Abstract—

A Leucochloridium sp. Carus, 1835 sporocyst with a mature colored broodsac was found in a Succinea putris L., 1758 snail in the Boksitogorsk district of Leningrad Region (Russia). The pigmentation of the sporocyst’s broodsac was different from those of other Leucochloridium Carus, 1835 species previously described for Europe. The obtained sporocyst is most similar by the coloration of its broodsac to the trematodes of the same genus from Japan. The genotyping of the investigated sporocyst by the rDNA gene fragments (complete ITS1, ITS2, 5.8S and partial 18S and 28S sequences) was conducted. Genetic distances between the obtained sporocyst and the previously described species of the genus Leucochloridium were higher than intraspecific ones in the most cases. These data and the data of morphological analysis imply that the investigated sporocyst belongs to a separate species of the Leucochloridium genus, previously not described in the European region.

中文翻译：

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在 Succinea putris 蜗牛中发现异常颜色的 Leucochilidium 属孢子囊

摘要-

无色氯化藻sp . Carus, 1835 孢子囊在列宁格勒地区（俄罗斯）Boksitogorsk 区的Succinea putris L., 1758 蜗牛中被发现，带有成熟的彩色抱囊。孢子囊的色素沉着与之前在欧洲描述过的其他Leucocholidium Carus（1835 种）的色素沉着不同。获得的孢子被的育囊颜色与来自日本的同属吸虫最为相似。通过 rDNA 基因片段（完整的 ITS1、ITS2、5.8S 和部分 18S 和 28S 序列）对所研究的孢子被进行基因分型。在大多数情况下，获得的孢子被与之前描述的白氯藻属物种之间的遗传距离高于种内遗传距离。这些数据和形态分析数据表明，所研究的孢子被属于白氯藻属的一个单独物种，以前在欧洲地区没有描述过。