A high-resolution ostracode faunal study at Ocean Drilling Program (ODP) Site 738 (Kerguelen Plateau, Southern Indian Ocean. ~1,100 meters paleodepth) through the Paleocene-Eocene Thermal Maximum (PETM) rapid global v arming event (~55 Ma) has revealed abrupt faunal turnovers associated with ocean warming and acidification. The PETM is marked by a transient carbon isotope excursion (CIE) of -2-3‰, which is broken into three time-intervals for fauna l comparisons: Pre-CIE, CIE. and Post-CIE. Ostracode accumulation rates, abundance, and richness decreased during the ClE but subsequently recovered. Cluster and ordination analyses show distinct differences among fauna before, during, and after the CIE. Site 738 ostracode faunal changes are compared to previous work by Steineck and Thomas (1996) on Site 689 to begin a global synthesis of ostracode faunal response. Similar generic turnover occurs at both sites, with typically infaunal genera appearing in higher percentages during and after the CIE. Platycopids, a clade of epifaunal suspension-feeding ostracodes, are proposed by Whatley and co-workers to be preadapted to low-oxygen conditions. Percent platycopids were therefore predicted to increase during the CIE. a time of presumed decreased dissolved-oxygen concentration in deep- and intermediate-waters. However, at both sites, platycopid percentages do not increase until the post-CIE recovery interval. This platycopid increase is coeval with a well-documented increase in benthic foraminifera taxa associated with high surface export-production environments, leading us to hypothesize that increased food availability may play a more direct role in the observed platycopid increase during the post-CIE.