The mis-spelling of Haplorhini and haplorhine arose in English wiki. The word is made of haplo, meaning one, and rhini, meaning nose (plural). It's usually translated as "simple nosed".
Related terms, Catarrhini (down nosed: Old World monkeys plus Apes), Platyrrhini (flat nosed: New World monkeys) and Strepsirrhini (wet nosed: lemurs and the extinct adapiforms) and are correctly spelt with "rr". Macdonald-ross (talk) 09:02, 11 April 2015 (UTC)