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228 results for “Potamotrygon”
FIGURE 26 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 26. Morphological details of Potamotrygon amazona, sp. nov. (MZUSP 117344, adult male, 532 mm DW). A. Dorsal head and snout region. B. Mouth and nostrils. C. Dorsal view of tail origin, pelvic fins, and dorsal spine rows. D. Ventral view of pelvic fins, claspers and cloaca. E. Dorsal clasper.
FIGURE 32 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 32. Illustration of the clasper skeleton of Potamotrygon amazona, sp. nov. (MZUSP 117347, adult male, 560 mm DW). A. Dorsal view. B. Ventral view. Abbreviations: AT, acessory terminal; AX, axial cartilage; BE, beta cartilage; B1, first basal segment; B2, second basal segment; DM, dorsal marginal; DT2, dorsal terminal 2; VM, ventral marginal; VT, ventral terminal.
FIGURE 23 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 23. Illustration of the clasper skeleton of Potamotrygon adamastor, sp. nov. A. Dorsal view. B. Ventral view. Abbreviations: AT, acessory terminal; AX, axial cartilage; BE, beta cartilage; B1, first basal segment; B2, second basal segment; DM, dorsal marginal; DT2, dorsal terminal 2; VM, ventral marginal; VT, ventral terminal.
FIGURE 22 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 22. Skeletal anatomy (from radiographs) of Potamotrygon adamastor, sp. nov. (MZUSP 104662, adult female, 545 mm DW). A. Ventral view of anterocentral disc. B. Ventral skull and jaws. C. Angular cartilages, right side. D. Ventral pectoral girdle. E. Ventral pelvic girdle and fins. Abbreviations: AAC, anterior angular cartilage; BCO, coracoid bar; BP, basipterigium; HYO, hyomandibula; LAC, lateral angular cartilage; MC, Meckel's cartilage; MES, mesopterygium; MET, metapterygium; MSC, mesocondyle; MTC, metacondyle; PAC, posterior angular cartilage; PIB, puboischiadic bar; PQ, palatoquadrate; PRC, procondyle; PRO, propterygium.
FIGURE 40 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 40. Skeletal anatomy (from radiographs) of Potamotrygon garmani, sp. nov. (UNT 2178, adult female, 428 mm DW). A. Ventral view of the anterior disc, jaws and pectoral girdle. Scale bar = 15 mm. B. Pelvic girdle, pelvic radials, and base of tail. Scale bar = 10 mm. C. Angular cartilages, right side. Scale bar = 5 mm. Abbreviations: AAC, anterior angular cartilage; BCO, coracoid bar; BP, basipterigium; HYO, hyomandibula; LAC, lateral angular cartilage; MC, Meckel's cartilage; MES, mesopterygium; MET, metapterygium; MSC, mesocondyle; MTC, metacondyle; PAC, posterior angular cartilage; PIB, puboischiadic bar; PQ, palatoquadrate; PRC, procondyle; PRO, propterygium.
FIGURE 37 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 37. Color variation in Potamotrygon garmani, sp. nov. A. UNT 2173 (subadult male, 405 mm DW) B. UNT 2185 (juvenile male, 273 mm DW).
FIGURE 20 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 20. Scanning Electron Microscope (SEM) images of the dermal denticles of Potamotrygon adamastor, sp. nov. (MZUSP 104664). A. Rostral region. B. Rostral region in detail. C. Dorsal head region. D. Dorsal head region in detail. E. Dorsal caudal region. F. Dorsal caudal region in detail. Abbreviations: Bp, basal plate; Br, basal ridge; Cr, coronal ridge; Co, corona; Cd, coronal dichotomy; Cp, coronal plate.
FIGURE 21 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 21. Ventral lateral-line canals of Potamotrygon adamastor, sp. nov. (based on MZUSP 104664). A. Overall arrangement. B. Anterior portion in detail. Abbreviations: ACH, angular component of hyomandibular canal; AJL, anterior jugular loop; AST, anterior subpleural tubules; CON, orbitonasal component of supraorbital canal; HYC, hyomandibular canal; IOC, infraorbital canal; IOL, infraorbital loop; JCH, jugular component of hyomandibular canal; JUG, jugular canal; NAS, nasal canal; NIL, nasointerior loop; PJL, posterior jugular loop; PNC, prenasal component of nasal canal; PNL, prenasal loop; PST, posterior subpleural tubules; SOC, supraorbital canal; SOL, suborbital loop; SOI, suborbital component of infraorbital canal; SPC, subpleural component of hyomandibular canal; SPL, subpleural loop; SRC, subrostral component of supraorbital canal.
FIGURE 19 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 19. Color variation in Potamotrygon adamastor, sp. nov. A. MZUSP 104662 (adult female, 545 mm DW). B. MZUSP 104664 (adult male, 450 mm DW).
FIGURE 18 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 18. Teeth of Potamotrygon adamastor, sp. nov (MZUSP 104664, adult male, 450 mm DW). A. Upper jaw. B. Lower jaw. Scale bar = 2 mm.
FIGURE 36 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 36. Teeth of Potamotrygon garmani, sp. nov. (UNT 2173) A. Upper jaw (scale bar = 2 mm). B. Upper jaw (scale bar = 5 mm). C. Lower jaw (scale bar = 5 mm). D. Lower jaw (scale bar = 2 mm).
