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Potamotrygon magdalenae
(Duméril, 1865)
Magdalena river stingray
Classification: Elasmobranchii Myliobatiformes Potamotrygonidae
Reference of the original description
Histoire naturelle des poissons ou ichthyologie générale. Tome Premier. Elasmobranchés. Plagiostomes et Holocéphales ou Chimères. Librairie Encyclopédique de Roret, Paris. 720 pp
Histoire naturelle des poissons ou ichthyologie générale. Tome Premier. Elasmobranchés. Plagiostomes et Holocéphales ou Chimères. Librairie Encyclopédique de Roret, Paris. 720 pp
Image of the original description
No image in first description.
No image in first description.
Synonyms / new combinations and misspellings
Potamotrygon magdalenensis, Taeniura magdalenae
Potamotrygon magdalenensis, Taeniura magdalenae
Description :
Citation: Potamotrygon magdalenae (Duméril, 1865): In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 11/2024
Please send your images of "Potamotrygon magdalenae" to info@shark-references.com
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Taeniura magdalenae (in Steindacher, 1878) valid as: Potamotrygon magdalenae (Duméril, 1865)
Taeniura magdalenae (in Steindacher, 1878) valid as: Potamotrygon magdalenae (Duméril, 1865)
Common names
Raya, Raya de rio, 
Magdalena river stingray
Raya, Raya de rio, Magdalena river stingray
Biology
Prefers shallow muddy bottoms with turbid waters. Feeding analysis: Specimens: n=74 (7.50 to 22.25 cm DW, 41 females, 30 males, three individuals of unidentified sex, 59 individuals were juveniles, 12 were adults), Magdalena River, Columbia: three (4.05%) stomachs were empty, and a total of 45 food components (prey items) were identified.
The most frequent prey categories were Diptera (76.0%) and Trichoptera (23.9%). Chironomidae larvae and Ceratopogonidae larvae were the most frequent prey items (64.8% and 43.6%, respectively). Unidentified insect parts also showed a high frequency in the diet of P. magdalenae (50.7%). The most important prey categories according to prey-specific abundance by number (%PN) were Bivalvia and Diptera larvae (53.6% and 50.6%, respectively) and by mass (%PM) were Bivalvia and Oligochaeta (99.7% and 45.8%, respectively). Unidentified insect parts had a significant value for both indices (77.7% and 72.5%) [27396].
Prefers shallow muddy bottoms with turbid waters. Feeding analysis: Specimens: n=74 (7.50 to 22.25 cm DW, 41 females, 30 males, three individuals of unidentified sex, 59 individuals were juveniles, 12 were adults), Magdalena River, Columbia: three (4.05%) stomachs were empty, and a total of 45 food components (prey items) were identified.
The most frequent prey categories were Diptera (76.0%) and Trichoptera (23.9%). Chironomidae larvae and Ceratopogonidae larvae were the most frequent prey items (64.8% and 43.6%, respectively). Unidentified insect parts also showed a high frequency in the diet of P. magdalenae (50.7%). The most important prey categories according to prey-specific abundance by number (%PN) were Bivalvia and Diptera larvae (53.6% and 50.6%, respectively) and by mass (%PM) were Bivalvia and Oligochaeta (99.7% and 45.8%, respectively). Unidentified insect parts had a significant value for both indices (77.7% and 72.5%) [27396].
Habitat
benthopelagic; freshwater
benthopelagic; freshwater
Remarks
shark-references Species-ID=4955; CITES: (see: Protected Species for more details) Convention on International Trade in Endangered Speciesof Wild Fauna and Flora annex: III; Council Regulation 2017/160 annex: C
shark-references Species-ID=4955; CITES: (see: Protected Species for more details) Convention on International Trade in Endangered Speciesof Wild Fauna and Flora annex: III; Council Regulation 2017/160 annex: C
Parasites (arranged by Jürgen Pollerspöck)
Cestoda
Trematoda
Cestoda
- Acanthobothrium quinonesi Mayes, Brooks & Thorson, 1978 [16193] [16268] [649] [22567] [25154] [28741]
- Potamotrygonocestus magdalenensis Brooks & Thorson, 1976 [7632] [16268] [649] [16355] [22567] [25154]
- Rhinebothroides moralarai (Brooks & Thorson, 1976) Mayes, Brooks, & Thorson, 1981 [7632] [16268] [649] [16917] [22567] [25154]
- Rhinebothroides scorzai (Lopes-Neyra & Días-Ungría, 1958) [22567]
Trematoda
