer. Et- epithelial tissue, Ct- connective tissue; Dd- dermal denticle; Mc- mucous cell; Gc – granulosa cell; Pr- protein reserve; Cm- chromatophores; DLR - dorsolateral region; VLR- ventrolateral region; Mr- mineralized region. (A-F) H&E stain. (G) PAS stain.
Figure 2 in Study of the integument that covering back and stinger of the freshwater stingray Potamotrygon rex (Chondricthyes, Potamotrygonidae)
Figure 2. Adult female specimen of the stingray Potamotrygon rex. (A) Dorsal view of the stingray. (B) Tail of the stingray with two stingers attached to the middle portion of the tail, in the dorsal region, where the outermost stinger (*) is larger than the innermost one.
Fig. 52. Potamotrygon amandae, n in Systematic revision of the Potamotrygon motoro (Müller & Henle, 1841) species complex in the Paraná-Paraguay basin, with description of two new ocellated species (Chondrichthyes: Myliobatiformes: Potamotrygonidae)
Fig. 52. Potamotrygon amandae, n. sp. Anatomical details from radiograph of holotype, MZUSP 110910. Abbreviations: AAC, anterior angular cartilage; PAC, posterior angular cartilage.
Fig. 51. Potamotrygon amandae, n in Systematic revision of the Potamotrygon motoro (Müller & Henle, 1841) species complex in the Paraná-Paraguay basin, with description of two new ocellated species (Chondrichthyes: Myliobatiformes: Potamotrygonidae)
Fig. 51. Potamotrygon amandae, n. sp. Dorsal and ventral views of neurocranium and mandibular arch (in ventral view) of a non-type adult male specimen, MZUSP 111148, 280 mm DW. Abbreviations: AAC, anterior angular cartilage; CL, calcified ligament; DLP, dorsolateral process; EPB, epiphysial bar; FPF, frontoparietal fontanelle; HYO, hyomandibula; MC, Meckel's cartilage; PAC, posterior angular cartilage; PCF, precerebral fontanelle; POP, postorbital process; PQ, palatoquadrate PRP, preorbital process; SP, supraorbital process.
Fig. 49. Potamotrygon amandae, n in Systematic revision of the Potamotrygon motoro (Müller & Henle, 1841) species complex in the Paraná-Paraguay basin, with description of two new ocellated species (Chondrichthyes: Myliobatiformes: Potamotrygonidae)
Fig. 49. Potamotrygon amandae, n. sp. MZUSP 111148: (a) Dorsal view of tail showing the entire dorsal rows of enlarged pointed spines, (b) showing the rows and format of pointed spines, and (c) detail of some pointed spines of dorsal rows.
Fig. 47 in Systematic revision of the Potamotrygon motoro (Müller & Henle, 1841) species complex in the Paraná-Paraguay basin, with description of two new ocellated species (Chondrichthyes: Myliobatiformes: Potamotrygonidae)
Fig. 47. Patterns of ocelli and spots in specimens of P. amandae, n. sp.: (a) holotype MZUSP 110910, (b) MZUSP 110904 and (c) MZUSP 110906.
Fig. 46. Potamotrygon amandae, n in Systematic revision of the Potamotrygon motoro (Müller & Henle, 1841) species complex in the Paraná-Paraguay basin, with description of two new ocellated species (Chondrichthyes: Myliobatiformes: Potamotrygonidae)
Fig. 46. Potamotrygon amandae, n. sp. Dorsal view of right clasper of an adult male, MZUSP 111148, adult male, 280 mm DW. Abbreviations: ap, apopyle; cg, clasper groove; dp, dorsal pseudosiphon; hp, hypopyle; vp, ventral pseudosiphon.
Fig. 50. Potamotrygon amandae, n in Systematic revision of the Potamotrygon motoro (Müller & Henle, 1841) species complex in the Paraná-Paraguay basin, with description of two new ocellated species (Chondrichthyes: Myliobatiformes: Potamotrygonidae)
Fig. 50. Potamotrygon amandae, n. sp. Ventral canals of lateral line system in a non-type adult female specimen, MZUSP 111140, 254 mm DW. Abbreviations: hyc, hyomandibular canal; ioc, infraorbital canal; mnc, mandibular canal; nas, nasal canal; suc, supraorbital canal; ach, angular component of hyomandibular canal; iol, infraorbital loop; jch, jugular component of hyomandibular canal; nil, nasointernal loop; onc, orbitonasal component of supraorbital canal; pnc, prenasal component of nasal canal; pnl, prenasal loop; pst, posterior subpleural tubule; sbr, subrostral component of supraorbital canal; sol, suborbital loop; spc, subpleural component of hyomandibular canal; spl, subpleural loop; spt, subpleural tubules; sub, suborbital component of infraorbital canal.