FIGURE 16 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 16. Paratype of Potamotrygon adamastor, sp. nov. (MZUSP 104664, adult male, 450 mm DW rio Urariquera, rio Branco basin, municipal district of Boa Vista, upper Amazon basin, state of Roraima, Brazil). A. Dorsal view. B. Ventral view.
FIGURE 39 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 39. Ventral lateral-line canals of Potamotrygon garmani, sp. nov. (based on UNT 2173) A. Overall arrangement. B. Anterior portion in detail. Abbreviations: ACH, angular component of hyomandibular canal; AJL, anterior jugular loop; AST, anterior subpleural tubules; CON, orbitonasal component of supraorbital canal; HYC, hyomandibular canal; IOC, infraorbital canal; IOL, infraorbital loop; JCH, jugular component of hyomandibular canal; JUG, jugular canal; NAS, nasal canal; NIL, nasointerior loop; PJL, posterior jugular loop; PNC, prenasal component of nasal canal; PNL, prenasal loop; PST, posterior subpleural tubules; SOC, supraorbital canal; SOL, suborbital loop; SOI, suborbital component of infraorbital canal; SPC, subpleural component of hyomandibular canal; SPL, subpleural loop; SRC, subrostral component of supraorbital canal.
FIGURE 17 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 17. Morphological details of Potamotrygon adamastor, sp. nov. (MZUSP 104662, adult female, 545 mm DW). A. Dorsal head and snout region. B. Mouth and nostrils. C. Dorsal view of tail origin, pelvic fins, and dorsal thorn rows. D. Ventral view of pelvic fins and cloaca. E. Dorsal view of clasper (MZUSP 104664, adult male, 450 mm DW).
FIGURE 34 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 34. Paratype of Potamotrygon garmani, sp. nov. (UNT 2178, adult female, 428 mm DW, rio Paranã, rio Tocantins basin, state of Tocantins, Brazil). A. Dorsal view. B. Ventral view.
FIGURE 30 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 30. Ventral lateral-line canals of Potamotrygon amazona, sp. nov. (based on MZUSP 117345) A. Overall arrangement; B. Anterior portion in detail. Abbreviations: ACH, angular component of hyomandibular canal; AJL, anterior jugular loop; AST, anterior subpleural tubules; CON, orbitonasal component of supraorbital canal; HYC, hyomandibular canal; IOC, infraorbital canal; IOL, infraorbital loop; JCH, jugular component of hyomandibular canal; JUG, jugular canal; NAS, nasal canal; NIL, nasointerior loop; PJL, posterior jugular loop; PNC, prenasal component of nasal canal; PNL, prenasal loop; PST, posterior subpleural tubules; SOC, supraorbital canal; SOL, suborbital loop; SOI, suborbital component of infraorbital canal; SPC, subpleural component of hyomandibular canal; SPL, subpleural loop; SRC, subrostral component of supraorbital canal.
FIGURE 42 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 42. Angular cartilages of species of the P. scobina complex. A. Holotype of Potamotrygon scobina (MCZ-602s, juvenile male, 238 mm DW). B. Potamotrygon scobina (MZUSP 104247, adult male, 503 mm DW). C. Potamotrygon adamastor, sp. nov. (MZUSP 104662, adult female, 545 mm DW). D. Potamotrygon limai (MZUSP 104068, juvenile male, 219 mm DW). E. Potamotrygon amazona, sp. nov. (MZUSP 117344, adult male, 532 mm DW). F. Potamotrygon garmani, sp. nov. (UNT 2174, adult? male, 341 mm DW). Abbreviations: AAC, anterior angular cartilage; LAC, lateral angular cartilage; PAC, posterior angular cartilage.
FIGURE 15 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 15. Holotype of Potamotrygon adamastor, sp. nov. (MZUSP 104662, adult female, 545 mm DW, rio Urariquera, rio Branco basin, municipal district of Boa Vista, upper Amazon Basin, state of Roraima, Brazil, 3°22'51.9594l N, 60°35'44.1594l W). A. Dorsal view. B. Ventral view.
FIGURE 13 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 13. Skeletal anatomy (from radiographs) of Potamotrygon scobina (MZUSP 104247, adult male, 503 mm DW). A. Ventral view of anterior disc. B. Ventral skull and jaws. C. Pectoral girdle. D. Angular cartilages, right side. E. Pelvic girdle. F. Pelvic fins and clasper skeleton. Abbreviations: AAC, anterior angular cartilage; AX, axial cartilage; BCO, coracoid bar; B1, first basal segment; B2, second basal segment; BP, basipterigium; HYO, hyomandibula; LAC, lateral angular cartilage; MC, Meckel's cartilage; MES, mesopterygium; MET, metapterygium; MSC, mesocondyle; MTC, metacondyle; PAC, posterior angular cartilage; PIB, puboischiadic bar; PQ, palatoquadrate; PRC, procondyle; PRO, propterygium.
FIGURE 14 in Systematic revision of the Potamotrygon scobina Garman, 1913 species-complex (Chondrichthyes: Myliobatiformes: Potamotrygonidae), with the description of three new freshwater stingray species from Brazil and comments on their distribution and biogeography
FIGURE 14. Illustration of the clasper skeleton of Potamotrygon scobina (based on MZUSP 104245). A. Dorsal view. B. Ventral view. Abbreviations: AT, acessory terminal; AX, axial cartilage; BE, beta cartilage; B1, first basal segment; B2, second basal segment; DM, dorsal marginal; DT2, dorsal terminal 2; VM, ventral marginal; VT, ventral terminal.
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