蜑螺属Nerita几个混淆种的比较研究(腹足纲, 珍珠蜑螺目, 蜑螺科)*
作者简介:陈志云(1982—), 女, 陕西省安康市人, 副研究员, 博士, 主要从事海洋贝类分类学研究。E-mail: chenzhiyun@scsio.ac.cn
收稿日期: 2017-07-24
要求修回日期: 2017-10-19
网络出版日期: 2018-05-03
基金资助
国家自然科学基金项目 (41406185)
中国科学院经典分类学青年人才项目 (ZSBR-010)
国家科技基础性工作专项 (2013FY111200、2015FY110600)
*文中部分标本的整理和拍照由中国科学院海洋研究所张均龙博士完成, 谨致谢忱
Comparative study on several confused species of Nerita (Gastropoda, Cycloneritimorpha, Neritidae)
Received date: 2017-07-24
Request revised date: 2017-10-19
Online published: 2018-05-03
Supported by
National Natural Science Foundation of China (41406185)
Special Funds for the Young Scholars of Taxonomy of the Chinese Academy of Sciences (ZSBR-010)
Natural Science and Technology Basic Research Program of China (2013FY111200, 2015FY110600)
Copyright
蜑螺科 Neritidae 蜑螺属 Nerita 的一些种类形态近似, 形态鉴定上存在种类混淆、同物异名或错误鉴定等现象。作者在整理中国科学院南海海洋生物标本馆和中国科学院海洋生物标本馆历年来采集的蜑螺科标本时, 对4种隶属于蜑螺属的易混淆种进行了比较研究。通过对标本的反复对比, 分别找出了它们之间外部形态、地理分布以及生活习性方面的差异, 澄清了混淆, 确立了其分类地位: 1) 矮狮蜑螺Nerita chamaeleon Linnaeus, 1758和圆蜑螺Nerita histrio Linnaeus, 1758两者贝壳形态相近, 在我国海区分布重叠, 存在混淆以及错误鉴定的现象, 根据螺旋部以及壳面雕刻可将它们区分开, 即前者壳面螺肋光滑, 后者螺肋粗糙, 而前者螺旋部较后者高; 2) 锦蜑螺 Nerita polita Linnaeus, 1758和杂色蜑螺 Nerita litterata Gmelin, 1791两个种常被混淆在一起, 都鉴定为锦蜑螺, 前者在我国见于台湾、海南岛和西沙群岛, 后者在我国见于台湾、福建、广东、广西和西沙群岛, 其中杂色蜑螺此前在我国仅见于台湾, 本文的报道进一步完善了该种的地理分布信息。
陈志云 , 连喜平 , 谭烨辉 . 蜑螺属Nerita几个混淆种的比较研究(腹足纲, 珍珠蜑螺目, 蜑螺科)*[J]. 热带海洋学报, 2018 , 37(3) : 73 -79 . DOI: 10.11978/2017082
We deal with four confused species from the China seas. Nerita chamaeleon Linnaeus, 1758 and Nerita histrio Linnaeus, 1758 have similar shell characters and are often confused and misidentified as each other. The classification of Nerita polita Linnaeus, 1758 and Nerita litterata Gmelin, 1791 had been confused for quite a long time, and both were usually identified as Nerita polita. Our comparative study is conducted on the Nerita specimens deposited in the Marine Biodiversity Collections of South China Sea (SCSMBC, Guangzhou) and the Marine Biological Museum (MBM, Qingdao), Chinese Academy of Sciences. The taxonomic confusion of the four species is clarified on shell morphology, distribution and habitat; and species statuses of the two are confirmed.
