Rosa, R.S. & Castello, H.P. & Thorson, T.B. (1987)
Plesiotrygon iwamae, a new genus and species of neotropical freshwater stingray (Chondrichthyes: Potamotrygonidae). Copeia, 1987(2), 447–458

Castello, H.P. (1974)
Southern distribution limits for Myliobates goodei (Garman) - Chondrichthyes, Myliobatidae. Arquivos de Ciências do Mar, 14(1), 62–63

Castello, H.P. (1973)
Comentarios sobre cuatro ejemplares de rara coloración de Gymnura altavela (Chondrichthyes, Gymnuridae). Acta Scientifica, N.S. 1(2), 1–10

Castello, H.P. (1971)
Contribución al conocimiento sistemático y biológico de Zapteryx brevirostris (Müller & Henle, 1841) de la costa atlántica marplatense (Chondrichthyes, Rhinobatidae). Physis, 80, 619–629

Castex, M.N. & Castello, H.P. (1970)
Potamotrygon leopoldi, a new species of freshwater sting-ray for the Xingú River, Brazil (Chondrichthyes, Potamotrygonidae). Acta Scientifica, Universidad del Salvador, 10, 1–16

Castex, M.N. & Castello, H.P. (1970)
Potamotrygon yepezi, n. sp. (Condrichthyes, (sic) Potamotrygonidae), a new species of freshwater sting-ray from Venezuelan rivers. Acta Scientifica, Universidad del Salvador, 8, 15–39

Castello, H.P. & Yagolkowski, D.R. (1969)
Potamotrygon castexi (Condrichthyes, Potamotrygonidae), a new species of freshwater sting-ray for the Paraná River. Acta Scientifica, Universidad del Salvador, 6, 1–21, 1 pl.