Fig. 45. Potamotrygon amandae, n in Systematic revision of the Potamotrygon motoro (Müller & Henle, 1841) species complex in the Paraná-Paraguay basin, with description of two new ocellated species (Chondrichthyes: Myliobatiformes: Potamotrygonidae)
Fig. 45. Potamotrygon amandae, n. sp. Upper and lower jaws of a non-type adult female specimen, MZUSP 110916, 275 mm DW.
Fig. 41. Potamotrygon amandae, n in Systematic revision of the Potamotrygon motoro (Müller & Henle, 1841) species complex in the Paraná-Paraguay basin, with description of two new ocellated species (Chondrichthyes: Myliobatiformes: Potamotrygonidae)
Fig. 41. Potamotrygon amandae, n. sp. Dorsal (a) and ventral (b) views of paratype, MZUSP 110907, adult female, 270 mm DW, from Paraguay River.
Fig. 48. Potamotrygon amandae, n in Systematic revision of the Potamotrygon motoro (Müller & Henle, 1841) species complex in the Paraná-Paraguay basin, with description of two new ocellated species (Chondrichthyes: Myliobatiformes: Potamotrygonidae)
Fig. 48. Potamotrygon amandae, n. sp. Detail of dermal denticles present in a non-type juvenile male specimen, MZUSP 111150, 215 mm DW, showing the two morphological types of denticles, with star-shaped and pointed crowns.
Fig. 40. Potamotrygon amandae, n in Systematic revision of the Potamotrygon motoro (Müller & Henle, 1841) species complex in the Paraná-Paraguay basin, with description of two new ocellated species (Chondrichthyes: Myliobatiformes: Potamotrygonidae)
Fig. 40. Potamotrygon amandae, n. sp. Dorsal (a) and ventral (b) views of paratype, MZUSP 110906, adult female, 294 mm DW, from Paraguay River.
Fig. 39. Potamotrygon amandae, n in Systematic revision of the Potamotrygon motoro (Müller & Henle, 1841) species complex in the Paraná-Paraguay basin, with description of two new ocellated species (Chondrichthyes: Myliobatiformes: Potamotrygonidae)
Fig. 39. Potamotrygon amandae, n. sp. Dorsal (a) and ventral (b) views of paratype, MZUSP 110904, adult male, 312 mm DW, from Paraná River.
Fig. 38. Potamotrygon amandae, n in Systematic revision of the Potamotrygon motoro (Müller & Henle, 1841) species complex in the Paraná-Paraguay basin, with description of two new ocellated species (Chondrichthyes: Myliobatiformes: Potamotrygonidae)
Fig. 38. Potamotrygon amandae, n. sp. Dorsal (a) and ventral (b) views of holotype, MZUSP 110910, adult female, 341 mm DW, Paraguay River.
Fig. 36. Potamotrygon pantanensis, n in Systematic revision of the Potamotrygon motoro (Müller & Henle, 1841) species complex in the Paraná-Paraguay basin, with description of two new ocellated species (Chondrichthyes: Myliobatiformes: Potamotrygonidae)
Fig. 36. Potamotrygon pantanensis, n. sp. Anatomical details from radiograph of holotype, MZUSP 110890. Abbreviations: AAC, anterior angular cartilage; PAC, posterior angular cartilage.
Fig. 37 in Systematic revision of the Potamotrygon motoro (Müller & Henle, 1841) species complex in the Paraná-Paraguay basin, with description of two new ocellated species (Chondrichthyes: Myliobatiformes: Potamotrygonidae)
Fig. 37. Distribution of Potamotrygon pantanensis, n. sp. in the Paraná-Paraguay system. Blue circles show localities where specimens of P. pantanensis were obtained for this study. Blue star indicates Cuiabá River, type locality of P. pantanesis.
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