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A small slug from a tropical greenhouse reveals a new rathouisiid lineage with triaulic tritrematic genitalia (Gastropoda: Systellommatophora)
Zoological Journal of the Linnean Society ( IF 3.0 ) Pub Date : 2022-07-25 , DOI: 10.1093/zoolinnean/zlac054
Giuseppe Manganelli 1 , Andrzej Lesicki 2 , Andrea Benocci 3 , Debora Barbato 1 , Danio Miserocchi 4 , Joanna R Pieńkowska 2 , Folco Giusti 1
Affiliation  

A small slug found in the tropical greenhouse of the Science Museum (MUSE) of Trento (Italy) turned out to be a species of the little-known systellommatophoran family Rathouisiidae. We undertook detailed comparative anatomical and molecular studies using specimens of the MUSE slug, Rathouisia sinensis, and sequences of other systellommatophoran species deposited in GenBank to conduct a systematic and phylogenetic assessment. Analysis of the genitalia of the MUSE slug and R. sinensis revealed an unusual triaulic tritrematic structure: two separate female ducts – one for egg release (oviduct), the other for intake of allosperm (vagina) – and a separate male duct for autosperm release. Analysis of the nucleotide sequences of several mitochondrial (COI, 16S rDNA) and nuclear (18S rDNA, ITS2 flanked by 5.8S and 28S rDNA fragments, H3) gene fragments supported assignation of the MUSE slug to Rathouisiidae, but also its distinction from the other rathouisiid genera Atopos, Granulilimax, Rathouisia and an undescribed genus from the Ryukyu Islands (Japan). Therefore, we decided to describe the MUSE slug as a new species in a new genus: Barkeriella museensis gen. et sp. nov. The species is certainly an alien introduced into the tropical greenhouse of MUSE, but its origin is unknown and calls for further investigation.

中文翻译:

一个来自热带温室的小蛞蝓揭示了一个新的具有三叶三棱生殖器的rathouisiid谱系(腹足纲:Systellommatophora)

在特伦托(意大利)科学博物馆 (MUSE) 的热带温室中发现的一种小蛞蝓原来是鲜为人知的 systellommatophoran 家族 Rathouisiidae 的一种。我们使用保存在 GenBank 中的 MUSE 蛞蝓、中华鼠尾草和其他 systellommatophoran 物种的序列进行了详细的比较解剖学和分子研究,以进行系统的系统发育评估。对 MUSE 蛞蝓和 R. sinensis 的生殖器的分析揭示了一个不寻常的三叶三叶结构:两个独立的雌性管道——一个用于释放卵子(输卵管),另一个用于摄入异乳(阴道)——以及一个用于释放自体精子的单独雄性管道. 分析几种线粒体(COI,16S rDNA)和核(18S rDNA,ITS2 两侧为 5.8S 和 28S rDNA 片段)的核苷酸序列,H3) 基因片段支持将 MUSE 蛞蝓归属于 Rathouisiidae,但也支持将其与其他 rathouisiid 属 Atopos、Granulilimax、Rathouisia 和来自琉球群岛(日本)的未描述属的区别。因此,我们决定将 MUSE 蛞蝓描述为一个新属的新物种:Barkeriella museensis gen。等人。十一月 该物种肯定是被引入 MUSE 热带温室的外星人,但其起源尚不清楚,需要进一步调查。
更新日期:2022-07-25
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