著者

Shinichi Tomiyama Atsushi Fukui

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.26, no.2, pp.187-190, 2021-08-06 (Released:2021-08-06)

参考文献数

9

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A single specimen of Bassozetus mozambiquensis Tomiyama, Takami, and Fukui, 2016, collected off southern Brazil in the western South Atlantic and held in the University of Hamburg ichthyological collection, was re-examined. Because the species was previously known only from the western Indian Ocean, solely on the basis of the holotype, the present specimen represents not only the first Atlantic record of the species, but also a ca. 8300 km westward extension of the distributional range. A detailed description of the Atlantic specimen and an updated diagnosis of the species are provided.

著者

Kenji Matsuda Yoh Ihara Takafumi Nakano

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.145-152, 2020-08-07 (Released:2020-08-07)

参考文献数

40

被引用文献数

4

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A new spider species, Cybaeus daimonji, from Kyoto, western-central Honshu, Japan is described based on both sexes. The shape of epigyne indicates that this new species is close to C. communis Yaginuma, 1972, C. kirigaminensis Komatsu, 1963, C. maculosus Yaginuma, 1972 and C. shinkaii (Komatsu, 1970), which are distributed in eastern to central Honshu. Nuclear internal transcribed spacer 1, 28S ribosomal RNA and histone H3 as well as mitochondrial cytochrome c oxidase subunit I, 12S ribosomal RNA and 16S ribosomal RNA sequences of the new species are provided for future phylogenetic studies.

著者

Masami Obuchi

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.309-328, 2020-11-16 (Released:2020-11-17)

参考文献数

67

被引用文献数

1

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A faunal investigation of shallow-water (<50 m) comatulids of the Ashizuri-Uwakai Sea, Shikoku Island, southern Japan was performed between mid-2011 and early 2015, using scuba. It revealed that 30 species of seven families are distributed in the area, including two tropical species, Clarkcomanthus mirabilis (Rowe, Hoggett, Birtles, and Vail, 1986) and Clarkcomanthus mirus (Rowe, Hoggett, Birtles, and Vail, 1986) that are recorded in Japanese waters for the first time, as well as two species recently described during the research. Seventy-five percent of the listed species are tropical species, and 70% are shared with the fauna of the Ryukyu Islands, the southernmost part of Japan. These results agree with the general feature of the Ashizuri-Uwakai Sea in which the biota is strongly influenced by the Kuroshio Current flowing from the south.Key Words:feather stars, marine fauna, new records, Kuroshio Current.

著者

Hiroshi Kajihara

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.251-273, 2020-10-28 (Released:2020-10-28)

参考文献数

45

被引用文献数

2

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Three species of nemerteans, Balionemertes cf. australiensis Sundberg, Gibson, and Olsson, 2003 (Palaeonemertea), Prosadenoporus olympiae sp. nov. (Hoplonemertea: Eumonostilifera), and Coella gloriae sp. nov. (Hoplonemertea: Polystilifera: Reptantia), are reported based on material collected intertidally at a rocky shore in Cebu Island, Republic of the Philippines. Cytochrome c oxidase subunit I (COI) barcode sequences of these species have earlier been published elsewhere. The Cebu specimen that is herein identified tentatively as Balionemertes cf. australiensis posseses i) small black dots on the ventral body surface, ii) a neurochord in the lateral nerve, iii) serial rhynchocoelic septa, and iv) nephrostomes, characters that were not mentioned in the original description of the species from Australia; the exact species identification requires barcode sequences from topotypes. Prosadenoporus olympiae can be differentiated morphologically from other congeners by having three accessory-stylet pouches; when alive, worms of this species showed negative hydrotaxis. Coella gloriae differs from all the reptantic polystiliferans by having i) four rows of the eyes, ii) the cephalic furrows, iii) no dorsal marking, iv) separate mouth and proboscis openings, v) blind-ending extracerebral vessels, vi) non-forked fibre core in the dorsal ganglia, vii) the subdorsal nerves, and viii) the cerebral organs partly overlapping the brain.

