Plankton Biol. Ecol. 49 (1): 38-43, 2002 plankton biology & ecology C The Plankton Society of Japan 2002 Note Supplementary information on the taxonomy and distribution of six species of Anisomysis (Crustacea: Mysidacea: Mysidae) Koukj Fukuoka1'4, Yukio Hanamura2 & Masaaki Murano3 ' Department ofAquatic Biosciences, Tokyo University ofFisheries, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan 2 National Research Institute ofFisheries and Environment of Inland Sea, Ohno-cho, Saeki-gun, Hiroshima 739-0452, Japan s Insitute of Environmental Ecology, METOCEAN Environment Inc., Riemon 1334-5, Ooigawa-cho, Shida-gun, Shizuoka 421-0212, Japan 4 Present address: Ishigaki Tropical Station, Seikai National Fisheries Research Institute, 148-446 Fukai-Ohta, Ishigaki-shi, Okinawa 907-0451, Japan Received 7 May 2001; accepted 8 August 2001 The genus Anisomysis Hansen, 1910, is widely and abun rano, 1977, p. 47 (list).—Muller, 1993, p. 201 (list).—Fukuoka dantly distributed in the Indo-West Pacific region and includes 6 Murano, in press. 40 species and two subspecies. They may have an important role in coastal marine ecosystems owing to their abundance. Materials This paper provides supplementary information on the taxon 1) Ogasawara Islands. 1 male (5.5 mm), Futami Harbor. 57 omy and distribution of six of the lesser known species of Ani males (3.6-6.0 mm), 6 immature males (3.2-3.6 mm), 89 fe somysis. males (3.7-5.8 mm) and 11 immature females (3.2—4.0 mm), Body length was measured from the tip of the rostrum to the Stn OS1. 8 males (4.0-4.8 mm), 6 females (4.5-5.0 mm) and 3 distal end of the telson excluding spines. Data on the speci immature females (4.0-4.2 mm), Stn OS2. 1 male (4.7 mm), mens collected from the Ogasawara Islands is summarized in Stn OS3. 2 males (5.4 and 5.9 mm) and 2 females (5.3 and 5.7 Table 1. mm), Stn OS6. 1 male (5.8 mm) and 2 females (4.5 and 5.2 mm), Stn OS7. 38 males (4.3-5.0 mm) and 15 females (3.8- 5.0 mm), Stn OS9. 6 males (4.0-5.0 mm) and 4 females (4.2- Anisomysis akajimaensis Murano, 1990 5.3 mm), Stn OS 10. 7 males (3.7-5.8 mm), 7 females (4.0-4.4 Anisomysis akajimaensis Murano, 1990, p. 207-209, Fig. mm) and 6 immature females (3.3-3.8 mm), Stn OS11. 1 male 15.—Muller, 1993, p. 201 (list). (4.5mm) and 1 female (4.0mm), Stn OS12. 6 males (3.8-5.6 mm), 7 immature males (1.8-2.6 mm), 4 females (3.7-4.0 Materials mm), 4 immature females (3.4-3.7 mm) and 20 juveniles (1.8- Ogasawara Islands, southern Japan. Abundant males (adult: 2.9mm), Stn LI. 3 males (3.8-5.0mm), 1 female (5.6mm) 4.1-4.4 mm) and females (adult: 4.0-4.3 mm), Nagasaki. 1 and 1 immature female (3.0mm), Stn L2. 1 male (5.6 mm), Stn male (4.0 mm) and 1 female (4.5 mm), Takinoura. L8. 1 male (5.3 mm), 8 females (4.7-5.7 mm), 6 immature fe males (4.0-4.4 mm) and 8 juveniles (1.3-2.5 mm), Stn L10. 4 Geographical distribution males (4.0-4.2 mm) and 2 females (4.6 and 5.8mm), Stn LI 1. Anisomysis akajimaensis was originally described from 7 males (3.7-5.4 mm) and 6 females (4.2-5.8 mm), Stn L12. 3 Aka-jima Island, Okinawa (Murano 1990). The present occur males (4.4-5.8 mm), Stn L13. 1 male (5.0 mm), Stn L14. 2 fe rence from the Ogasawara Islands is the second record. males (4.3 and 5.0 mm), Stn CH10. 45 males (4.7-6.5 mm) and 32 females (4.5-6.5 mm), 27°08'N 142°12'E. 2) Ishigaki Island, Ryukyu Islands, southwestern Japan. 1 Anisomysis bifurcata Tattersall, immature female (3.0 mm), Urasoko Bay, hand net, 4 m, rock 1912 (Fig. 1A-F) and coral, 10 June 1999, coll. K. Fukuoka. Anisomysis bifurcata Tattersall, 1912, p. 126-127, pi. 7, 3) Panay Island, Philippines. 1 female (5.4 mm) and 1 im Figs 1-6.—Gordan, 1957, p. 340 (list).