The fossil plants assemblages from Chiuzbaia are located in the north part of the Baia Mare, on the southern slope of Igniş Mountain, at 800 m altitude. This fossil flora is of Pannonian age. The sample fossil material comes from the diatomite outcropping of the Izvorul Plopilor creek (fossil point F). Quercus givulescui (Fagaceae) represent new species for the Chiuzbaia fossil flora. It’s a simple leaf, with an elliptic form, almost complete, well preserved with lamina and a normal petiole. It is a leaf with a lobed margin. The venation type is simple, craspedodromous. It’s the biggest fossil leaf found at Chiuzbaia till present (98.85 cm2, mesophyll). In the Pannonian domain, based on the K-Ar ages, the fossil flora from Chiuzbaia, can be included between the Sarmatian fossil flora from Felsötárkány and Pannonian fossil flora from Tiszapalkonya and Dozmat (Hungary). Quercus givulescui has a good resemblance with the current species Quercus cataneaefolia. It’s a medium height tree that vegetates both in riparian forests and in mesophytic forests. Quercus givulescui has the name of the Romanian paleobotanist R. Givulescu, who had studied the Miocene fossil flora from Chiuzbaia for more than 20 years.