Mathews Patrick D, Naldoni Juliana, Adriano Edson A
Department of Animal Biology, Institute of Biology, University of Campinas- UNICAMP, Avenida Bertrand Russel, s/n, Cx. 6109, 13083-970 Campinas, SP, Brazil.
Department of Ecology and Evolutionary Biology, Federal University of São Paulo-UNIFESP, Rua Professor Arthur Riedel, 275, Jardim Eldorado, 09972-270 Diadema, SP, Brazil.
Acta Trop. 2017 Dec;176:51-57. doi: 10.1016/j.actatropica.2017.07.017. Epub 2017 Jul 25.
A new species of Myxosporea, Henneguya loreotoensis n. sp. is described parasitizing the gill filaments from 17 of 35 specimens (48.5%) of Corydoras leucomelas (Siluriformes: Callichthyidae) caught in the Nanay River, near village Ninarumi, in the Loreto state, Peru. Mature spores were ellipsoidal in shape from the frontal view, measuring 36.2±0.1μm (36.1-36.3) in total length, 14.3±0.1μm (14.2-14.4) in body length, 5.1±0.1μm (4.9-5.3) in width and 21.9±0.1μm (21.8-22.0) in the caudal process. The two polar capsules were symmetrical and elongated, measuring 5.1±0.1μm (4.9-5.3) in length and 2.4±0.2μm (2.1-2.7) in width, containing a polar filament with five coils arranged obliquely to the longitudinal axis. The sporoplasm was binucleate. Partial sequencing of the ssu-rDNA of H. loretoensis n. sp. resulted in a total of 1676 nucleotides, and this sequence did not match any of the myxozoan available in the GenBank. The phylogenetic analysis shows H. loretoensis n. sp. as a sister species of Henneguya paraensis, another amazonian myxozoan parasite of Cichla temensis (Perciformes: Cichlidae).
描述了一种新的粘孢子虫物种，洛雷托亨内古亚虫（Henneguya loreotoensis n. sp.），它寄生于在秘鲁洛雷托省尼纳鲁米村附近的纳奈河中捕获的35条黑纹兵鲶（Siluriformes: Callichthyidae）中的17条（48.5%）的鳃丝上。从正面看，成熟孢子呈椭圆形，全长36.2±0.1μm（36.1 - 36.3），体长14.3±0.1μm（14.2 - 14.4），宽5.1±0.1μm（4.9 - 5.3），尾部长21.9±0.1μm（21.8 - 22.0）。两个极囊对称且细长，长5.1±0.1μm（4.9 - 5.3），宽2.4±0.2μm（2.1 - 2.7），包含一条与纵轴倾斜排列的有五个线圈的极丝。孢子质为双核。洛雷托亨内古亚虫（H. loretoensis n. sp.）的小亚基核糖体DNA（ssu - rDNA）部分测序共得到1676个核苷酸，该序列与GenBank中任何可用的粘孢子虫序列均不匹配。系统发育分析表明，洛雷托亨内古亚虫（H. loretoensis n. sp.）是帕拉亨内古亚虫（Henneguya paraensis）的姐妹物种，帕拉亨内古亚虫是慈鲷科（Perciformes: Cichlidae）的坦氏丽鱼（Cichla temensis）的另一种亚马逊粘孢子虫寄生虫。
