title: Tetrapetalonema (T.) colombiensis sp. n. (Nematoda: Filarioidea) from Colombian primates.
abstract: Tetrapetalonema (T.) colombiensis sp. n., a filarial nematode from the subcutaneous and intermuscular connective tissues of squirrel monkeys (Saimiri sciureus) and tufted ringtail monkeys (Cebus apella) from central Colombia is described. Tetrapetalonema colombiensis is a very small species (male 8 mm, females 11-21 mm), and within the subgenus most closely resembles T. panamensis and T. saimiri in dimensions and in general appearance. It can be distinguished from these species by the following major features: smoothly rounded profile of the anterior extremity; single pair of lateral caudal petals in the male; vagina vera directed immediately posteriad in the female; and a large (295-335 by 4.3-6.7 micron) microfilaria that assumes a gently curved attitude in 2% aqueous formalin preparations (Knott's technique), and which has a conspicuous inner body.
mesh_terms: D000818:Animals; D002427:Cebidae / Q000469:parasitology*; D002428:Cebus / Q000469:parasitology*; D003238:Connective Tissue / Q000469:parasitology; D005260:Female; D005370:Filarioidea / Q000302:isolation & purification*; D008297:Male; D008842:Microfilariae / Q000302:isolation & purification; D012453:Saimiri / Q000469:parasitology*