<p><i>Bakonybatrachus fedori</i> is a small-bodied, discoglossid frog originally described on four incomplete bones (holotype ilium, and referred maxilla, angulosplenial, and scapula) from the Upper Cretaceous (Santonian) Iharkút fossil vertebrate locality in Hungary. Since <i>B. fedori</i> was described in 2012, ongoing excavations and screen-washing at Iharkút have yielded another incomplete maxilla and three ilia referrable to the same species. These new specimens corroborate most osteological details for <i>B. fedori</i> (e.g. maxilla is not ornamented labially and bears teeth; ilium bears a distinctive dorsal protuberance and low dorsal crest) and reveal intraspecific variation in the ilium (relative heights of the dorsal protuberance and the dorsal crest vary, and some ilia have a shallow concavity between the dorsal protuberance and dorsal crest). <i>B. fedori</i> continues to be interpreted as a moderately strong swimmer and jumper, had a peri-aquatic lifestyle, and along with a larger neobatrachian frog and potentially two albanerpetontid species was part of a low diversity lissamphibian assemblage that lived during the Santonian in a floodplain environment in the Iharkút area. As with the broader vertebrate assemblage documented at Iharkút, the lissamphibian assemblage consisted of Laurasian (<i>B. fedori</i> and albanerpetontids) and Gondwanan (the neobatrachian frog) components.</p>