Wee Nicholas Q-X, Cutmore Scott C, Cribb Thomas H
School of Biological Sciences, The University of Queensland, St Lucia, QLD, 4072, Australia.
Syst Parasitol. 2019 Apr;96(3):265-278. doi: 10.1007/s11230-019-09851-1. Epub 2019 Mar 22.
Four new monorchiid trematodes are reported from Moreton Bay, Australia; three new species of Provitellus Dove & Cribb, 1998 and one species of Ovipusillus Dove & Cribb, 1998, are described from Gnathanodon speciosus (Forsskål) (Carangidae), the golden trevally. Provitellus chaometra n. sp., Provitellus infrequens n. sp. and Provitellus infibrova n. sp. differ significantly from the only other species of this genus, Provitellus turrum Dove & Cribb, 1998, in the structure of the eggs, vitelline follicles and terminal organ. The four species are united, however, in the possession of short caeca and a long genital atrium, a combination not reported previously. Ovipusillus geminus n. sp. strongly resembles its only congener, Ovipusillus mayu Dove & Cribb, 1998, but differs in the morphology of the diverticulum in the cirrus-sac and the shape of the pharynx. Complete ITS2 and partial 28S rDNA sequence data were generated for all four species, as well as for two known species of Hurleytrematoides Yamaguti, 1953, Hurleytrematoides galzini McNamara & Cribb, 2011 and Hurleytrematoides loi McNamara & Cribb, 2011. These sequences were analysed with those for other monorchiids available on GenBank, and phylogenetic analyses showed that the four species of Provitellus and two species of Ovipusillus each form strongly supported clades. As with previous monorchiid phylogenetic studies, however, the overall resolution of the phylogeny of the Monorchiidae is poor.
从澳大利亚莫顿湾报道了四种新的单睾科吸虫；从黄斑魣（Gnathanodon speciosus (Forsskål)，鲹科），即金鲹中描述了1998年的Provitellus Dove & Cribb属的三个新物种和1998年的Ovipusillus Dove & Cribb属的一个物种。新种Provitellus chaometra、Provitellus infrequens和Provitellus infibrova在卵、卵黄滤泡和终末器官的结构上与该属的另一个物种，即1998年的Provitellus turrum有显著差异。然而，这四个物种都具有短盲肠和长生殖腔，这种组合以前未曾报道过。新种Ovipusillus geminus与其唯一的同属物种，即1998年的Ovipusillus mayu非常相似，但在阴茎囊憩室的形态和咽的形状上有所不同。为所有这四个物种以及1953年的Hurleytrematoides Yamaguti属的两个已知物种，即2011年的Hurleytrematoides galzini和2011年的Hurleytrematoides loi生成了完整的ITS2和部分28S rDNA序列数据。将这些序列与GenBank上其他单睾科吸虫的序列进行了分析，系统发育分析表明，Provitellus属的四个物种和Ovipusillus属的两个物种各自形成了得到有力支持的分支。然而与之前的单睾科系统发育研究一样，单睾科系统发育的总体分辨率较差。
