Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan.
School of Life Science, National Taiwan Normal University, Taipei, Taiwan.
PLoS One. 2022 Aug 29;17(8):e0272966. doi: 10.1371/journal.pone.0272966. eCollection 2022.
Species of colourful arboreal snails of the genus Amphidromus from Southeast Asia commonly exhibit high intraspecific variation in shell morphology. Although highly polymorphic Amphidromus specimens with different colouration have been collected at the same locality and were revealed to possess similar genital organs, there is yet no morphometric or DNA analyses of these different shell morphs. This study is the first to reveal that both striped and stripeless morphs of A. cruentatus from Laos and Vietnam belong to the same mitochondrial (COI and 16S rRNA) lineage. Although the shell colouration between the striped and stripeless morphs is markedly different, morphometric and shell outline-based analyses indicated an overall similarity in shell shape. We also revised the systematics of A. cruentatus, in which we treated similar related species, namely A. eudeli, A. fuscolabris, A. thakhekensis, A. gerberi bolovenensis, A. goldbergi, A. pengzhuoani, A. eichhorsti and A. pankowskiae as junior synonyms of A. cruentatus. Amphidromus daoae, A. anhdaoorum, A. stungtrengensis, A. yangbayensis and A. yenlinhae, which were formerly regarded as junior synonyms, are considered as species different from A. cruentatus based on shell morphology and morphometric analyses. Preliminary phylogenetic analyses also retrieved some Amphidromus species groups as distinct mitochondrial lineages.
东南亚色彩斑斓的树栖蜗牛属 Amphidromus 物种的壳形态具有高度的种内变异性。虽然在同一地点采集到了具有不同颜色的高度多态性 Amphidromus 标本,并且它们被证明具有相似的生殖器,但这些不同壳形态的形态测量或 DNA 分析尚未进行。本研究首次揭示了来自老挝和越南的 A. cruentatus 的条纹和无条纹形态都属于同一线粒体(COI 和 16S rRNA)谱系。尽管条纹和无条纹形态之间的壳颜色明显不同,但形态测量和基于壳轮廓的分析表明壳形状总体上相似。我们还修订了 A. cruentatus 的系统发育,将相似的相关物种,即 A. eudeli、A. fuscolabris、A. thakhekensis、A. gerberi bolovenensis、A. goldbergi、A. pengzhuoani、A. eichhorsti 和 A. pankowskiae,作为 A. cruentatus 的次同义词进行了处理。以前被认为是次同义词的 Amphidromus daoae、A. anhdaoorum、A. stungtrengensis、A. yangbayensis 和 A. yenlinhae,基于壳形态和形态测量分析,被认为是不同于 A. cruentatus 的物种。初步的系统发育分析还检索到一些 Amphidromus 物种群作为不同的线粒体谱系。