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Slekta hører til i familien neshornfugler, Bucerotidae.
U.art Penelopides affinis affinis (Legg til)Sulawesihornfugl, Penelopides exarhatus (Legg til)
U.art Penelopides affinis basilanica (Legg til)
U.art Penelopides exarhatus exarhatus (Legg til)Luzonhornfugl, Penelopides manillae (Legg til)
U.art Penelopides exarhatus sanfordi (Legg til)
U.art Penelopides manillae manillae (Legg til)Mindorohornfugl, Penelopides mindorensis (Legg til)
U.art Penelopides manillae subniger (Legg til)
U.art Penelopides panini panini (Legg til)Samarhornfugl, Penelopides samarensis (Legg til)
U.art Penelopides panini samarensis (Legg til)
U.art Penelopides panini ticaensis (Legg til)