Notas sobre dos especies de raya de agua dulce (C[h]ondrichthyes, Potamotrygonidae) =
Subtitle: Note on two fresh-water sting-rays (C[h]ondrichthyes, Potamotrygonidae)
By: Mariano N. Castex y D.R. Yagolkowski.
Contributors: Yagolkowski, D. R., joint author.
Series: Acta scientifica ;; 9
Publisher: Dto. de Zoología del Ilafir, Universidad del Salvador
Published: 1970
Place of publication: San Miguel [Argentina]
Language: spa
Number of pages: 26
Subjects: Potamotrygon schroederi -- Classification.; Potamotrygon pauckei -- Classification.; Fishes -- Classification.; Fishes -- South America -- Classification.
Other titles: Notas sobre dos especies de raya de agua dulce ...; Note on two fresh-water sting-rays ...
Notes: Bibliography: p. 22.
English and Spanish.