Periodic shedding and replacement of venomous caudal spines, with special reference to South American freshwater stingrays, Potamotrygon spp. Environmental Biology of Fishes, 23(4), 299–314
DOI: 10.1007/BF00005241
Plesiotrygon iwamae, a new genus and species of neotropical freshwater stingray (Chondrichthyes: Potamotrygonidae). Copeia, 1987(2), 447–458
The evolution of freshwater adaptation in stingrays. National Geographic Society Research Reports, 15: 663–694
Reproduction and development of the South American freshwater stingrays, Potamotrygon circularis and P. motoro. Environmental Biology of Fishes, 9(1), 3–24
DOI: 10.1007/BF00001055
Age, growth and longevity of Carcharhinus leucas estimated from tagging and vertebral rings. Copeia, 1982(1), 110–116
The impact of commercial exploitation on sawfish and shark populations in Lake Nicaragua. Fisheries, 7(2), 2–10
DOI: 10.1577/1548-8446(1982)007<0002:TIOCEO>2.0.CO;2
The bull shark (Carcharhinus leucas) and largetooth sawfiish (Pristis perotteti) in Lake Bayano, a tropical man-made impoundment in Panama. Environmental Biology of Fishes, 7(4), 341–347
DOI: 10.1007/BF00005568
Life history implications of a tagging study of the largetooth sawfish, Pristis perotteti, in the Lake Nicaragua-Río San Juan system. Environmental Biology of Fishes, 7(3), 207–228
DOI: 10.1007/BF00002497
Freshwater stingrays (Potamotrygonidae) and their helminth parasites: testing hypotheses of evolution and coevolution. In V.A. Funk and D.R. Brooks(editors), Advances in cladistics, proceedings of the first meeting of the Willi Hennig Society: 147–175. New York: New York Botanical Society. Buchheim, H.P. 1994. Paleoenvironments, lithofacies and ''varves'' of the Fossil Butte Member of the Green River Formation, southwestern Wyoming. Contributions to Geology 30(1): 3– 14.
Systematic review of cestodes infecting freshwater stingrays (Chondrichthyes: Potamotrygonidae) including four new species from Venezuela. Proceedings of the Helminthological Society of Washington, 48, 43–64
Two new tetraphyllidean cestodes from Potamotrygon circularis Garman (Chondrichthyes: Potamotrygonidae) in the Itacuaí River, Brazil. Proceedings of the Helminthological Society of Washington, 48(1), 38–42
Cestode parasites in Myliobatis goodei Garman (Myliobatiformes: Myliobatidae) from Río de la Plata, Uruguay, with a summary of cestodes collected from South American elasmobranchs during 1975-1979. Proceedings of the Biological Society of Washington, 93, 1239–1252
A new species of Echinocephalus (Nematoda: Gnathostomidae) from Neotropical stingrays with comments on E. diasi. Journal of Parasitology, 67(3), 433–439
Potamotrygonocotyle tsalickisi, new genus and species (Monogenea: Monocotylidae) and Paraheteronchocotyle amazonensis, new genus and species (Monogenea: Hexabothriidae) from Potamotrygon circularis Garman (Chondrichthyes: Potamotrygonidae) in northwestern Brazil. Proceedings of the Biological Society of Washington, 94, 1205–1210
La explotacion excesiva del pez sierra, Pristis perotteti en el Lago Nicaragua. ConCiencia, 7(1): 11–13
Paravitellotrema overstreeti n. sp. (Digenea: Hemiuridae) from the Colombian freshwater stingray Potamotrygon magdalenae Dumeril. Proceedings of the Helminthological Society of Washington, 46(1), 52–54
Rectal gland of freshwater stingrays, Potamotrygon spp. (Chondrichthyes: Potamotrygonidae). Biological Bulletin, 154(3), 508–516
Marine fish in a fresh-water lake. Explorers Journal Sept.: 114–119
Two new species of Acanthobothrium van Beneden 1849 (Cestoidea: Tetraphyllidea) from freshwater stingrays in South America. Journal of Parasitology, 64(5), 838–841
The Bull shark, Carcharhinus leucas, from the Missisipi River near Alton, Illinois. Copeia, 1977(1), 166–168
Effects of saline acclimation on plasma electrolytes, urea excretion, and hepatic urea biosynthesis in a freshwater stingray, Potamotrygon sp. Garman, 1877. Comparative Biochemistry and Physiology – Part A, Physiology, 56(1), 87–93
DOI: 10.1016/0300-9629(77)90446-7
