日本におけるAtorella vanhoeffeni(刺胞動物門,鉢虫綱,カンムリクラゲ目)の広範囲な地理的分布

Medusae of a rare, small scyphomedusa, Atorella vanhoeffeni Bigelow, 1909 (Cnidaria, Scyphozoa, Coronatae), were collected and/or photographed at three sites in Japan: Notojima, Ishikawa Prefecture, in the Sea of Japan; Osezaki, Shizuoka Prefecture, on the Pacific coast; and Yonaguni Island, Okinawa Prefecture, in the East China Sea. In Japanese waters this species has been previously reported only from Kakeroma Island, Kagoshima Prefecture. The detailed morphology is described based on a medusa from Yonaguni Island

GREEN FLUORESCENCE PROTEIN (GFP) DETECTED IN A MEDUSA OF ATORELLA VANHOEFFENI (CNIDARIA, SCYPHOZOA, CORONATAE) IN JAPAN

Green fluorescence protein (GFP) is detected in a coronate scyphomedusa of Atorella vanhoeffeni collected from Osezaki, Shizuoka Prefecture, Japan

First Record of Pandeid Jellyfish, Eutiara decorata Berberian, Michenet and Goy, 2021 (Hydrozoa, Anthoathecata, Pandeidae), from Japan

Two specimens of pandeid species, Eutiara decorata Berberian, Michenet and Goy, 2021 were collected from Kumejima Island in Okinawa Prefecture, Japan. These specimens with a small white apical process were not yet fully-grown adults. A hyperiid amphipod, Brachyscelus crusculum, was attached to Eutiara decorata in situ. Eutiara decorata has only been reported in Tahiti Island, French Polynesia, in 2021. This is the first record from Japan and the second record of occurrence since its original description

Wide geographical distribution of Atorella vanhoeffeni (Cnidaria, Scyphozoa, Coronatae) in Japan

Medusae of a rare, small scyphomedusa, Atorella vanhoeffeni Bigelow, 1909 (Cnidaria, Scyphozoa, Coronatae), were collected and/or photographed at three sites in Japan: Notojima, Ishikawa Prefecture, in the Sea of Japan; Osezaki, Shizuoka Prefecture, on the Pacific coast; and Yonaguni Island, Okinawa Prefecture, in the East China Sea. In Japanese waters this species has been previously reported only from Kakeroma Island, Kagoshima Prefecture. The detailed morphology is described based on a medusa from Yonaguni Island

Olindias deigo sp. nov., a new species (Hydrozoa, Trachylinae, Limnomedusae) from the Ryukyu Archipelago, southern Japan

A new hydromedusa belonging to the order Limnomedusae is reported from the Ryukyu Archipelago, southern Japan. Olindias deigo sp. nov. can be distinguished from other Olindiidae species by the number and color of tentacles. Mature medusae of O. deigo sp. nov. were collected to observe the life history, including polyp (hydroid) and medusa formation. A comparative table of the primary diagnostic characters of the genus is provided

Olindias deigo sp. nov., a new species (Hydrozoa, Trachylinae, Limnomedusae) from the Ryukyu Archipelago, southern Japan

A new hydromedusa belonging to the order Limnomedusae is reported from the Ryukyu Archipelago, southern Japan. Olindias deigo sp. nov. can be distinguished from other Olindiidae species by the number and color of tentacles. Mature medusae of O. deigo sp. nov. were collected to observe the life history, including polyp (hydroid) and medusa formation. A comparative table of the primary diagnostic characters of the genus is provided

