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228 results for “Potamotrygon”
Fig. 2 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. 2. Original illustration of NMW 78655 made by Johann Natterer after he collected the specimen; observe the position of ocelli on the disc compared to Fig. 1 (identical to specimen). Modified from Teixeira et al. (1999).
Fig. 10 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. 10. Potamotrygon motoro. Detail of dorsal coloration: (a) tricolored ocelli in NUP 2106, adult female, 405 mm DW, (b) bicolored ocelli around eyes of NUP 2106, (c) tetracolored ocelli founded in NUP 4136.
Fig. 5 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. 5. Potamotrygon motoro. Dorsal (a) and ventral (b) views of an adult female specimen, MZUSP 110924, 479 mm DW, from the Padre Inácio River.
Fig. 25. 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. 25. Potamotrygon pantanensis, n. sp. Dorsal (a) and ventral (b) views of paratype, MZUSP 110889, adult female, 325 mm DW, from Cuiabá River.
Fig. 17 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. 17. Potamotrygon motoro. Anatomical details from radiographs of lectotype NMW 78655 (a) and paralectotype ZMB 4662 (b). Abbreviations: AAC, anterior angular cartilage; PAC, posterior angular cartilage.
Fig. 21 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. 21. An original photograph (a) found in Castex's archives of the first male specimen of P. pauckei published in Castex 1963a (a specimen of P. amandae, sp. nov.); (b) MFA 232 a P. motoro specimen designated by Castex (1964) as lectotype of P. pauckei (this specimen was also analyzed by Rosa, 1985); (c) stuffed P. motoro specimen MFA 246, adult female, 495 mm DW. Specimen MFA 246 is still identified and exposed as P. pauckei in the Florentino Ameghino museum in Santa Fé, Argentina.
Fig. 1 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. 1. Potamotrygon motoro. Dorsal (a) and ventral (b) views of lectotype, NMW 78655, juvenile male, 208 mm DW, Guaporé River.
Fig. 16 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. 16. Potamotrygon motoro. Dorsal and ventral views of neurocranium and mandibular arch of specimen MZUSP 110908 showing mandibular arch structures. Abbreviations: AAC, anterior angular cartilage; CL, calcified ligament; DLP, dorsolateral process; HYO, hyomandibula; MC, Meckel's cartilage; PAC, posterior angular cartilage; PQ, palatoquadrate.
Fig. 13 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. 13. Potamotrygon motoro. Ventral canals of lateral line system in an adult female, MZUSP 111908, 343 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. 14 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. 14. Potamotrygon motoro. Neurocranium of an adult male specimen, MZUSP 111905, 310 mm DW, in (a) dorsal, (b) ventral, (c) lateral and (d) posterior views. Abbreviations: ACVF, anterior cerebral vein foramen; AFP I and II, anterior foramen of preorbital canal I and II; AOC, antorbital cartilage condyle; AS, articular surface; ELF, endolymphatic foramen; EPB, epiphysial bar; ESAF, efferent spiracular artery foramen; FPF, frontoparietal fontanelle; FM, foramen magnum; HF, hyomandibular facet; ICAF, internal carotid artery foramen; NA, nasal aperture; NC, nasal capsule; OC, occipital condyle; OF, orbital fissure; PCF, precerebral fontanelle; PFP I and II, posterior foramen of preorbital canal I and II; PFL, perilymphatic foramen; POP, postorbital process; PRP, preorbital process; SOC, supraorbital crest; SP, supraorbital process; II, optic nerve foramen; IV, trochlear nerve foramen; VII, facial nerve foramen; X, vagus nerve foramen.
Fig. 20 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. 20. Distribution of Potamotrygon motoro in the ParanáParaguay system. Yellow circles show localities where specimens of P. motoro were examined in this study. Yellow star indicates Guaporé River, the type locality of P. motoro.
