Crustacean Research
Online ISSN : 2189-5317
Print ISSN : 0287-3478
ISSN-L : 0287-3478
原著論文
Tachaea chinensis (Isopoda: Corallanidae), an ectoparasite of freshwater shrimps and prawns, from western Japan, with a list of its known collection localities and hosts
Kazuya Nagasawa Tadashi ImaiHidetoshi Saito
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ジャーナル フリー

2018 年 47 巻 p. 73-88

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The corallanid isopod Tachaea chinensis Thielemann, 1910 is a parasite attached on the carapace of freshwater shrimps and prawns. The isopod is reported from Palaemon paucidens De Haan, 1884 (Palaemonidae) at two localities in Kagawa Prefecture (Shikoku) and two localities in Shimane Prefecture (western Honshu), and from Neocaridina sp. (Atyidae) at one locality in Shimane Prefecture, Japan. This represents the first record of T. chinensis from Shikoku. The species is briefly described and illustrated based on non-ovigerous females. Prevalence of T. chinensis in populations of P. paucidens and Neocaridina sp. ranged from 10.7–57.1%, and the intensity of infestation was almost constantly one, which indicates its intra-specific competition on the host carapace. Palaemon paucidens is considered as a preferred host of T. chinensis in Honshu and Shikoku, Japan. Based on the literature published between 1910 and 2018 including this paper, T. chinensis has been reported from 14 nominal and some unidentified species of shrimps and prawns belonging to three atyid genera (Caridina, Neocaridina, and Paratya), two palaemonid genera (Macrobrachium and Palaemon), and one penaeid genus (Penaeus), ranging from temperate (Honshu, Shikoku, and Kyushu in Japan, and central-eastern China) through subtropical (Okinawa in Japan, and Hong Kong in southeastern China) to tropical (Hainan in southeastern China, Vietnam, Thailand, and Malaysia) regions in East Asia.

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© 2018 The Carcinological Society of Japan
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