Peak diversity of Cretaceous galatheoids (Crustacea, Decapoda) from northern Spain

► Galatheoids from the fossil record have not been well studied. ► Galatheoids from the Albian/Cenomanian Aldoirar patch reef in Spain were studied. ► Ten species are reported including four new species and two new genera. ► Galatheoid fauna is the richest on species and genus level for the Cretaceous. ► Species richness is probably related to reefal facies in which the fauna was found.