800
Journal of Paleontology 89(5):791–801
times the length of the first vertebra); in Diplomystidae it is about five times the length of the first vertebra. The neurocranium of Kooiichthys is relatively deep, although not so deep as that of Bachmanniidae and Diplomystidae. The common condition in Siluriformes is a suture between pterosphenoid and parasphenoid, a character that is not present in Bachmanniidae, Diplomystidae, and Kooiichthys (Arratia, 1987, figs. 5B, 23).
Acknowledgments
We are grateful to the Agencia Nacional de Promoción Científica y Tecnológica (Grant BID-PICT 2014-2357), Consejo Nacional de Investigaciones Científicas y Técnicas, and Universidad Nacional de La Plata for financial support;Museo Paleontológico Egidio Feruglio for permission to study thematerial; L. Rasia for some photographs; and L. Grande, J. Lundberg, and R. Vari for loan of material under their care. John Lundberg for suggestions, and corrections of the first draft; he allowed the inclusion of the unpublished matrix of catfishes.
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