Abstract
The teeth of two new genera of jalodontid sharks have been found in the strata of the Middle Permian in the Guadalupe Mountains area of West Texas. Isacrodus marthae gen. et sp. nov. occurs in the Williams Ranch Member, Cutoff Formation, Roadian. A second taxon Texasodus varidentatus gen. et sp. nov. is found in beds of the Hegler and Pinery Members, Bell Canyon Formation, Upper Wordian–Lower Capitanian. The family Jalodontidae includes Jalodus, Adamantina and the two new genera; Isacrodus and Texasodus.
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