Besprozvannykh V V, Atopkin D M, Ermolenko A V, Nikitenko A Yu
Institute of Biology and Soil Science, Far Eastern Branch, Russian Academy of Sciences,Prospect 100-letija, 159,Vladivostok690022,Russia.
J Helminthol. 2015 Sep;89(5):565-76. doi: 10.1017/S0022149X14000443. Epub 2014 Jun 11.
New data relating to the fauna of Haploporidae (Digenea) in mugilid fish from Primorsky Region of the south of the Russian Far East are presented. In the most recent revision of the family Haploporidae Nicoll, 1914, Parasaccocoelium Zhukov, 1971 was synonymized with Pseudohapladena Yamaguti, 1952 (Overstreet & Curran, 2005). Here, we restore the genus Parasaccocoelium. The species described by Zhukov can be distinguished from the species Pseudohapladena sensu Yamaguti, 1952 using a combination of the following features: (1) diffuse or absent eye-spot pigment; (2) subterminal or terminal oral sucker; (3) present or absent genital atrium; and (4) vitellarium with two large and compact vitelline masses, or vitelline follicles tubular and divided into two groups. For the species of Pseudohapladena, i.e. P. scatophagi, Yamaguti noted that the vitelline follicles occupy almost the entire post-testicular region, but in the present specimens, the vitelline follicles do not occupy the post-testicular region. Based on the diagnosis of Pseudohapladena by Overstreet & Curran (2005), the genus Parasaccocoelium differs in the following features: (1) a single testis that is longitudinal, longitudinally oval, spherical, transversally oval, irregular, bilobed or V-shaped, or a testis that is subspherical to irregular to elongate; (2) the vitellarium in the lateral fields formed from large compact follicles that have an irregular form and extend between the anterior margin of the ventral sucker or pharynx and posterior margin of the testis, and the vitelline follicles do not occupy post-testicular regions; or the vitellarium consists of elongate groups of follicles that usually extend at least one-half of a body length and extend to the posterior end of the body in some and to the posterior margin of the testis in others; (3) the eggs are operculate, unembryonated and developed when laid, or the eggs in some cases are only operculate; and (4) a developed miracidium with or without an eye spot. New data have been added to the description of Parasaccocoelium mugili Zhukov, 1971 based on new material, and two new species of this genus, Pa. haematocheilum n. sp. from Liza haematocheila and Pa. polyovum n. sp. from L. haematocheila and Mugil cephalus, are described using morphological and molecular approaches. We support the taxonomic status of the genus Parasaccocoelium and its inclusion within the sub-family Waretrematinae, and we consider Pseudohapladena lizae Liu et Yang, 2002 to be a junior synonym of Parasaccocoelium mugili Zhukov, 1971.
本文给出了俄罗斯远东地区南部滨海边疆区鲻科鱼类中haploporidae（复殖目吸虫）动物群的新数据。在1914年Nicoll对Haploporidae科的最新修订中，1971年的Parasaccocoelium Zhukov被同义化为1952年的Pseudohapladena Yamaguti（Overstreet & Curran，2005）。在此，我们恢复Parasaccocoelium属。朱可夫描述的物种可以通过以下特征组合与1952年Yamaguti定义的Pseudohapladena属物种区分开来：（1）眼点色素弥散或无；（2）口吸盘位于亚末端或末端；（3）生殖腔存在或不存在；（4）卵黄腺有两个大而紧密的卵黄块，或卵黄滤泡呈管状并分为两组。对于Pseudohapladena属的物种，即P. scatophagi，Yamaguti指出卵黄滤泡几乎占据整个睾丸后区域，但在本标本中，卵黄滤泡不占据睾丸后区域。根据Overstreet & Curran（2005）对Pseudohapladena的诊断，Parasaccocoelium属在以下特征上有所不同：（1）单个睾丸呈纵向、纵向椭圆形、球形、横向椭圆形、不规则形、双叶形或V形，或睾丸呈亚球形至不规则形至细长形；（2）侧叶中的卵黄腺由大的紧密滤泡形成，这些滤泡形状不规则，在腹吸盘或咽的前缘与睾丸后缘之间延伸，且卵黄滤泡不占据睾丸后区域；或卵黄腺由细长的滤泡群组成，通常至少延伸体长的一半，在某些情况下延伸至身体后端，在其他情况下延伸至睾丸后缘；（3）卵有卵盖，产卵时未受精且已发育，或在某些情况下卵仅具卵盖；（4）毛蚴发育完全，有或无眼点。基于新材料，已在对1971年的Parasaccocoelium mugili Zhukov的描述中添加了新数据，并使用形态学和分子方法描述了该属的两个新物种，即来自红鳍东方鲀的Pa. haematocheilum n. sp.和来自红鳍东方鲀及鲻的Pa. polyovum n. sp.。我们支持Parasaccocoelium属的分类地位及其归入Waretrematinae亚科，并且我们认为2002年的Pseudohapladena lizae Liu et Yang是1971年的Parasaccocoelium mugili Zhukov的次异名。
