"Character / Species";"R. infuscatum";"R. septemdentatum";"R. siculum";"R. sticticum" "Brood cells per nest";2–4;1–2;1;"1 (2)" "Closing plug";"resin + soil particles";resin;"resin + shell particles + sand";"resin + soil particles" "Septa between brood cells";yes;yes;no;no Filling;no;yes;no;yes "Individual pollen specialisation";N/A;no;no;yes "Moving shells";N/A;no;yes;no