Thor marguitae Bruce 1978

<i>Thor marguitae</i> Bruce, 1978 <p>[New Japanese name: Daruma-hime-sango-moebi] Figs. 5A, 6, 7</p> <p> <i>Thor marguitae</i> Bruce, 1978: 159, figs. 1–6 (type locality: Heron Island, Capricorn Islands, Queensland, Australia; 1983: 9 (key).— Chace 1997: 99 (key).— De Grave & Fransen 2011: 434.</p> <p> <b>Material examined</b>. Off Ginowan, Okinawa Island, 16 m, associated with fungiid coral, 22 June 2011, coll. R. Minemizu, SCUBA diving, 1 ovigerous female (cl 2.7 mm), CBM-ZC 11889.</p> <p> <b>Description</b>. See Bruce (1978).</p> <p> <b>Colouration in life</b>. Carapace mottled milky white, pleon semitransparent with faint white markings, caudal fan (telson + uropods) with proximal and distal white bands, intermediate part speckled with brown. Appendages also generally milky white. Ultimate segment of third maxilliped proximally with grayish brown ring. Propodi of third to fifth pereopods each with grayish brown bands distally and proximally, meri also with grayish brown markings.</p> <p> <b>Distribution</b>. Previously known only from the type locality in Queensland, Australia. The discovery of the present specimen from Okinawa Island greatly extends the known geographical range of the species and suggests a wide distribution in the tropical and subtropical western Pacific.</p> <p> <b>Habitat</b>. The present specimen was found under the solitary fungiid coral, <i>Fungia repanda</i> Dana, 1846.</p> <p> <b>Remarks</b>. The present ovigerous female specimen agrees generally with the original description of <i>Thor marguitae</i> by Bruce (1978), particularly in the following characteristics: body moderately robust for genus (Fig. 6 A); rostrum deep, subtruncate terminally, ventral margin sinuous (Fig. 6 C); carapace without supraorbital or pterygostomial teeth (Fig. 6 B); telson bearing three pairs of dorsolateral spines, posterior margin convex, medially not acute, armed with two pairs of spines and one mesial pair of plumose spine (Fig. 6 D); stylocerite of antennular peduncle with small erect tooth near proximal end (Fig. 6 C); third maxilliped and pereopods relatively slender for genus (Fig. 7 A–H); chela of first pereopod tapered and clearly compressed (Fig. 7 B, C); dactyli of third to fifth pereopods relatively slender with penultimate unguis weaker than ultimate unguis (Fig. 7 F). Nevertheless, minor differences are seen in the extension of the distolateral tooth of the antennal scale and the number of the carpal articles of the second pereopod. Bruce (1978) specifically stated that the distolateral tooth of the antennal scale slightly overreaches the distal margin of the lamella, but in the present specimen, the distolateral tooth falls slightly short of the distal margin of the lamella (Fig. 6 C). In his identification key to the species of <i>Thor</i>, Chace (1997) used the extension of the distolateral tooth of the antennal scale in differentiating <i>T. amboinensis</i> and <i>T. marguitae</i>, but this character might not be so reliable. The carpal articles number is six in the type series, but there are only five articles in the present specimen (Fig. 7 D). In <i>Thor</i>, carpal articles of the second pereopod are normally six, but Kemp (1914) recorded a single specimen of <i>T. paschalis</i> having seven carpal articles. The present specimen seems to represent a new example of aberrant variation of the carpal division of the second pereopod in the genus. Furthermore, the living coloration of the present specimen seems to be somewhat different from the description given by Bruce (1983), particularly in the lack of red speckles on the pleura of the pleon. The apparent lack of red speckles in the present specimen may be due to contraction of chromatophores.</p> <p> Bruce (1978) reported on the variation in the number of meral spines of the third to fifth pereopods in <i>T. marguitae</i>: two to five in the third, one to four in the fourth, and one (rarely zero) in the fifth. In the present specimen, the numbers of the meral spines are two-one-one, falling within the reported range of variation.</p> <p> Association with the fungiid coral was already reported by Bruce (1978). As noted above, the present specimen was found in association with <i>Fungia repanda</i>.</p> <p> With the discovery of the two species in the present study, five species of <i>Thor</i> are now known from Japanese waters. Future study may eventually reveal the presence of the other three Indo-West Pacific species (<i>T. hainanensis</i>, <i>T. intermedius</i>, and <i>T. spinipes</i>) in the Japanese Archipelago.</p> <p> In addition to the 15 formally named species of <i>Thor</i>, Miyake & Hayashi (1966) reported on an unidentified specimen (<i>Thor</i> sp.) on the basis of a tiny single female specimen from Amami-oshima Island, the Ryukyu Archipelago. The specific status of this unidentified specimen has not been settled. We have found that Miyake & Hayashi’s (1967) specimen is generally similar to <i>T. marguitae</i> in many diagnostic aspects cited above, in particular, the characteristic shape of the chela of the first pereopod (Miyake & Hayashi 1966: Fig. 8d). The rostrum of the specimen used by Miyake & Hayashi differs from that of typical <i>T. marguitae</i> in having an acute tip and a single ventral tooth extending as far as the rostral tip. However, Bruce (1973) reported on a wide range of variation in the shape and armature of the rostrum in <i>T. marguitae</i>. It is likely that Miyake & Hayashi’s (1966) specimen actually represent young <i>T. marguitae</i>.</p>Published as part of <i>Komai, Tomoyuki, Okuno, Junji & Minemizu, Ryo, 2015, New records of two species of the coral reef shrimp genus Thor Kingsley, 1878 (Crustacea: Decapoda: Thoridae) from the Ryukyu Islands, Japan, pp. 399-412 in Zootaxa 4013 (3)</i> on pages 406-407, DOI: 10.11646/zootaxa.4013.3.4, <a href="http://zenodo.org/record/241262">http://zenodo.org/record/241262</a&gt