<Li> Ursine colobus, Colobus vellerosus </Li> <Li> Mantled guereza, Colobus guereza </Li> <Li> Genus Piliocolobus--red colobuses <Ul> <Li> Western red colobus, Piliocolobus badius </Li> <Li> Pennant's colobus, Piliocolobus pennantii </Li> <Li> Preuss's red colobus, Piliocolobus preussi </Li> <Li> Thollon's red colobus, Piliocolobus tholloni </Li> <Li> Central African red colobus, Piliocolobus foai </Li> <Li> Niger Delta red colobus, Piliocolobus epieni </Li> <Li> Ugandan red colobus, Piliocolobus tephrosceles </Li> <Li> Uzungwa red colobus, Piliocolobus gordonorum </Li> <Li> Zanzibar red colobus, Piliocolobus kirkii </Li> <Li> Tana River red colobus, Piliocolobus rufomitratus </Li> </Ul> </Li> <Ul> <Li> Western red colobus, Piliocolobus badius </Li> <Li> Pennant's colobus, Piliocolobus pennantii </Li> <Li> Preuss's red colobus, Piliocolobus preussi </Li> <Li> Thollon's red colobus, Piliocolobus tholloni </Li> <Li> Central African red colobus, Piliocolobus foai </Li> <Li> Niger Delta red colobus, Piliocolobus epieni </Li> <Li> Ugandan red colobus, Piliocolobus tephrosceles </Li> <Li> Uzungwa red colobus, Piliocolobus gordonorum </Li> <Li> Zanzibar red colobus, Piliocolobus kirkii </Li> <Li> Tana River red colobus, Piliocolobus rufomitratus </Li> </Ul>

Identify the features shared by old world monkeys