著者

Naohide Nakayama Takaaki Tamai

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.25, no.1, pp.55-60, 2020-01-25 (Released:2020-01-25)

参考文献数

19

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A rare lizardfish, Synodus mundyi Randall, 2009, is newly reported from the northwestern Pacific around Japan, based on a single specimen (147 mm in standard length) collected from off Muko-jima island of the Ogasawara Islands at a depth of 63 m. Prior to the present study, the species was represented by only the two type specimens collected from the Hawaiian Islands. Among Japanese congeners, it is most similar to the Indo-Pacific Synodus doaki Russell and Cressey, 1979 especially in having a very long nasal flap, but differs notably from the latter in that the tip of the pectoral fin extends well beyond a line connecting the dorsal- and pelvic-fin origins (vs. just reaching this level). The Japanese specimen is fully described, with a color photograph of the fresh specimen. A new standard Japanese name, “Kaede-eso”, is proposed for S. mundyi.

著者

Naoya Takeda Hiroshi Kajihara

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.23, no.1, pp.1-11, 2018-05-25 (Released:2018-05-26)

参考文献数

15

被引用文献数

3

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We have described a new genus and five new species of free-living marine flatworms in Schizorhynchia (Platyhelminthes: Rhabdocoela: Kalyptorhynchia) based on the material collected from sandy intertidal zones around Hokkaido, Northern Japan. These include Freddius tricaudatus gen. et sp. nov. (Cheliplanidae) and Proschizorhynchella caudociliata sp. nov., P. magnoliae sp. nov., P. shibazakii sp. nov., and P. shuttlecock sp. nov. (Schizorhynchidae). Based on this study, the number of confirmed species in the suborder Kalyptorhynchia discovered in Japanese waters has increased from one to six. Freddius tricaudatus gen. et sp. nov. possesses proboscis hooks that are so peculiar among Cheliplanidae that they warrant the establishment of a new genus.

著者

Hiroyuki Ariyama Masanori Taru

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.22, no.2, pp.187-200, 2017-11-25 (Released:2017-12-05)

参考文献数

18

被引用文献数

3

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Three species of Grandidierella (Crustacea: Amphipoda: Aoridae) were collected from coastal areas of the Tohoku and Kanto-Tokai Districts, East Japan. The first species is G. sanrikuensis sp. nov. from Miyagi Prefecture, which is characterized by the male gnathopod 1 with carpus bearing 3 teeth (only middle tooth large). The second species is G. rubroantennata sp. nov. from Chiba Prefecture. This new species is identical with G. insulae sensu Ariyama (1996), but is different from the true G. insulae Myers, 1981 in the more flagellar articles of the antennae. The last species is G. osakaensis Ariyama, 1996, from river mouths in Kanagawa and Shizuoka Prefectures and an anchialine pool in Izu Oshima Island, Tokyo Prefecture. This species can inhabit various sandy mud bottoms in a brackish environment. Including G. japonica Stephensen, 1938, four Grandidierella species occur in the districts.

著者

Mizuki Matsunuma Fumihito Tashiro Hiroyuki Motomura

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.29, no.1, pp.9-21, 2024-01-11 (Released:2024-01-11)

参考文献数

31

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Pseudorhombus elevatus Ogilby, 1912 and P. quinquocellatus Weber and de Beaufort, 1929 (Teleostei: Paralichthyidae) are newly recorded from Japan, based on 35 and two specimens, respectively, from Okinawa Island, Ryukyu Islands. Although both species have previously been recorded from Taiwan, no Japanese records are known to date. Pseudorhombus elevatus is characterized, and readily distinguished from Japanese congeners, by numerous minute teeth on both jaws, three dark blotches along the straight section of the ocular-side trunk lateral line, and dorsal- and anal-fin ray numbers. Pseudorhombus quinquocellatus resembles P. pentophthalmus Günther, 1862 and P. oculocirris Amaoka, 1969, all sharing five dark ocelli on the ocular-side body (two pairs of ocelli above and below the lateral line plus a single ocellus on the posterior portion of the lateral line). However, the former is characterized by strong caniniform teeth on both jaws (vs. no strong caniniform teeth in P. pentophthalmus and P. oculocirris); fewer lower gill rakers (9–11 in Japanese specimens) (vs. 15–21); and two dark skin flaps along the gill opening below the pectoral-fin base (vs. absent). The status of the type specimens of P. quinquocellatus was also considered, all three being regarded as syntypes, in the absence of a formal lectotype proposal. New standard Japanese names, “Maru-ganzō-birame” and “Niten-ganzō-birame,” are proposed for P. elevatus and P. quinquocellatus, respectively, the name “Itsutsume-ganzō” now being referred to P. megalops Fowler, 1934.

