Dutton Haley R, Bullard Stephen A
Auburn University, School of Fisheries, Aquaculture and Aquatic Sciences and Aquatic Parasitology Laboratory, Auburn, Alabama, USA.
Folia Parasitol (Praha). 2020 May 15;67:2020.013. doi: 10.14411/fp.2020.013.
Ruavermis mikebargeri gen. et sp. n. infects the yellow-headed temple turtles Heosemys annandalii (Boulenger et Robinson) in the Mekong River Basin. It resembles Platt Roberts et Bullard, 2018 and Coeuritrema Mehra, 1933 by having the anterior to posterior anatomical sequence of a ventral sucker, external seminal vesicle, cirrus sac, anterior testis, ovary, transverse vitelline duct, and posterior testis. These genera are further similar by having the combination of an elongate/ovoid aspinous body, a ventral sucker at the level of the body constriction, an oesophagus that terminates in the anterior 1/5 of the body and that is ventral to the anterior nerve commissure, intestinal caeca that bifurcate in the anterior 1/3 of the body (not immediately anterior to the ventral sucker), a sinistral caecum that bends toward the midline at level of the cirrus and common genital pore, an external seminal vesicle that abuts the anterodextral margin of the cirrus sac, an oviduct that emerges from the dextral margin of the ovary, and an oviducal seminal receptacle that comprises the middle portion of the oviduct. These genera lack lateral oesophageal diverticulae and a median oesophageal diverticulum. The new genus is unique by having a papillate ventral body surface, an external seminal vesicle lateral to the cirrus sac, vasa efferentia that are ventral to the gonads, an oviduct that is convoluted, a Laurer's canal pore that is preovarian, a Laurer's canal that extends anterolaterad, and an excretory vesicle that is Y-shaped. The 28S rDNA phylogenetic analysis recovered the new species sister to Coeuritrema platti Roberts et Bullard, 2016, with that clade sister to Hapalorhynchus spp. and Platt spp. The new turtle blood fluke is the fourth from Vietnam, second from a Vietnam geomydid, and first from Heosemys Stejneger as well as the first endohelminth from the yellow-headed temple turtle.
迈克巴杰氏鲁阿吸虫（Ruavermis mikebargeri）新属新种寄生于湄公河流域的黄头庙龟（Heosemys annandalii，布伦格和罗宾逊命名）。它在腹吸盘、外精囊、阴茎囊、前睾丸、卵巢、横位卵黄管和后睾丸的前后解剖顺序上与普拉特罗伯茨和布拉德于2018年描述的属以及1933年的科特里吸虫属（Coeuritrema）相似。这些属的进一步相似之处在于具有细长/卵形无棘身体、身体缢缩水平处的腹吸盘、在身体前1/5处终止且位于前神经连合腹侧的食管、在身体前1/3处（并非紧接在腹吸盘前方）分叉的肠盲囊、在阴茎和共同生殖孔水平处向左弯曲的左侧盲囊、邻接阴茎囊右前边缘的外精囊、从卵巢右侧边缘发出的输卵管以及构成输卵管中部的输卵管受精囊。这些属没有侧食管憩室和中食管憩室。新属的独特之处在于腹面体表有乳头状突起、阴茎囊外侧有外精囊、输出管位于性腺腹侧、输卵管盘绕、劳尔氏管孔位于卵巢前方、劳尔氏管向前外侧延伸以及排泄囊呈Y形。28S rDNA系统发育分析显示新物种与2016年普拉特罗伯茨和布拉德描述的科特里吸虫（Coeuritrema platti）为姐妹种，该分支与哈帕罗吸虫属（Hapalorhynchus）和普拉特属（Platt）为姐妹种。这种新的龟血吸虫是越南的第四种、越南地龟科龟类的第二种、来自庙龟属（Heosemys）施泰因内格的第一种，也是黄头庙龟的第一种体内寄生虫。
