Giese Elane G, Santos Jeannie N, Lanfredi Reinalda M
Laboratório de Biologia Celular-Centro de Ciências Biológicas, Universidade Federal do Pará, Av. Augusto Correa, s/n CEP. 66075.110 Belém, Pará, Brazil.
J Parasitol. 2009 Apr;95(2):407-12. doi: 10.1645/GE-1680.1.
Procamallanus (Spirocamallanus) belenensis n. sp. is described using light and scanning electron microcopy, based on specimens taken from Ageneiosus ucayalensis, Castelnau, 1855 (Pisces: Siluriforme), a freshwater fish commonly called mandubé, in Pard State, Brazil; Procamallanus (Spirocamallanus) rarus is recorded from the same host. To our knowledge there are no previous reports of nematodes from this fish species. Procamallanus (S.) belenensis is characterized by the presence of 8-13 cuticular spiral thickenings coating 2/3 of posterior region of the buccal capsule of males and females (the anterior third is smooth); small sub-equal spicules; 3 and 4-5 pairs of pre- and post-cloacal papillae, respectively; the proportion of muscular and glandular esophagus is 1:1.5-2; males present 2 spike-like projections at the tail tip, which are absent in females by light microscopy. The most closely related species are Procamallanus (Spirocamallanus) inopinatus and Procamallanus (Spirocamallanus) pintoi. The new species differs from the most closely related species by the presence of 8-10 cuticular spiral thickenings in the buccal capsule of males and 9-13 in the females, 8 pairs of male clocal papillae (3 pre- and 5 post-cloacal, respectively), and only males bearing 2 minute, spike-like projections at the posterior end.
基于采自巴西帕拉州一种俗称曼杜贝的淡水鱼乌卡亚利阿格尼鱼（1855年，卡斯泰尔诺命名，硬骨鱼纲：鲇形目）的标本，运用光学显微镜和扫描电子显微镜对贝氏原线虫（旋尾原线虫属）新种进行了描述；在同一宿主中记录到稀有原线虫（旋尾原线虫属）。据我们所知，此前尚无关于该鱼类线虫的报道。贝氏原线虫（旋尾原线虫属）的特征为：雌雄虫口囊后2/3区域有8 - 13条角质层螺旋加厚（前三分之一平滑）；亚等长的小交合刺；泄殖腔前和泄殖腔后乳突分别为3对和4 - 5对；肌质食管与腺质食管比例为1:1.5 - 2；雄性尾尖有2个尖刺状突起，光学显微镜下雌性无此结构。与其关系最密切的物种是意外原线虫（旋尾原线虫属）和平托原线虫（旋尾原线虫属）。该新物种与关系最密切的物种的区别在于，雄虫口囊有8 - 10条角质层螺旋加厚，雌虫有9 - 13条；雄虫有8对泄殖腔乳突（泄殖腔前3对，泄殖腔后5对），且仅雄性后端有2个微小的尖刺状突起。
