1) Omomyid group 2) Taxon 3) Taxonomic category 4) Taxonomic group 
[n] - extinct tiny nocturnal lower primates that fed on fruit and insects
Omomyid group noun extinct tiny nocturnal lower primates that fed on fruit and insects; abundant in North America and Europe 30 to 50 million years ago; probably gave rise to the tarsiers; some authorities consider them ancestral to anthropoids but...