Zootaxa 4290 (1): 001–042 ISSN 1175-5326 (print edition) http://www.mapress.com/j/zt/ Article ZOOTAXA Copyright © 2017 Magnolia Press ISSN 1175-5334 (online edition) https://doi.org/10.11646/zootaxa.4290.1.1 http://zoobank.org/urn:lsid:zoobank.org:pub:25836DE9-00C1-43FB-9742-2E427FD5C8A0 Taxonomic revision of the New World genus Ariopsis Gill (Siluriformes: Ariidae), with description of two new species ALEXANDRE P. MARCENIUK1,2,6, ARTURO ACERO P.3, RICHARD COOKE4 & RICARDO BETANCUR-R5 1Museu Paraense Emílio Goeldi, 66040–170, Belém, PA, Brazil. E-mail:
[email protected] 2Acervo Zoológico, Universidade Santa Cecília, 11045–907, Santos, SP, Brazil. 3Universidad Nacional de Colombia sede Caribe, Cecimar, El Rodadero, Santa Marta, Colombia. E-mail:
[email protected] 4Smithsonian Tropical Research Institute, MRC 0580-08, Apartado 0843-03092, Ciudad de Panama, República de Panama. E-mail:
[email protected] 5Department of Biology, University of Puerto Rico, Rió Piedras, P.O. Box 23360, San Juan 00931, Puerto Rico. E-mail:
[email protected] 6Corresponding author Table of contents Abstract . 1 Introduction . 2 Materials and methods . 2 Results . 3 Ariopsis Gill, 1861. 3 Ariopsis assimilis (Günther, 1864) . 4 Ariopsis canteri, new species Acero P., Betancur-R. & Marceniuk . 9 Ariopsis felis (Linnaeus, 1766) . 14 Ariopsis gilberti (Jordan & Williams, 1895). 19 Ariopsis jimenezi, new species . 27 Ariopsis seemanni (Günther, 1864) . 31 Ariopsis simonsi (Starks, 1906) . 35 Key to the species of Ariopsis . 39 Discussion . 39 Acknowledgements . 40 Literature cited. 40 Abstract The taxonomy of sea catfishes (Ariidae) has had a complex history. A recent checklist of catfish species recognized Ari- idae as having by far the highest number of species with uncertain status among siluriform families.