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.59, 2023-04-10 (Released:2023-04-10)

被引用文献数

1

著者

Ko Tomikawa Norio Kobayashi Hiroshi Morino

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.21, no.1, pp.55-64, 2016-05-25 (Released:2017-02-01)

参考文献数

26

被引用文献数

1

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The taxonomic subdivision of certain Japanese freshwater amphipods into Jesogammarus jesoensis (Schellenberg, 1937), J. hokurikuensis Morino, 1985, J. fujinoi Tomikawa and Morino, 2003, and J. shonaiensis Tomikawa and Morino, 2003 was reassessed using both morphological and molecular data. Putative diagnostic morphological characters did not exhibit consistent geographic distributions, but eight geographically consistent monophyletic clades were detected based on COI and COI+12S rRNA sequence data. Uncorrected COI nucleotide divergences between the clades ranged from 7.0% to 16.4%, a level usually considered to represent inter-specific differences in crustaceans. No morphological features that differentiate the molecular clades were found. While the formal nomenclatural handling of these findings remains a problem for the future, for now we suggest the use of the term “J. jesoensis complex” to represent taxonomic entity consisting of the nominal taxa J. jesoensis, J. fujinoi, J. shonaiensis, and J. hokurikuensis, and potentially a number of hitherto cryptic taxa as well.

著者

関口 秀夫

出版者

The Japanese Society of Systematic Zoology

雑誌

動物分類学会誌 (ISSN:02870223)

巻号頁・発行日

vol.22, pp.24-34, 1982-05-25 (Released:2018-03-30)

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三重県英虞湾における夜間灯火採集のプランクトン試料中より得られた6種のモンストラ科橈脚類を記載した.これらはMonstrilla serricornis, Monstrilla sp., Cymbasoma longispinosum, C. rigidum, C. morii, C. agoenisである.この中でC. agoensisは新種であり,M. serricornis, C. longispinosum, C. rigidumの3種は日本近海より未報告の種であるM. serricornisは第1アンテナの特異な鋸歯状突起,C. longispinosumは交接器の形態,C. rigidumは第5胸脚の形態と刺毛数,C. moriiは透明な体部と第5胸脚の刺毛数,C. agoensisはoral coneの欠如と第5胸脚の刺毛数によって他種と明瞭に識別できる.

著者

Kazuya Nagasawa

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.26, no.2, pp.137-143, 2021-06-17 (Released:2021-06-17)

参考文献数

35

被引用文献数

3

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Specimens of two species of lernaeopodid copepods, Salmincola edwardsii (Olsson, 1869) and Salmincola markewitschi Shedko and Shedko, 2002, were collected from chars (Salvelinus spp.) reared in exhibition tanks of the Sapporo Salmon Museum, Hokkaido, Japan. Descriptions of these copepods are provided using the specimens. In 1988, adult females of S. edwardsii were found on the gills of southern Asian Dolly Varden, Salvelinus malma krascheninnikova Taranetz, 1933, and those of S. markewitschi in the buccal cavity of whitespotted char, Salvelinus leucomaenis (Pallas, 1814), Nikko char, Salvelinus leucomaenis pluvius (Hilgendorf, 1876), and brook trout, Salvelinus fontinalis (Mitchill, 1814). These copepods are considered to have been introduced to the museum in the late 1980s along with wild chars transported live from natural waters of Hokkaido. Adult copepods have been manually removed using forceps once or twice a year from reared chars, but such infrequent practices have not been effective to eliminate S. markewitschi, which was thus collected again in 2020. In contrast, S. edwardsii was completely eliminated by stopping rearing an infected population of southern Asian Dolly Varden, to which this parasite is host-specific.

