Crustaceana 89 (10) 1229-1232

NOTES AND NEWS

CRIMSON SEABREAM EVYNNIS TUMIFRONS (TEMMINCK & SCHLEGEL, 1843) (, ), A NEW HOST FOR CERATOTHOA VERRUCOSA (SCHIOEDTE & MEINERT, 1883) (ISOPODA, CYMOTHOIDAE)

BY

KAZUYA NAGASAWA1,3) and SUSUMU ISOZAKI2) 1) Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8528, Japan 2) 1-1810 Ematsu, Nakagawa, Nagoya, Aichi 454-0954, Japan

Ceratothoa verrucosa (Schioedte & Meinert, 1883) is a parasite that is found in the buccal cavity of sparid fishes (, Perciformes), including the red seabream, major (Temminck & Schlegel, 1843) (Saito et al., 2000). This isopod has been reported from various localities in Japan as Rhexana verrucosa (cf. Thielemann, 1910; Hiraiwa, 1934 (the generic name was misspelled as “Rexana”); Sanada, 1941), Rhexanella verrucosa (cf. Nierstrasz, 1915; Shiino, 1951; Anonymous, 1966; Trilles, 1972; Nunomura, 1981, 1985) and more recently Ceratothoa verrucosa (cf. Yamauchi & Nunomura, 2010; Hadfield et al., 2016). Hadfield et al. (2016) redescribed Ceratothoa verrucosa from the type material (held at the Naturalis Biodiversity Center, Leiden), Yamaguchi & Baba (1993) having earlier designated a lectotype and paralectotype for the species. Hadfield et al. (2016) excluded one record from Indonesian waters (Nierstrasz, 1931) as ‘identity uncertain’, leaving the known distribution as “Japan and surrounding islands”. The species occurs rarely on P. m a j o r cultured in Japanese coastal waters (Hatai, 1989, 2006). Yamauchi et al. (2004) briefly reviewed the biology of the species. Ceratothoa verrucosa has been reported to parasitize Pagrus major (cf. Hiraiwa, 1934; Sanada, 1941; Shiino, 1951 (these three authors reported the host as Pagrosomus major); Anonymous, 1966; Nunomura, 1981, 1985; Yamauchi & Nunomura, 2010; Hadfield et al., 2016) or unidentified sparids (Shiino, 1965, 1979; Inaba, 1981; Nunomura, 1995). Only Nunomura (1981) has recorded two host species for C. verrucosa from the southern Sea of Japan off Sado Island

3) Corresponding author; e-mail: [email protected] © Koninklijke Brill NV, Leiden, 2016 DOI 10.1163/15685403-00003586 1230 NOTES AND NEWS

Fig. 1. Ceratothoa verrucosa (Schioedte & Meinert, 1883), NSMT-Cr 24617. A, an ovigerous female (F) and a male (M) of C. verrucosa attached to the roof and lateral wall of the buccal cavity of Pagrus major (Temminck & Schlegel, 1843), respectively, fresh specimens; B, an ovigerous female (F) and amale(M)ofC. verrucosa, dorsal view, alcohol-preserved specimens. Scale bars: 10 mm in A-B. This figure is published in colour in the online edition of this journal, which can be accessed via http://booksandjournals.brillonline.com/content/journals/15685403. each as P. m a j o r and “porgy”: the latter English name is used for unidentified Sparidae, but implicitly not P. m a j o r . Recently, we collected C. verrucosa from the crimson seabream, Evynnis tumifrons (Temminck & Schlegel, 1843) (Perciformes, Sparidae), caught in the coastal Pacific waters of central Japan. This collection represents a new host record for C. verrucosa. Two individuals of E. tumifrons (ca. 25 cm in total length) were caught at 20 m deep in Kowaura Bay off Minami-Ise, Mie Prefecture, Japan, on 11 June 2016, and one of them had an ovigerous female and a male of C. verrucosa (fig. 1B) in the buccal cavity (fig. 1A). These isopods are deposited in the Crustacea collection of the National Museum of Nature and Science, Tsukuba, Ibaraki Prefecture (NSMT- Cr 24617). The scientific names of fishes used in this paper follow Iwatsuki et al. (2007) and Nakabo (2013). The female and male were attached ventrally to the roof and lateral wall of the buccal cavity, respectively. The female measures 42.2 mm long × 19.8 mm wide, while the male is much smaller, 22.3 mm long × 9.4 mm wide. The morphology of the specimens, especially of the female, corresponds to that of C. verrucosa reported by Hiraiwa (1934) and Shiino (1951, 1965, 1979), and the redescription of the species made by Hadfield et al. (2016) using the type specimens. Ceratothoa verrucosa has often been reported from P. m a j o r , and it is thus evident that this fish serves as a frequent host for the isopod. The present specimens