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228 results for “Potamotrygon”
FIGURE 8 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)
FIGURE 8: Dermal denticles of Potamotrygon tatianae sp. nov., in dorsal view, from mid region of back. A) Denticle arrangement. B) Individual dermal denticle amplified. Abbreviations: cd, crown dichotomy; cp, crown plate; cr, crown ridge.
FIGURE 5 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)
FIGURE 5: Specimen of Potamotrygon tatianae sp. nov. (MZUSP 107671, male, 351 mm DW) photographed upon capture in the field (Río Madre de Díos, Peru). Courtesy of F. Reyda.
FIGURE 6 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)
FIGURE 6: Morphological details of Potamotrygon tatianae sp. nov. A) Eyes and spiracles of holotype (MZUSP 107673, male, 348 mm DW). B) Nasoral region of paratype (MZUSP 107667, male, 362 mm DW).
FIGURE 10 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)
FIGURE 10: Dorsal (A), ventral (B), lateral (C) and posterior (D) views of neurocranium of Potamotrygon tatianae sp. nov. (MZUSP 107671, male, 351 mm DW). Abbreviations: acv, anterior cerebral vein foramen; ac, anterior foramen for preorbital canal; anc, antorbital cartilage condyle; as, articular surface; elf, endolymphatic foramen; es, eye-stalk; saf, efferent spiracular artery foramen; fpf, frontoparietal fontanelle; fm, foramen magnum; hmf, hyomandibular facet; ic, internal carotid artery foramen; lc, lateral commisure; nc, nasal capsule; obf, orbital fissure; oc, occipital condyle; pcf, precerebral fontanelle; pc, posterior foramen for preorbital canal; plf, perilymphatic foramen; pop, postorbital process; pq, palatoquadrate; prp, preorbital process; soc, supraorbital crest; sp, supraorbital process; sup, superficial ophthalmic nerve foramina; II, optic nerve foramen; III, oculomotor nerve foramen; VII, hyomandibular branch of facial nerve foramen; IX, glossopharyngeal nerve foramen; X, vagus nerve foramen.
FIGURE 2 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)
FIGURE 2: Paratype of Potamotrygon tatianae sp. nov. (MZUSP 107667, male, 362 mm DW) in dorsal (A) and ventral (B) views (Río Madre de Díos, Peru).
FIGURE 4 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)
FIGURE 4: Specimen of Potamotrygon tatianae sp. nov. (MZUSP 107672, male, 291 mm DW) in dorsal (A) and ventral (B) views (Río Madre de Díos, Peru).
FIGURE 3 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)
FIGURE 3: Paratype of Potamotrygon tatianae sp. nov. (MZUSP 107668, female, 265 mm DW) in dorsal (A) and ventral (B) views (Río Madre de Díos, Peru).
FIGURE 1 in A New Species Of Neotropical Freshwater Stingray Of The Genus Potamotrygon Garman, 1877 From The Río Madre De Díos, Peru (Chondrichthyes: Potamotrygonidae)
FIGURE 1: Holotype of Potamotrygon tatianae sp. nov. (MZUSP 107673, male, 348 mm DW) in dorsal (A) and ventral (B) views (Río Madre de Díos, Peru).
FIGURE 38 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 38. Scanning Electron Microscope (SEM) images of dermal denticles of Potamotrygon garmani, sp. nov. (UNT 2173). A. Dorsal rostral region. B. Dorsal rostral region in detail. C. Dorsal head region. D. Dorsal head region in detail. E. Dorsal tail region. F. Dorsal tail region in detail. Abbreviations: Bp, basal plate; Br, basal ridge; Cr, coronal ridge; Co, corona; Cd, coronal dichotomy; Cp, coronal plate.
FIGURE 44 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 44. Holotype of Potamotrygon limai (MZUSP 104031, adult male, 498 mm DW, rio Jamari, rio Madeira basin). A. Dorsal view. B. Ventral view.
FIGURE 33 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 33. Holotype of Potamotrygon garmani, sp. nov. (UNT 2174, adult? male, 341 mm DW, rio Paranã, rio Tocantins basin, state of Tocantins, Brazil). A. Dorsal view. B. Ventral view.
FIGURE 31 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 31. Skeletal anatomy (from radiographs) of Potamotrygon amazona, sp. nov. (MZUSP 117344, adult male, 532 mm DW). A. Ventral view of anterior disc and jaws. B. Angular cartilages, left side. C. Pectoral girdle, ventral view. D. Tail thorns and clasper skeleton. E. Pelvic girdle and clasper. Scale bar: 10 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 35 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 35. Details of Potamotrygon garmani, sp. nov. (UNT 2174, adult? male, 341 mm DW). A. Dorsal head and snout. B. Dorsal view of tail origin, pelvic fins, and dorsal thorn rows. C. Mouth and nostrils. D. Ventral view of pelvic fins, clasper and cloaca. E. Dorsal clasper.
FIGURE 29 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 29. Scanning Electron Microscope (SEM) images of dermal denticles of Potamotrygon amazona, sp. nov. (based on MZUSP 117345) A. Dorsal rostral region. B. Dorsal 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 41 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 41. Illustration of the clasper skeleton of Potamotrygon garmani, sp. nov. (based on UNT uncat.) 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 28 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 28. Color variation in Potamotrygon amazona, sp. nov. A. MZUSP 117347 (adult male, 560 mm DW). B. MZUSP 117345 (adult male, 584 mm DW).
FIGURE 43 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 43. Distribution of species of the Potamotrygon scobina complex. Red circle: Potamotrygon scobina; red star: type locality of Potamotrygon scobina; purple diamond: Potamotrygon limai; yellow pentagon: Potamotrygon adamastor, sp. nov.; blue square: Potamotrygon amazona, sp. nov.; green triangle: Potamotrygon garmani, sp. nov.
FIGURE 27 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 27. Teeth of Potamotrygon amazona, sp. nov. (MZUSP 117345) A, B. Upper jaw. C, D. Lower jaw. Scale bar = 2 mm.
FIGURE 25 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 25. Paratype of Potamotrygon amazona, sp. nov. (MZUSP 117346, adult female, 405 mm DW, rio Jutaí, upper rio Amazonas basin, state of Amazonas, Brazil). A. Dorsal view. B. Ventral view.
FIGURE 24 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 24. Holotype of Potamotrygon amazona, sp. nov. (MZUSP 117344, adult male, 532 mm DW, rio Jutaí, upper rio Amazonas basin, state of Amazonas, Brazil). A. Dorsal view. B. Ventral view.
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