著者

Yuzo Ota Hisanori Kohtsuka Katsuhiko Tanaka

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.26, no.2, pp.207-216, 2021-09-10 (Released:2021-09-10)

参考文献数

32

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Adult male and larva of Gnathia capitellum sp. nov. (Crustacea: Isopoda: Gnathiidae) are described. The specimens were laboratory-reared larvae that infested host fishes collected by longline fishing in a coastal bay of Izu Peninsula and adult males found in dredge samples from shallow water (depth: 11–12 m) of Miura Peninsula, central Japan. Adult males of G. capitellum sp. nov. were easily distinguished from the other species of Gnathia Leach, 1814 from around the world by the small oval head and the inner margin of pylopod without plumose setae. Most other Gnathia species have a large rectangular head and plumose setae present on the article 1 of pylopod. Appearance of the adult male resembles the genus Afrignathia Hadfield and Smit, 2008 rather than Gnathia but Afrignathia has maxilla 1 which is absent in all known male gnathiids in the world including G. capitellum sp. nov. Fish parasitic larva of G. capitellum sp. nov. is also described herein. This larva closely resembles larvae of the genus Gnathia, but can be distinguished from the other Gnathia species by the remarkably oval-shaped basis in pereopods 2–4.

著者

Ken-ichi Okumura Zhe Zhao

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.26, no.2, pp.235-240, 2021-09-10 (Released:2021-09-10)

参考文献数

11

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This study describes a new species of the subfamily Coelotinae (Agelenidae) from Kinki district, central Japan, under the name of Coelotes nojimai sp. nov. It resembles C. yodoensis Nishikawa, 1977 and C. nagaraensis Nishikawa, 2009 but is characterized by a male palp with a large and greatly curved conductor and slender spermathecae in the internal genitalia of female specimens. The morphological differences and distribution ranges of these three species have been discussed in detail. In addition, the mitochondrial cytochrome c oxidase subunit I (mt-COI) partial sequences of the new species have been analyzed and documented for future use.

著者

B. A. Venmathi Maran Susumu Ohtsuka Xu Shang

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.17, no.2, pp.201-219, 2012-11-25 (Released:2018-03-30)

参考文献数

92

被引用文献数

4 7

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Adults of caligiform copepods are often found in plankton samples, in addition to the naupliar and copepodid stages. Here, we report on adult parasitic copepods of the families Caligidae and Pandaridae from plankton samples collected in Japanese and Chinese coastal waters. The following previously described species were found in 2008: Caligus calotomi Shiino, 1954; C. orientalis Gusev, 1951; C. undulatus Shen and Li, 1959; Lepeophtheirus semicossyphi Yamaguti, 1939; Metacaligus uruguayensis Thomsen, 1949, and Pandarus satyrus Dana, 1852 in Japanese waters; and C. orientalis and C. rotundigenitalis Yu, 1933 in Chinese waters. The findings of adults of Lepeophtheirus and Metacaligus in plankton samples represent the first such a record for each genus. Two new species of Caligus are also described from plankton taken in Japanese waters in 2008 and 2010. An ovigerous female collected from off Iheya Island, Ryukyu Islands, Okinawa Prefecture is described as Caligus quadrigenitalis sp. nov., and two adult females and a male collected from the Seto Inland Sea and off Hirado Island, Kyushu, western Japan is described as Caligus ogawai sp. nov.

著者

Daisuke Shimada Atsushi C. Suzuki Megumu Tsujimoto Satoshi Imura Keiichi Kakui

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.26, no.1, pp.49-63, 2021-03-22 (Released:2021-03-22)

参考文献数

81

被引用文献数

4

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Two new species of free-living marine nematodes, Odontophora odontophoroides sp. nov. and Parabathylaimus jare sp. nov., are described from the coastal sand of Langhovde, Lützow-Holm Bay, Dronning Maud Land, Antarctica. Odontophora odontophoroides sp. nov. is the only species in Odontophora Bütschli, 1874 that has bicuspidate odontia. Odontophora odontophoroides sp. nov. is similar to species in Odontophoroides Boucher and Helléouët, 1977 and Synodontium Cobb, 1920 in having bicuspidate odontia, but differs in having a didelphic reproductive system in females. Parabathylaimus jare sp. nov. differs from congeners in the unjointed inner labial and cephalic sensilla, the outer labial sensilla three-jointed in males and two-jointed in females, the position of the amphids, the shorter spicules, and the conical tail without long subterminal setae. Modified generic diagnoses and keys to species are included for Odontophora and Parabathylaimus De Coninck and Schuurmans Stekhoven, 1933. A new combination, Parabathylaimus arthropappus (Wieser and Hopper, 1967) comb. nov., is established.