Tab. 1 Measurements of Nerita chamaeleon Linnaeus, 1758表1 矮狮蜑螺标本测量数据 |
个体 | ||||||
---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | |
壳长/mm | 16.14 | 16.45 | 17.40 | 18.20 | 19.93 | 20.09 |
壳宽/mm | 17.27 | 16.41 | 17.63 | 18.02 | 20.26 | 20.15 |
Fig. 1 Nerita chamaeleon Linnaeus, 1758 and Nerita histrio Linnaeus, 1758. (a-c) Apertural, ventral and dorsal views of Nerita chamaeleon; (d) operculum of Nerita chamaeleon; (e-g) apertural, ventral and dorsal views of Nerita histrio; (h) operculum of Nerita histrio图1 矮狮蜑螺和圆蜑螺 |
Tab. 2 Measurements of Nerita histrio Linnaeus, 1758表2 圆蜑螺标本测量数据 |
个体 | ||||||
---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | |
壳长/mm | 14.17 | 14.24 | 15.79 | 16.39 | 16.96 | 20.08 |
壳宽/mm | 15.15 | 15.53 | 17.07 | 17.76 | 19.03 | 21.78 |
Tab. 3 Identification of Nerita chamaeleon and Nerita histrio表3 矮狮蜑螺和圆蜑螺主要鉴别特征 |
矮狮蜑螺 Nerita chamaeleon Linnaeus, 1758 | 圆蜑螺 Nerita histrio Linnaeus, 1758 | |
---|---|---|
螺旋部 | 短小, 但明显高出于体螺层 | 低小而平, 几乎与体螺层齐平 |
壳面 雕刻 | 螺肋较光滑, 生长纹极细 | 螺肋粗糙, 生长纹粗糙呈鳞片状 |
外唇 | 上方低于螺旋部 | 上方明显扩张,几乎与壳顶齐平 |
内唇 | 内缘小齿明显 | 内缘小齿细弱 |
Tab. 4 Measurements of Nerita polita Linnaeus, 1758表4 锦蜑螺标本测量数据 |
个体 | ||||||
---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | |
壳长/mm | 22.16 | 24.56 | 26.86 | 27.03 | 27.27 | 34.20 |
壳宽/mm | 26.05 | 29.23 | 30.95 | 31.23 | 31.46 | 38.11 |
Fig. 2 Nerita polita Linnaeus, 1758 and Nerita litterata Gmelin, 1791. (a-d) Apertural, ventral and dorsal view of Nerita polita; (e) operculum of Nerita polita; (f-h) apertural, ventral and dorsal view of Nerita litterata; (i) operculum of Nerita litterata图2 锦蜑螺和杂色蜑螺 |
Tab. 5 Measurements of Nerita litterata Gmelin, 1791表5 杂色蜑螺标本测量数据 |
个体 | ||||||
---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | |
壳长/mm | 11.08 | 13.57 | 14.87 | 17.52 | 19.86 | 21.00 |
壳宽/mm | 12.17 | 14.56 | 15.90 | 18.04 | 20.28 | 21.28 |
Tab. 6 Identification of Nerita polita and Nerita litterata表6 锦蜑螺和杂色蜑螺主要鉴别特征 |
锦蜑螺 Nerita polita Linnaeus, 1758 | 杂色蜑螺 Nerita litterata Gmelin, 1791 | ||
---|---|---|---|
贝壳 | 近球形, | 较前者小, 呈长卵圆形 | |
螺旋部 | 低平 | 较前者高 | |
壳面雕刻 | 生长纹明显, 无螺纹 | 生长纹和螺纹明显, | |
外唇 | 内缘具一列细弱的肋状齿 | 内缘肋状齿不明显 | |
内唇 | 内唇微凸, 饱满有光泽; 内缘中部具较弱的齿 | 内唇微凹, 无光泽; 内缘 中部具明显的齿, 齿间具沟 | |
分布 | 印度-太平洋区系 台湾、海南岛、西沙群岛 | 印度-西太平洋区系 台湾、福建、广东、广西、 海南、西沙群岛 | |
习性 | 白天可埋栖在砂质底内 | 无埋栖习性 |
The authors have declared that no competing interests exist.
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