Three new species of genus Cryptonatica (Gastropoda, Naticidae) from Huanghai Sea Cold Water Mass
- PDF / 345,813 Bytes
- 6 Pages / 595 x 842 pts (A4) Page_size
- 92 Downloads / 171 Views
Three new species of Genus Cryptonatica (Gastropoda, Naticidae) from Huanghai Sea Cold Water Mass ZHANG Suping1∗ , WEI Peng1 1
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Received 11 February 2009; accepted 12 May 2009 c The Chinese Society of Oceanography and Springer-Verlag Berlin Heidelberg 2010
Abstract This report based on the results of investigations conducted in June 2007 and July 2008, respectively, on the benthic community structure and characteristic diversity of the Huanghai Sea (Yellow Sea) Cold Water Mass, as well as that in July 1959 during the national oceanic survey. The Naticidae specimens collected from Cold Water Mass in middle and northern Huanghai Sea were studied through morphological classification and the internal anatomy on radula. Three new species of Naticidae, i.e., Cryptonatica purpurfunda sp. nov., Cryptonatica sphaera sp. nov., and Cryptonatica striatica sp. nov. were identified. The morphological characteristics of the new species are described, and the similarties and differences between the new species and similar species are compared and discussed. Key words: Mollusca, Gastropoda, Naticidae, Cryptonatica, new species, Huanghai Sea Cold Water Mass
1 Introduction The Naticidae are worldwide distributed species, from cold to tropical waters, while some of them are only distributed in cold and temperate waters. The Huanghai Sea, as a semi-enclosed shallow sea, located between the northern China Mainland and the Korean Peninsula, only connected to the East China Sea in the south. The average water depth of the Huanghai Sea is 44 m, and due to the unique environment, the Cold Water Mass was formed in Huanghai Sea. Even the surface water temperature reached 25 ◦ C in summer, however, due to the lack of adequate exchange, the bottom water is still maintained at a temperature as low as only 6–8 ◦ C. Generally, the temperature of Huanghai Sea Cold Water Mass keeps at a range of 5– 11 ◦ C year round. This is the most prominent hydrological characteristic of the Huanghai Sea. As a result of this special geographical hydrological environment, there is a number of cold-temperate water species from the North Pacific Ocean inhabit here. Golikov and Sirenko (1988) recorded, some Naticidae species are only distributed in cold and temperate waters. For example, genus Cryptonatica Dall 1892 is distributed mainly in cold and temperate waters of the northern Hemisphere. Its species settle, for the most part, on
sandy or muddy-sand substrates from the lower horizon of the littoral zone down to the bathyal zone. While Cyptonatica andoi (Nomura, 1935), Cryptonaitca huanghaiensis Zhang, 2008, Cryptonaitca hirasei (Pilsbry, 1905) and some other species have been found currently in the northern Huanghai Sea. Until now, these species only were found in Huanghai Sea Cold Water Mass, and have not been reported in other sea waters of China. Moreover, during the marine biological surveys in the Huanghai Sea in the past years, different species of Cryptonaitca were collected in th
Data Loading...