著者

Masato Nitta

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.24, no.2, pp.145-150, 2019-07-25 (Released:2019-07-25)

参考文献数

34

被引用文献数

3

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Neoheterocotyle quadrispinata n. sp. (Monogenea: Monocotylidae) is described from the gills of Rhinobatos hynnicephalus Richardson, 1846 (Rhinopristiformes: Rhinobatidae) in the central Seto Inland Sea, Hiroshima Prefecture and the southern Sea of Japan, Fukuoka Prefecture, Japan. This is the first report of a Neoheterocotyle species from Japan. The new species is morphologically most similar to N. forficata (Timofeeva, 1981) and N. rhinobatidis (Young, 1967) in having two pairs of dorsal haptoral accessory sclerites but differs from them in that the penis is curved proximally and the accessory piece has a blade-shaped process.

著者

Tsukasa Waki Satoshi Shimano Takahiro Asami

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.24, no.1, pp.11-15, 2019-05-01 (Released:2019-05-01)

参考文献数

19

被引用文献数

2

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The parasitic mite Riccardoella (Proriccardoella) triodopsis Fain and Klompen, 1990 was sampled from two localities in Chiba prefecture, Japan. The sampled mites were identified based on palps and leg chaetotaxy and structure of famulus on tibia I. This study is represented by the second record of R. triodopsis inhabiting the pulmonate snail and the first discovery in Japan.

著者

Hirotaka Katahira Hokuto Shirakawa Kazuya Nagasawa

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.19, no.2, pp.157-165, 2014-11-25 (Released:2018-03-30)

被引用文献数

1

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Five species of helminth endoparasite (two digeneans, Brachyphallus crenatus (Rudolphi, 1802) and Lecithaster gibbosus (Rudolphi, 1802); two cestodes, plerocercoids of Nybelinia surmenicola (Okada in Dollfus, 1929) and a tetraphyllidean; and an acanthocephalan, post-cystacanths of Bolbosoma sp.) were found in adults of Arctic lampreys Lethenteron camtschaticum (Tilesius, 1811) arriving in the lower part of the middle reaches of a river in Hokkaido, Japan, for spawning after a period of growth in the sea. These parasites are all common species previously reported from various marine fishes in the North Pacific and all have complex life-cycles involving host-to-host transmission via a predator-prey relationship. To have become infected with these food-borne parasites, Arctic lampreys need to have ingested various body parts of infected prey fishes at sea. Consequently, the endoparasites recovered suggest that the Arctic lamprey has a role as a predator in marine ecosystems.

著者

Hiroshi Kajihara Kotaro Tamura Shinri Tomioka

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.23, no.1, pp.13-37, 2018-05-25 (Released:2018-05-26)

参考文献数

39

被引用文献数

10

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Seven (including six new) species of interstitial hoplonemerteans in the genus Ototyphlonemertes Diesing, 1863 are described from southern Vietnam. The descriptions are based on light microscopic examination of internal structures as well as three methods of molecular species delimitation analyses, i) Automatic Barcode Gap Discovery (ABGD), ii) Poisson Tree Process (PTP), and iii) statistical parsimony, on the basis of ~658-bp cytochrome c oxidase subunit I gene sequences that have been i) newly determined from the Vietnamese specimens and ii) deposited in the public databases for other Ototyphlonemertes species. Three taxa are circumscribed as ‘species groups’ and placed at an infra-subgeneric, supra-specific rank, each represented by O. duplex Bürger, 1895, O. macintoshi Bürger, 1895, and O. parmula Corrêa, 1950. Of the seven Vietnamese species, one is identified as Ototyphlonemertes (species group macintoshi) ani Chernyshev, 2007, which is molecularly confirmed to be distributed from Vietnam (Phu Quoc and Nha Trang) to Japan (Okinawa and Wakayama). The other six are new to science, to which formal taxonomic descriptions are given: these are O. (duplex) chernyshevi sp. nov., O. (duplex) envalli sp. nov., O. (duplex) norenburgi sp. nov., O. (parmula) lei sp. nov., O. (parmula) nakaoae sp. nov., and O. (parmula) tsukagoshii sp. nov.