- 著者
- Shunta Shibuya You Sakurai Hiroyuki Motomura
- 出版者
- The Japanese Society of Systematic Zoology
- 雑誌
- Species Diversity (ISSN:13421670)
- 巻号頁・発行日
- vol.27, no.1, pp.45-51, 2022-03-10 (Released:2022-03-10)
- 参考文献数
- 25
- 被引用文献数
- 2
Twenty-four specimens (184.6–243.6 mm in standard length) of Monotaxis Anonymous [Bennett], 1830, collected from the Ryukyu Islands, southern Japan, were identified as M. heterodon (Bleeker, 1854) (Perciformes: Lethrinidae). Although a widely distributed Indo-West Pacific species, all previous records from Japanese waters have been based solely on photographs, the present specimens therefore representing the first specimen-based records of M. heterodon from Japan. A detailed comparison between M. heterodon and its only congener, M. grandoculis (Forsskål, 1775), from which it has previously been distinguished primarily by scale rows below the lateral line and fresh or live coloration, revealed new diagnostic characters, most of which are applicable to preserved specimens. In addition to previously recognized characters, the two species can be distinguished by mid-dorsal snout profile in adults (concave vs. straight), snout length (excluding lips) [8.9–11.1 (mean 9.9) % of SL vs. 10.3–12.1 (11.2) % SL], spinous anal-fin base length [4.6–5.9 (5.0) % of SL vs. 3.9–4.9 (4.4) % SL], a distinct black blotch above the pupil (absent vs. present), a dark brown stripe across the post interorbital region in preserved specimens (present vs. absent), and preserved coloration of the pectoral-fin base inner surface (blackish brown vs. light brown).
- 著者
- Kazuo Hoshino You Sakurai Hiroyuki Motomura
- 出版者
- The Japanese Society of Systematic Zoology
- 雑誌
- Species Diversity (ISSN:13421670)
- 巻号頁・発行日
- vol.28, no.1, pp.123-131, 2023-04-26 (Released:2023-04-26)
- 参考文献数
- 41
Fifteen specimens (70.9–95.5 mm standard length) of the Indo-Pacific species Scorpaenodes corallinus Smith, 1957, previously recorded from Mozambique, Tanzania, Kenya, the Seychelles, Indonesia, Australia, the Hawaiian Islands, New Caledonia and French Polynesia, and recently collected from Okinawa Island (Okinawa Islands) and Yoron Island (Amami Islands), represent the first Japanese records of the species. Examination of a wide range of specimens indicated that the presence of coronal spines (formerly considered diagnostic of the species) was inconsistent. The new standard Japanese name “Ichigo-isokasago” is proposed for the species.
- 著者
- Ryuichi Nakagawa You Sakurai Hiroyuki Motomura
- 出版者
- The Japanese Society of Systematic Zoology
- 雑誌
- Species Diversity (ISSN:13421670)
- 巻号頁・発行日
- vol.27, no.1, pp.15-23, 2022-01-01 (Released:2022-01-01)
- 参考文献数
- 20
Seven specimens (149.0–221.2 mm standard length) of Pristipomoides amoenus (Snyder, 1911), previously known only from Okinawa-jima and Ishigaki-jima islands, southern Ryukyu Islands, Okinawa Prefecture, Japan, were collected from other regions of Japan (Amami-oshima island, Amami Islands, Kagoshima Prefecture), Taiwan (Dong-gang, Pingtung), the Philippines (Iloilo, Panay Island), and Fiji (Viti Levu Island), thereby representing the first records of the species from outside Okinawa Prefecture. The Amami-oshima and Fijian specimens also represent the northernmost and first Southern Hemisphere records, respectively, for the species. Comparison of these plus newly collected specimens from the southern Ryukyu Islands (herein described in detail) with the closely related species Pristipomoides argyrogrammicus (Valenciennes in Cuvier and Valenciennes, 1832) revealed the following hitherto unrecognized diagnostic color features of P. amoenus: a few small silvery-blue blotches present inside yellow saddles on dorsum; small silvery-blue blotches below trunk lateral line absent or indistinct; a distinct line (formed by small silvery-blue blotches) absent on lower caudal peduncle; a large silvery-blue blotch present on upper opercle, extending anteriorly beyond preopercular margin; a line formed by small silvery-blue blotches on upper caudal peduncle ending at upper caudal-fin base; a pair of lines formed by small silvery-blue blotches along dorsal-fin base (dorsal view); a larger pair of elliptical silvery-blue blotches on occipital region (all silvery-blue blotches retained as dark-brown blotches after preservation). Pristipomoides argyrogrammicus is newly recorded from the Tokara Islands, northern Ryukyu Islands, Japan.
- 著者
- Jumpei Nakamura You Sakurai Tetsuo Yoshino Hiroyuki Motomura
- 出版者
- The Japanese Society of Systematic Zoology
- 雑誌
- Species Diversity (ISSN:13421670)
- 巻号頁・発行日
- vol.25, no.2, pp.129-133, 2020-05-15 (Released:2020-05-15)
- 参考文献数
- 25
During the past three decades, ten specimens (174.1–235.1 mm standard length) of the Bluespotted Hind Cephalopholis cyanostigma (Valenciennes in Cuvier and Valenciennes, 1828), distributed in the eastern Indian and western Pacific oceans, have been collected from the southern Ryukyu Islands, Japan, although the species has been formally recorded from Japanese waters only on the basis of a single photograph, with the northernmost specimen-based record being Taiwan. The Ryukyu Island specimens, described here in detail, represent the first specimen-based records of C. cyanostigma from Japan, in addition to the northernmost record of the species. The new standard Japanese name “Samidare-hata” is proposed for the species.