PaleoDB taxon number: 368532

Alternative combinations: Larus (Chroicocephalus) philadelphia, Larus philadelphia, Sterna philadelphia

Belongs to Chroicocephalus according to J. F. Clements et al. 2017

Sister taxa: Chroicocephalus bulleri, Chroicocephalus cirrocephalus, Chroicocephalus hartlaubii, Chroicocephalus novaehollandiae, Chroicocephalus ridibundus