Sehgal Ravinder N M, Iezhova Tatjana A, Marzec Timothy, Valkiūnas Gediminas
Department of Biology, San Francisco State University, 1600 Holloway Ave., San Francisco, California, 94132.; Email:
Nature Research Centre, Institute of Ecology, Akademijos 2, LT-08412, Vilnius, Lithuania.; Email:
Zootaxa. 2015 Oct 29;4034(2):342-50. doi: 10.11646/zootaxa.4034.2.6.
Trypanosoma naviformis n. sp. is described from the African olive sunbird Cyanomitra olivacea in Ghana based on the morphology of its hematozoic trypomastigotes and partial sequences of the small subunit ribosomal RNA gene. This parasite belongs to the group of small non-striated avian trypanosomes (< 30 µm in length in average) with the kinetoplast situated close to the posterior end of the body. Trypanosoma naviformis can be distinguished from other small avian trypanosomes due to its poorly visible flagellum, central position of its nucleus, and the symmetrically (in relation to the nucleus) narrowing of both ends of the hematozoic trypomastigotes, which are boat-like in shape. Illustrations of trypomastigotes of the new species are given, and SSU rDNA lineages associated with this parasite are documented. This parasite has been reported in Ghana and Cameroon and was also found in the yellow-whiskered greenbul, Andropadus latirostris in these countries. It appears to be widespread in its range given the distribution of these bird species in Africa.
基于其血液内锥鞭毛体的形态以及小亚基核糖体RNA基因的部分序列，在加纳从非洲橄榄太阳鸟（Cyanomitra olivacea）中描述了舟形锥虫（Trypanosoma naviformis）新种。这种寄生虫属于小型无条纹鸟类锥虫类群（平均长度小于30 µm），动基体位于身体后端附近。舟形锥虫可与其他小型鸟类锥虫区分开来，因为其鞭毛不易看见、细胞核位于中央位置，且血液内锥鞭毛体两端（相对于细胞核）对称变窄，呈船形。给出了新种锥鞭毛体的图示，并记录了与该寄生虫相关的小亚基核糖体DNA谱系。这种寄生虫已在加纳和喀麦隆被报道，在这些国家的黄须绿鸫（Andropadus latirostris）中也有发现。鉴于这些鸟类在非洲的分布情况，它似乎分布广泛。