Fig. 12 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. 12. Potamotrygon motoro. (a) dorsal view of tail showing entire dorsal row of pointed spines and the well-developed lateral rows in an adult female, MZUSP 110887, 396 mm DW; (b) showing the single row and format of enlarged pointedspines in an adult male, NUP 4136; (c) detail of some enlarged pointed-spines of dorsal row in adult female (MZUSP 110887).
Fig. 15 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. 15.Potamotrygon motoro. Cleared-and-stained neurocranium of a juvenile male specimen (MZUSP 111909, 188 mm DW) in lateral (a) view, showing details of foramina and their locations. Detail of foramina in orbital region (b) and of epiphysial bar in dorsal fontanelle (c). Abbreviations: ACVF, anterior cerebral vein foramen; EPB, epiphysial bar; ES, eye-stalk; ESAF, efferent spiracular artery foramen; FPF, frontoparietal fontanelle; HF, hyomandibular facet; ICAF, internal carotid artery foramen; IVF, interorbital vein foramen; LC, lateral comissure; OF, orbital fissure; PCF, precerebral fontanelle; PCVF, posterior cerebral vein foramen; II, optic nerve foramen; III, oculomotor nerve foramen; IV, trochlear nerve foramen; VII, facial nerve foramen; IX, glossopharyngeal nerve foramen.
Fig. 19 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. 19. Potamotrygon motoro. Dorsal and ventral views of clasper skeletal structures, MZUSP 111905. Abbreviations: AT, accessory terminal; AX, axial cartilage; BE, β-cartilage; B1, basal segment 1; B2, basal segment 2; DM, dorsal marginal cartilage; DT2, dorsal terminal 2 cartilage; VM, ventral marginal cartilage; VT, ventral terminal cartilage.
Fig. 9 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. 9. Potamotrygon motoro. Dorsal view of right clasper of an adult male, NUP 4136. Abbreviations: ap, apopyle; cg, clasper groove; dp, dorsal pseudosiphon; hp, hypopyle; vp, ventral pseudosiphon.
Fig. 8 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. 8. Potamotrygon motoro. Jaws of adult specimens showing dimorphic sexual morphology. Left (a) an adult female, MZUSP 110902, 362 mm DW, and right (b) an adult male, NUP 4136. Note the morphological differences between the teeth of both specimens and between the rows in the same specimen.
Fig. 22 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. 22. Detail of dermal denticles in the central dorsal disc region of of MFA 232, a specimen of Potamotrygon motoro designated by Castex (1964) as lectotype of P. pauckei.
Fig. 4 in Karyotype description and evidence of multiple sex chromosome system X X X X /X X Y in Potamotrygon aff. motoro and P. falkneri (Chondrichthyes: Potamotrygonidae) in the upper Paraná River basin, Brazil
Fig. 4. Karyotypes of female (a) and male (b) of Potamotrygon falkneri sample from Porto Rico, highlighting the sex chromosomes after conventional and the chromosomes marked by NOR. Scale bar = 10 m.
Fig. 2 in Karyotype description and evidence of multiple sex chromosome system X X X X /X X Y in Potamotrygon aff. motoro and P. falkneri (Chondrichthyes: Potamotrygonidae) in the upper Paraná River basin, Brazil
Fig. 2. Karyotypes of female (a) and male (b) of Potamotrygon aff. motoro sample from Porto Rico, highlighting the sex chromosomes after conventional and the chromosomes marked by NOR. Scale bar = 10 m.
Fig. 1 in Karyotype description and evidence of multiple sex chromosome system X X X X /X X Y in Potamotrygon aff. motoro and P. falkneri (Chondrichthyes: Potamotrygonidae) in the upper Paraná River basin, Brazil
Fig. 1. Meiotic chromosomes of Potamotrygon falkneri sample from Ilha Solteira. Spermatogonial metaphase (2n = 65 chromosomes) after Giemsa staining (a) and metaphase I, with 31 bivalents and a trivalent (arrow) (b).
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