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Morphological characterization of the venom secretory epidermal cells in the stinger of marine and freshwater stingrays
(Elsevier B.V., 2007-10-01)
Marine and freshwater stingrays are characterized by the presence of one to three mineralized serrated stingers on the tail, which are covered by epidermal cells secreting venom. When these animals are dorsally touched, ...
Comparative study on extracts from the tissue covering the stingers of freshwater (Potamotrygon falkneri) and marine (Dasyatis guttata) stingrays
(Elsevier B.V., 2007-10-01)
Stingrays are elasmobranchs found along the seacoast and in some rivers of Brazil. Pain is the most conspicuous symptom observed in patients wounded by the bilaterally retroserrate stingers located in the tail, which are ...
Histopathological changes induced by extracts from the tissue covering the stingers of Potamotrygon falkneri freshwater stingrays
(Pergamon-Elsevier B.V. Ltd, 2011-02-01)
Pain is the most conspicuous symptom observed in patients wounded by stingrays, and skin necrosis is common in accidents by freshwater stingrays. The extract from the stinger integumentary tissue of Potamotrygon falkneri ...
Histopathological changes induced by extracts from the tissue covering the stingers of Potamotrygon falkneri freshwater stingrays
(Pergamon-Elsevier B.V. Ltd, 2011-02-01)
Pain is the most conspicuous symptom observed in patients wounded by stingrays, and skin necrosis is common in accidents by freshwater stingrays. The extract from the stinger integumentary tissue of Potamotrygon falkneri ...
Significance of stingrays (Chondrichthyes: Myliobatiformes) as prey of crocodilians (Reptilia: Crocodylia) in non-marine environments
(Verlag Dr Friedrich Pfeil, 2020-06)
Stingrays (Myliobatiformes) co-occur with many crocodilians (alligators, caimans and crocodiles) in non-marineenvironments of tropical and subtropical regions. However, predation by crocodilians on stingrays is rare. Here,we ...
Cleaning interactions between shrimps (palaemonidae) and freshwater stingrays (potamotrygonidae) in the Paraná River, Southeastern Brazil
(2014-01-01)
We report the first record of cleaning symbiosis between a river stingray, Potamotrygon falkneri, and a palaemonid shrimp, Macrobrachium jelskii. Shrimps of different sizes were observed cleaning adult stingrays partially ...
Cleaning interactions between shrimps (Palaemonidae) and freshwater stingrays (Potamotrygonidae) in the Parana River, Southeastern Brazil
(Verlag Dr. Friedrich Pfeil, 2014-04-01)
We report the first record of cleaning symbiosis between a river stingray, Potamotrygon falkneri, and a palaemonid shrimp, Macrobrachium jelskii. Shrimps of different sizes were observed cleaning adult stingrays partially ...
An intriguing model for 5S rDNA sequences dispersion in the genome of freshwater stingray Potamotrygon motoro (Chondrichthyes: Potamotrygonidae)
(Springer, 2015-05-01)
5S rDNA genes of the stingray Potamotrygon motoro were PCR replicated, purified, cloned and sequenced. Two distinct classes of segments of different sizes were obtained. The smallest, with 342 bp units, was classified as ...