Abstract：
We report four new species of monorchiids infecting teleost fishes from Australian waters. Two new species of Paralasiotocus Wee, Cutmore, Pérez-del-Olmo & Cribb, 2020, Pa. abstrusus n. sp. and Pa. tectus n. sp., are described from haemulids of the Great Barrier Reef. The two species are morphologically cryptic and occur in sympatry but differ significantly in cox1 mtDNA and ITS2 rDNA sequence data. Paralasiotocus tectus n. sp. is found only in Plectorhinchus albovittatus (Rüppell) whereas Pa. abstrusus n. sp. infects Pl. albovittatus, Plectorhinchus flavomaculatus (Cuvier) and Plectorhinchus lineatus (Linnaeus). The two species differ from all known species of Paralasiotocus in the possession of a clear gap in the spines of the terminal organ. A new species is described from a mullid, Parupeneus spilurus (Bleeker), from off Heron Island and Moreton Bay. The new species is morphologically broadly consistent with the concept of Paralasiotocus in the possession of an unspined genital atrium, bipartite terminal organ, and lobed ovary. However, it possesses a highly lobed cirrus and is phylogenetically widely separated from the two species of Paralasiotocus characterized here, and thus we propose Lobucirruatus infloresco n. g., n. sp. Proctotrema prominens n. sp., is described from Pl. albovittatus. It is differentiated from all other species of Proctotrema in the combination of a prominent metraterm, slightly fusiform body, slightly funnel-shaped oral sucker, elongate cirrus-sac, unlobed ovary, and caeca that terminate in the post-testicular region.
摘要：
我们报告了四种新的单兰物种，它们感染了澳大利亚水域的硬骨鱼。两种新的副拉索索氏病种，卡特莫尔,Pérez-del-Olmo&Cribb,2020年，Pa。抽象n.sp.爸爸。tectusn.sp.,是从大堡礁的血吸虫中描述的。这两个物种在形态上是神秘的，并以共生方式发生，但在cox1mtDNA和ITS2rDNA序列数据上存在显着差异。鼻旁吸虫n.sp.仅在Plectorhinchusalbovittatus（Rüppell）中发现，而Pa。抽象n.sp.感染Pl.albovittatus,黄草藻（居维叶）和品系（林奈）。这两个物种与所有已知的副拉索科物种的不同之处在于，末端器官的棘具有明显的间隙。一个新的物种被描述为从一个新的物种，Parupeneusspilurus（Bleeker），来自苍鹭岛和摩顿湾。新物种在形态上与拥有未旋转的生殖器心房的Paralasiotocus的概念大致一致，两股终末器官，和浅叶卵巢。然而,它具有高度浅裂的卷云，并且在系统发育上与此处表征的两种副拉拉索科动物广泛分离，因此，我们提出了Lobucirruatusinflorescon.g.，n.sp.Proctotrema突出n.sp.,从Pl描述。albovittatus.它与Proctotrema的所有其他物种的区别在于突出的节拍器组合，略梭形的身体，略呈漏斗状的口腔吸盘，细长的卷云囊，未裂开的卵巢，和终止于睾丸后区域的盲肠。
