Occurrence of Dipetalonema gracile in a wild population of woolly monkey Lagothrix poeppiigii in the northeastern Peruvian Amazon

Abstract Dipetalonema gracile (Rudolphi, 1809) (Filarioidea: Onchocercidae) is one of six species of cavities filarial parasites of Neotropical non-human primates. The present study recorded the occurrence of D. gracile, provides morphological and morphometric data and extends the geographical distribution. Adult filariae were obtained from the thoracic and abdominal cavities of 38 specimens of woolly monkey, which were used for local human consumption, in the northeastern Peruvian Amazon. Male and female filarids were processed and analysed using light and scanning electron microscopy. Details of the cephalic papillae, post-cloacal bands and papillae, vulva, phasmid position and lateral appendages are showed by scanning electron microscopy and is recorded the occurrencce of Lagothrix poeppigii monkey as a new host of this filaria in the Yavari-Mirin river basin, Peruvian Amazon.

摘要：纤细双睾线虫（Dipetalonema gracile, Rudolphi, 1809）隶属于丝虫总科（Filarioidea）盘尾丝虫科（Onchocercidae），是新热带区非人灵长类的6种体腔寄生丝虫之一。本研究记录了纤细双睾线虫的检出情况，提供了其形态学与形态测量学数据，并扩展了该物种的地理分布范围。研究样本采自秘鲁亚马逊东北部地区：研究人员从用于当地人类食用的38只绒毛猴的胸腔与腹腔中分离获得成虫丝虫。通过光学显微镜与扫描电子显微镜对雌雄成虫进行处理与分析。扫描电子显微镜详细展示了头乳突、泄殖腔后带与乳突、阴门、尾感器位置及侧附器的形态特征；同时记录了在秘鲁亚马逊亚瓦里-米林河流域发现的普尔基绒毛猴（Lagothrix poeppigii）为该丝虫的新宿主。