—Mauchline & Mu- mature female (4.1 mm), 11°45'N 121°50'E, surface tow with plankton net, 26 Apr. 1979, provided by Southeast Asian Fish Corresponding author: Kouki Fukuoka; e-mail, [email protected] eries Development Center. Supplementary information on Anisomysis 39 Table 1. Collection data on the specimens from the Ogasawara Islands. Locality or position Date Method Depth Miyanohama, Chichi-jima Is. 16 June 1995 Hand net during skin diving (coll. K. Fukuoka) 0.5-3 m Futami Harbor, Chichi-jima Is. 16 June 1995 Towing net under a light at night (coll. K. Fukuoka) Surface Oki Harbor, Haha-jima Is. 17 June 1995 Towing net under a light at night (coll. K. Fukuoka) Surface Higashi Harbor, Haha-jima Is. 18 June 1995 Hand net during skin diving (coll. K. Fukuoka) 1-5 m Kopepekaigan, Chichi-jima Is. 19 June 1995 Hand net during skin diving (coll. K. Fukuoka) 1-2 m Ougiura, Chichi-jima Is. 20 June 1995 Hand net during skin diving (coll. K. Fukuoka) 1-5 m Takinoura, Ani-jima Is. 20 June 1995 Hand net during SCUBA diving (coll. T. Ishimaru) 15 m Nagasaki, Chichi-jima Is. 20 June 1995 Hand net during SCUBA diving (coll. T. Ishimaru) 15-20 m Kita Harbor, Haha-jima Is. 19 Oct. 1998 Hand net during skin diving (coll. K. Fukuoka) 0.5-1 m Stn OS1 (26°41.24'N 142°09.47'E) 18 June 1995 Bottom net (TR/V Seiyo-Maru) 55-60 m Stn OS2(26°42.02'N 142°10.95'E) 18 June 1995 Bottom net (TR/V Seiyo-Maru) 162 m Stn OS3 (26°43.68'N 142°12.05'E) 18 June 1995 Bottom net (TR/V Seiyo-Maru) 192-200 m Stn OS6(26°52.75'N 142°18.60'E) 18 June 1995 Bottom net (TR/V Seiyo-Maru) 1040-1124 m Stn OS7(26°56.01'N 142°17.36'E) 19 June 1995 Bottom net (TR/V Seiyo-Maru) 1192-1327 m StnOS9(27°00.22'N 142°14.10'E) 19 June 1995 Bottom net (TR/V Seiyo-Maru) 171 -203 m Stn OS10(27°01.17'N 142°13.05'E) 19 June 1995 Bottom net (TR/V Seiyo-Maru) 139-124 m Stn OS11 (27°01.74'N 142°12.48'E) 19 June 1995 Bottom net (TR/V Seiyo-Maru) 95-99 m StnOS12(27°01.80'N 142°12.22'E) 19 June 1995 Bottom net (TR/V Seiyo-Maru) 51 -68 m Stn L1 (Higashi Harbor, Haha-jima Is.) 18 June 1995 Larva net at night (TR/V Seiyo-Maru) Surface StnL2(26°41.5l'N 142°1O.O8'E) 18 June 1995 Larva net at night (TR/V Seiyo-Maru) Surface Stn L8(26°52.86'N 142°17.83'E) 19 June 1995 Larva net at night (TR/V Seiyo-Maru) Surface Stn L10(27°00.12'N 142°14.36'E) 19 June 1995 Larva net at night (TR/V Seiyo-Maru) Surface Stn LI 1 (27°01.10'N 142°13.39'E) 19 June 1995 Larva net at night (TR/V Seiyo-Maru) Surface Stn L12(27°O1.46'N 142°12.12'E) 19 June 1995 Larva net at night (TR/V Seiyo-Maru) Surface StnLl3(27°01.73'N 142°12.20'E) 19 June 1995 Larva net at night (TR/V Seiyo-Maru) Surface StnL14(27°01.62'N 142°11.90'E) 19 June 1995 Larva net at night (TR/V Seiyo-Maru) Surface StnCH10(27°00.28'N 142°10.40'E) 20 Oct. 1998 Bottom net (TR/V Shinyo-Maru) 123-125 m 27°08'N 142°12'E 14 June 1999 Towing net under a light at night (coll. K. Nishikiori) Surface 4) Christmas Island, Western Australia. Abundant males and (NH) No. 1946.11.26.65) on loan from the Natural History females (adult: 4.5-5 mm), WAM-23618 (Western Australian Museum, London. In this specimen, the presence in the ventral Museum), Flying Fish Cove, from the stomach of a whale statocyst region of the blunt process was confirmed but it was shark {Rhincodon typus Smith, 1828), 12 Jan. 1996, coll. B. neither pointed at the apex nor articulated at the base. All the Norman. present specimens also carried a blunt process such as that of the type specimen of A. bifurcata (Fig. ID). Thus, the present Remarks specimens are identified as A. bifurcata. As a result, A. spinata Anisomysis bifitrcata Tattersall, 1912, was described based is distinguished from A. bifurcata by only a slight difference in on specimens collected from the Chagos Islands and Farquhar the uropodal endopod. Reexamination of the validity of A. Island, Indian Ocean. This species is closely allied to Anisomy spinata may be needed. sis spinata Panampunnayil, 1993 described from near the Kalpeni Atoll, the Lakshadweep archipelago, India. Panam Ecological note punnayil (1993) indicated differences between these two Tattersall (1912) obtained this species from 274.5 m depth species in the rostrum, antennal scale, fourth pleopod of males, to the north of the Chagos Islands and from the surface near uropodal endopod, telson, and body length.