Table 1 in Palaeoxylotomical Study Of A New Collection From Zarand Miocene Petrified Forest, South Apuseni Mts.

Table 1 Key of identification of Fagaceous wood (after Petrescu, 1976, slightly modified)
Vessels, perforationsRaysExtant taxaValid fossil taxaType AStructures with solitary vessels or grouped (2-3 or more), with simple and scalariform perforations on vesselsFine rays (1-3-seriate) and compact multiseriate.Fagus NothofagusFagoxylon, NothofagoxylonType BExclusively uniseriate raysCastanea CastanopsisCastanoxylonStructures with solitary vessels, simple perforated, sometimes some scalariform, with few barsUniseriate and compact multiseriate rays, sometimes compact-composed or, partially aggregate rays Uniseriate and multiseriate aggregate raysQuercus LithocarpusQuercoxylon