Journal of Tropical Oceanography >
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
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.
CHEN Zhiyun , LIAN Xiping , TAN Yehui . Comparative study on several confused species of Nerita (Gastropoda, Cycloneritimorpha, Neritidae)[J]. Journal of Tropical Oceanography, 2018 , 37(3) : 73 -79 . DOI: 10.11978/2017082
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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