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Mysidacea fauna of the East China Sea
Wang, S.; Liu, R. (1997). Mysidacea fauna of the East China Sea. Stud. Mar. Sin. 38: 191-222
In: Studia Marina Sinica = Haiyang Kexue Jikan. Kexue Chubanshe: Beíjing. ISSN 0438-380X
Peer reviewed article  

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  • Wang, S.
  • Liu, R.

    48 species of Mysidacean Crustacea have been found in the western part of the East China Sea and are reported here. Among them 7, species, viz. Paralophogaster glaber Hansen, Lophogaster pacificus Fage, Gnathophausia ingens (Dohrn), G. zoea Willemoes-Suham, Eucopia australis Dana, Boreomysis rostrata Illig, Lophogaster sp. , are deep water species with wide distribution range. Their zoogeographical characteristics are different. Paralophogaster glaber Hansen has also been found in the Atlantic besides the Pacific and Indian waters. Zoogeographical analysis are made here with the 41 shelf species. The following 17 species are widely distributed throughout the tropical Indo-West Pacific or the West Pacific Warm water Region: 1. Siriella aequiremis Hansen; 2. S. gracilis Dana; 3. Siriella thompsonii (H. Milne-Edwards); 4. Hemisiriella pulchra Hansen; 5. Rhopalophthalmus longipes Ii; 6. Anchialina typica Kroyer; 7. Pseudanchialina pusilla (G. O. Sars); 8. Gastrosaccus bengalensis Hansen; 9. Gastrosaccus dunkeri Zimmer; 10. Pleurerythrops inscita Ii; 11. Hypererythrops spinifera (Hansen); 12. Erythrops minuta Hansen; 13. Promysis orientalis Dana; 14. Mysidopsis indica ( W. M. Tattersall ) ; 15. Pseudomysidetes cochinensis Panampunnayil; 16. Acanthomysis quadrispinosa Nouvel; 17. Anisomysis bipartoculata Ii. Among these species, Siriella aequiremis has been found also from the Atlantic coast of America, while Anchialina typica and Siriella thompsonii distributed also to the Atlantic and Pacific coasts of America. Siriella gracilis and Pleurerythrops inscita Ii distributed widely in the West Pacific warm water region from Indo-Malaysian to Sino-Japanese waters. Beside these, 8 warm water species, viz. Siriella sinensis Ii , S. trispina Ii, Rhopalophthalmus orientalis O.S. Tattersall, Iiella hibii (Ii) , Acanthomysis aokii Ii, A. laticauda Liu et Wang, A. leptura Liu et Wang and A. crassispinosa Liu et Wang, are also commonly found in eastern and southern China and Japan or only in Chinese seas. Thus, altogether 25 warm water species have been enumerated. High endemism seems to be main characteristics of the mysid fauna of shallow seas around China and Japan ,as high percentage of endemic species have been found. Among the 23 species found only in Sino-Japanese or in Chinese water, Acanthomysis aokii and A. brevirostris have been found only in the East China Sea ,Iiella pelagicus, Acanthomysis hwanghaiensis and A. koreana were recorded only form the Yellow and East China Sea, and Acanthomysis crassispinosa, A. laticauda and A. leptura were found only in the East and South China Seas, these 8 species may be considered as endemic elements of China seas. Of another 7 species, 1 (Hyperythrops zimmeri) seems to be endemic to the East China Sea-Japan area, 4 (Acanthomysis fuginagai, A. okayamaensis, Iiella kojimaensis, Parastilomysis paradoxa) are endemic to the Yellow Sea-East China Sea-Japan area, and 2 species (Iiella hibii, Rhopalophthalmus orientalis) endemic to the East and South China Sea-Japanese water. Among the 8 species common to Chinese (Yellow Sea, East and South China Seas) and Japanese seas, 5 temperate species, N. awatschensis (Brandt), N. japonica Nakazawa, Archaeomysis kokuboi Ii, Holmesiella affinis Ii and (perhaps) Acanthomysis longirostris Ii, are widely and abundantly distributed in shelf waters from northern Japan down to whole China coast, even to the northern South China Sea, while the 3 open sea species, Siriella sinensis Ii and S. trispina Ii , and Iiella formosensis (Ii), distributed northward to northern Japan in the east and to Yellow Sea in the west. The 12 species of Acanthomysis of the East China Sea are found to be limited to shallow coastal water area where the salinity and temperature have a wide range of fluctuation and high species diversity of the mysid fauna is characterized. Among them Acanthomysis quadrispinosa Nouvel has a wide distribution throughout the Indo-West Pacific Region even to African coast, the other 11 are limited to shallow waters around China and Japan (4 species) or only along Chinese coast (7 species: 2 in East China Sea, 2 in Yellow and East China Sea, and 3 in East and South China Sea). As other groups of Crustacea, the mysidacean fauna of the East China Sea is closely related to that of the South China Sea and Japanese waters, 35 species are found to be common to the East and northern South China Sea ( 7 2. 9%) , 27 species are common to the East China Sea and Japanese waters (56. 3%), and 20 (41. 6% ) species are common to the East and South China Sea and Japanese waters. The distribution pattern of the Chinese and Japanese mysidacean fauna are closely related to the oceanographic conditions, particularly the current system - the Kuroshio warm current, its branches and the Chinese coastal current systems. It has been found that the specific name Acanthomysis sinensis Ii, 1964, had been preoccupied by Shen in 1955, as Acanthomysis longirostris var. sinensis Shen. But judging from Shen's description and figures, his new "variety" A. longirostris var. sinensis is based on young individuals of A. longirostris Ii, therefore, a new name should be suggested to substitute the preoccupied name A. sinensis Ii, 1964, according to the regulations of International Zoological Nomenclature, and Acanthomysis brevirostris Wang et Liu, nom. nov. is recommended here.

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