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27 results for “Plesiotrygon”
FIGURE 14 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 14: Details of the skeleton and dermal covering in holotype of Plesiotrygon nana sp. nov., from radiograph (MUSM 20328, adult male, 1024 mm TL, 243 mm DL, 247 mm DW). A) Splanchnocranium and scapular region. B) Angular cartilage magnified. C) Base of tail region showing arrangement of dorsal spines and denticles. For an anatomical guide, refer to Figure 15. Scale bar = 1 cm.
FIGURE 16 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 16: Distribution of specimens of Plesiotrygon examined in this study (see text for details). Square with star: holotype of P. nana (Río Pachitea, tributary of Río Ucayali, near Puerto Inca, Peru). Open square: paratypes of P. nana (representing two separate, but proximal, localities). Closed square: specimen collected and photographed from Rio Solimões in 1996. Closed circle with star: holotype of P. iwamae (Rio Solimões, above Tefé). Open circles: paratypes of P. iwamae. Closed circles: non-type specimens of P. iwamae. Base map by M.J. Weitzman.
FIGURE 10 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 10: Small, free-living specimen of Plesiotrygon nana sp. nov. MZUSP 57642, juvenile or preadult female 912 mm TL, 124 mm DL, 118 mm DW. Characters that allow it to be identified as P. nana include its dorsal color pattern, dark purplish-brown caudal whip, proportionally smaller spiracles and nasoral region, and ventral lateral-line canals. Photo courtesy M. Toledo-Piza.
FIGURE 6 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 6: Paratype of Plesiotrygon nana sp. nov., in dorsal (A) and ventral (B) views (MZUSP 108777, juvenile female, 463 mm TL, 81 mm DL, 72 mm DW, Río Itaya, tributary of Río Nanay, near Iquitos, Peru).
FIGURE 9 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 9: Dorsal (A, B) and external (C) aspect of clasper of holotype of Plesiotrygon nana sp. nov. (MUSM 20328, adult male, 243 mm DL, 247 mm DW). Abbreviations: CG, clasper groove; DPS, dorsal pseudosiphon; VPS, ventral pseudosiphon (mostly concealed in dorsal view). Scale bar = 1 cm.
FIGURE 5 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 5: Paratype of Plesiotrygon nana sp. nov., in dorsal (A) and ventral (B) views, shortly after capture (MZUSP 108777, juvenile female, 463 mm TL, 81 mm DL, 72 mm DW, Río Itaya, tributary of Río Nanay, near Iquitos, Peru). Image courtesy of F. Marques.
FIGURE 7 in An Unusual, Dwarf New Species Of Neotropical Freshwater Stingray, Plesiotrygon Nana Sp. Nov., From The Upper And Mid Amazon Basin: The Second Species Of Plesiotrygon (Chondrichthyes: Potamotrygonidae)
FIGURE 7: Dorsal (A) and ventral (B) discs of paratype of Plesiotrygon nana sp. nov. (MZUSP 108777, juvenile female, 463 mm TL, 81 mm DL, 72 mm DW, Río Itaya, tributary of Río Nanay, near Iquitos, Peru).
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OpenNeuro
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