The status of the Lake Nicaragua shark: an updated appraisal. In Investigation of the ichthyofauna of Nicaraguan lakes, edited by T.B. Thorson. Lincoln, Nebraska, University of Nebraska Press: 561–574
Observations on the reproduction of the sawfish, Pristis perotteti, in Lake Nicaragua, with recommendations for its conservation. In Investigation of the ichthyofauna of Nicaraguan lakes, edited by T.B. Thorson. Lincoln, Nebraska, University of Nebraska Press: 641–650
Two Tetraphyllidean Cestodes from the Freshwater Stingray Potamotrygon magdalenae Dumeril 1852 (Chondrichthyes: Potamotrygonidae) from Colombia. Journal of Parasitology, 62(6), 943–947
Partitioning of Body Fluids in the Lake Nicaragua Shark and Three Marine Sharks. In Investigation of the ichthyofauna of Nicaraguan lakes, edited by T.B. Thorson. Lincoln, Nebraska, University of Nebraska Press: 577–578
Helminths from elasmobranchs in Central American fresh waters. In Investigation of the ichthyofauna of Nicaraguan lakes, edited by T.B. Thorson. Lincoln, Nebraska, University of Nebraska Press 629–640
Sexual Dimorphism in Number of Rostral Teeth of the Sawfish, Pristis perotteti Müller and Henle, 1841. In Investigation of the ichthyofauna of Nicaraguan lakes, edited by T.B. Thorson. Lincoln, Nebraska, University of Nebraska Press: 612–614
Body Fluid Solutes of Juveniles and Adults of the Euryhaline Bull Shark Carcharhinus leucas from Freshwater and Saline Environments. In Investigation of the ichthyofauna of Nicaraguan lakes, edited by T.B. Thorson. Lincoln, Nebraska, University of Nebraska Press: 599–612
Comparison of Some Parameters of Serum and Uterine Fluid of Pregnant, Viviparous Sharks (Carcharhinus leucas) and Serum of Their Near-Term Young. In Investigation of the ichthyofauna of Nicaraguan lakes, edited by T.B. Thorson. Lincoln, Nebraska, University of Nebraska Press: 591–598
The Status of the Freshwater Shark of Lake Nicaragua. In Investigation of the ichthyofauna of Nicaraguan lakes, edited by T.B. Thorson. Lincoln, Nebraska, University of Nebraska Press: 385–402
Movement of Bull Sharks, Carcharhinus leucas, Between Carribean Sea and Lake Nicaragua Demonstrated by Tagging. In Investigation of the ichthyofauna of Nicaraguan lakes, edited by T.B. Thorson. Lincoln, Nebraska, University of Nebraska Press: 531–532
Reassignment of the African freshwater stingray, Potamotrygon garouaensis, to the genus Dasyatis, on physiologic and morphologic grounds. Copeia, 1975(4), 701–712
Occurrence of the sawfish, Pristis perotteti, in the Amazom River, with notes on P. pectinatus. Copeia, 1974(2), 560–564
Sexual dimorphism in number of rostral teeth of the sawfish, Pristis perotteti Müller and Henle, 1841. Transactions of the American Fisheries Society, 102(3), 612–614
DOI: 10.1577/1548-8659(1973)102<612:SDINOR>2.0.CO;2
Body fluid solutes of juveniles and adults of the euryhaline bull shark Carcharhinus leucas from freshwater and saline environments. Physiological Zoology, 46(1), 29–42
The status of the Bull shark, Carcharhinus leucas, in the Amazon River. Copeia, 1972(3), 601–605
Comparison of some parameters of serum and uterine fluid of pregnant, viviparous sharks (Carcharhinus leucas) and serum of their near-term young. Comparative Biochemistry and Physiology – Part A, Physiology, 42(1), 33–40
DOI: 10.1016/0300-9629(72)90363-5
Movement of bull sharks, Carcharhinus leucas, between Caribbean Sea and Lake Nicaragua demonstrated by tagging. Copeia, 1971(2), 336–338
Freshwater stingrays, Potamotrygon spp: failure to concentrate urea when exposed to saline medium. Life Sciences, 9(15), 893–900
DOI: 10.1016/0024-3205(70)90059-7
Potamotrygon spp.: elasmobranchs with low urea content. Science, 158, 375–377
Osmoregulation in fresh-water elasmobranchs. In P.W. Gilbert, R.F. Mathewson, & D.P. Rall, (Eds.), Sharks, skates and rays. (pp. 265–270). John Hopkins Press, Baltimore
The status of the freshwater shark of Lake Nicaragua. Copeia, 1966(3), 385–402
Sharks and sawfish in the Lake Izabal-Rio Dulce system, Guatemala. Copeia, 1966(3), 620–622
