Min Mi-Sook, Baek Hae-Jun, Song Jae-Young, Chang Min Ho, Poyarkov Nikolay A Jr
Conservation Genome Resources Bank for Korean Wildlife (CGRB) and Research Institute for Veterinary Science College of Veterinary Medicine, Seoul National University, Seoul 08826, South Korea; Email:
Conservation Genome Resources Bank for Korean Wildlife (CGRB) and Research Institute for Veterinary Science College of Veterinary Medicine, Seoul National University, Seoul 08826, South Korea; Email: unknown.
Zootaxa. 2016 Sep 21;4169(3):475-503. doi: 10.11646/zootaxa.4169.3.4.
We describe a new species of lentic-breeding Hynobius salamander from the Naro Islands, near the village of Bongrae-myeon, Goheung-gun, Jeollanam-do, South Korea, on the basis of results of morphological, ecological and genetic analyses. Hynobius unisacculus sp. nov. is distinguished from its congeners by a combination of the following morphological attributes: (1) comparatively small size (adult SVL up to 61 mm; range 38.3-60.3 mm in males and 37.5-59.9 mm in females); (2) relatively slender short limbs; tips of fore- and hindlimbs adpressed on body never meeting, but separated by a large gap (gap of -3.0 to -1.5 costal folds in males and -3.5 to -1.5 in females); (3) comparatively short tail (TL/SVL ratio in adult males varying from 0.54-0.98, in adult females from 0.55 to 0.89), tail flattened and with a low dorsal fin extending to the posterior one-third of tail length; (4) usually 11 (occasionally 12) costal grooves; (5) in adults, dark brown dorsum with indistinct bronze or dark copper spots, lighter greyish-white or pinkish belly; (6) well developed fifth toe; (7) comparatively shallow vomerine tooth series with 13-23 vomerine teeth; (8) small, pigmented ova, located in one, occasionally two, strings in a small, curved egg sac with folded envelope, lacking distinct mucous stalks or whiptail-like structures on both ends. The molecular differentiation among Korean Hynobius is high; Hynobius unisacculus sp. nov. is genetically highly divergent from the morphologically similar H. leechii, H. yangi and H. quelpaertensis: pairwise distances are 9.7%, 9.1% and 8.0% of sequence divergence at the COI mtDNA gene respectively, and 10.9%, 10.9% and 9.4% of sequence divergence at the cyt b mtDNA gene, respectively. At present, the new species is known from coastal areas and offshore islands in southeastern part of Jeollanam-do in South Korea. We suggest the species should be considered as Vulnerable (Vu2a) in accordance with IUCN's Red List categories. Our study supports the presence of undiagnosed taxonomic diversity among Korean Hynobius.
基于形态学、生态学和遗传学分析结果，我们描述了一种来自韩国全罗南道固城郡凤来面附近罗岛的水栖繁殖的蝾螈新物种。单囊 hynobius 新物种与其同属物种的区别在于以下形态特征的组合：(1) 体型相对较小（成年个体的 SVL 可达 61 毫米；雄性范围为 38.3 - 60.3 毫米，雌性为 37.5 - 59.9 毫米）；(2) 四肢相对细长且短；前肢和后肢贴于身体时，指尖从不相交，而是被一个大间隙隔开（雄性间隙为 -3.0 至 -1.5 个肋褶，雌性为 -3.5 至 -1.5 个肋褶）；(3) 尾巴相对较短（成年雄性的 TL/SVL 比率在 0.54 - 0.98 之间变化，成年雌性在 0.55 至 0.89 之间），尾巴扁平，背鳍低，延伸至尾巴长度的后三分之一；(4) 通常有 11 条（偶尔 12 条）肋沟；(5) 成年个体中，背部深褐色，有不明显的青铜色或深铜色斑点，腹部较浅，呈灰白色或粉红色；(6) 第五趾发育良好；(7) 犁骨齿列相对较浅，有 13 - 23 颗犁骨齿；(8) 小的、有色素的卵，位于一个（偶尔两个）弯曲的小卵囊中，卵囊有折叠的包膜，两端没有明显的粘液柄或鞭尾状结构。韩国 hynobius 之间的分子分化程度很高；单囊 hynobius 新物种在基因上与形态相似的李氏 hynobius、杨氏 hynobius 和济州 hynobius 高度分化：在 COI mtDNA 基因上的两两序列差异分别为 9.7%、9.1%和 8.0%，在 cyt b mtDNA 基因上的序列差异分别为 10.9%、10.9%和 9.4%。目前，这个新物种仅在韩国全罗南道东南部的沿海地区和近海岛屿被发现。我们建议根据国际自然保护联盟（IUCN）的红色名录类别，将该物种视为易危（Vu2a）。我们的研究支持韩国 hynobius 中存在未被识别的分类多样性。
