著者

古屋 秀隆

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.48, pp.3-12, 2020

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<p>Dicyemids (phylum Dicyemida) are endosymbionts that typically are found in the renal sac of benthic cephalopod molluscs. The dicyemid bodies consist of only 8 to 40 cells, which are the fewest in number of cells in metazoans, and are organized very simply. Typically, two or three dicyemid species are found in a single specimen of the host, and most of them show high host specificity. Dicyemid species have been examined in the benthic cephalopods collected from the Kumano Sea at a seafloor depth of 150–400 m using bottom trawl nets since 2013. Twenty-five undescribed species of dicyemids, included in five genera, were found in 15 species of cephalopods. There is a considerable diversity of dicyemids in relatively narrow range of localities of the Kumano Sea. Here current taxonomic studies on dicyemid fauna in the Kumano Sea are briefly reported.</p>

著者

古屋 秀隆

出版者

日本動物分類学会

雑誌

タクサ : 日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

no.13, 2002-08-20

著者

古屋 秀隆

出版者

日本動物分類学会

雑誌

タクサ : 日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

no.21, pp.19-32, 2006-08-20

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Dicyemid mesozoans (phylum Dicyemida) are endoparasites that are typically found in the renal sac of benthic cephalopod molluscs. Dicyemid bodies are very simply organized, consisting of only 8 to 40 cells, which is the fewest number of cells in metazoans. The current paper gives an overview of the morphology of dicyemids and reviews current status of the taxonomy of dicyemids. The renal sac of cephalopods is a unique environment providing habitat for a diversity of dicyemids. The current paper also reviews recent advances in several biological aspects, such as prevalence, zoogeography, and host specificity. The degree of host specificity differs among different species of dicyemids, although the recent study reveals narrow host specificity. Most previous descriptions were based on the character of vermiform stages, and several species seem to be incorrectly identified. The current study suggests that the cellular composition and cell types of infusoriform embryos are significant characters used to help identify dicyemids species. In addition, the type host specimen for a new species of parasite is briefly discussed The accurate identification of a host organism is an important component in the taxonomic recognition of a new species of parasite.

著者

Grygier Mark J. Olesen Jorgen

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.9, 2000

著者

朝倉 彰

出版者

日本動物分類学会

雑誌

タクサ : 日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

no.21, pp.33-39, 2006-08-20

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In 1997, Masatsugu Takano and the applied population genetics research group at Tohoku University published a ground-breaking paper on biochemical and morphological evidence indicated that there were two sympatric forms, interpreted as sibling species, of the common crab Hemigrapsus penicillatus (De Haan). This species is very common in intertidal rocky shores, pebble beaches and mud flats in Japan, Korea and China, but prior to Takano et al., no one had noticed that the species comprised two different forms. A recent intensive study by Prof. Seiichi Watanabe, Tokyo University of Marine Science and Technology, and his research group revealed further differences between the two forms, including coloration, allometry, egg size and number, and geographical distribution. Watanabe and myself recognized these as two distinct species and described one of them as a new species Hemigrapsus takanoi in 2005.

著者

磯野 直秀

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.6, pp.14-18, 1999-02-15 (Released:2018-03-30)

参考文献数

3

著者

岩坪 洸樹 本村 浩之

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.37, pp.21-27, 2014-08-28 (Released:2018-03-30)

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Some species of damselfishes (Pomacentridae) have a bright blue body color. The body surface of these species has scattered iridophores, which induce changes in their blue coloration. The blue color is readily converted to blackish color during formalin fixation of fresh specimens, making it difficult to take photographs of specimens of bluish damselfishes representing live coloration. In this study, an innovative method for restoring the blue coloration in formalin fixed specimens of bluish damselfishes is described. Chromatophore conditions before and after the blue coloration restoration are also illustrated. In addition, a glycerol penetration method to preserve the blue coloration of glycerin immersion preserved specimens are discussed.

著者

斉藤 知己

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.24, pp.33-46, 2008-02-20 (Released:2018-03-30)

参考文献数

34

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An overview of the taxonomy of the stenopodidean shrimp family, Spongicolidae Schram, 1986 (Crustacea: De capoda) is provided. The family contains 34 described species of 6 genera: Globospongicola Komai and Saito, 2006, Microprosthema Stimpson, 1860, Paraspongicola de Saint Laurent and Cleva, 1981, Spongicola de Haan, 1844, Spongicoloides Hansen, 1908 and Spongiocaris Bruce and Baba, 1973. Only Microprosthema comprises free-living species in shallow rocky reefs, while shrimps of the other genera are primarily obligate symbionts of deep-water hexactinellid sponges, living in the atrium of hosts. Some of recent taxonomic studies are presented here. Larval development and geographic and bathymetric distributions of species are briefly discussed. The phylogenetic study clarified Microprosthema as the most basal genus, and Spongicoloides and Spongiocaris as the most derived genera among spongicolids. Decrease in number of gills and that of exopods on the second and third maxillipeds, and the loss of spiniation on carapace, pereopods and abdomen in the spongicolids (except for Microprosthema) were considered secondarily derived in relation to their sponge-associated habitat.

著者

岡西 政典

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.40, pp.17-21, 2016-02-29 (Released:2018-03-30)

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Paleontologists have long reconstructed phylogeny using comparisons between fossil record and recent taxa. On the other hand, biologists reconstruct phylogeny using molecules to produce a tree which they constrain using fossils and geographic events to provide estimates for phylogenetic events. Taking both extant and extinct species into account for systematic revisions is essential for biologists and paleontologists. In this paper, I demonstrate example of how paleontological methods, such as preparing thin sections and using x-ray and CT scans can also be applied to extant invertebrates. I provide further discussion of how robust integration between paleontologists and biologists is rewarding to both disciplines.

著者

岡西 政典

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.35, pp.1-15, 2013-08-30 (Released:2018-03-30)

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The order Euryalida Lamarck, 1816 (Echinodermata: Ophiuroidea) comprises 4 families, 48 genera and about 190 species and is known from marine water. By the examination of type specimens of 117 species, taxonomy of euryalid genera and species from the Western Pacific are revised. With junior synonymizations of 2 species and descriptions of 1 genus and 5 species, a total of 120 species were recognized in this region. Molecular phylogeny based on mitochondrial and nuclear genes reviewed family-level systematics of the order.

著者

田中 颯 若林 香織

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.40, pp.22-29, 2016-02-29 (Released:2018-03-30)

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Two forms of test are known in a fibulariid sea urchin, Fibulariella acuta (Yoshiwara, 1898). One is a "rice grain-shaped" in which both the anterior and the posterior tips are pointed. Another is an "egg-shaped" in which the anterior tip is pointed but the posterior is broad. This species was originally described as "egg-shaped;" nevertheless, the post described drawing of the syntype by the same author showed its "rice grain-shaped." Although many taxonomic examinations have been made to understand the meaning of difference between the two forms, the meaning has not been clarified until today. We here compared the external morphologies of the test and pedicellariae between the two forms based on 59 specimens from Kumamoto Prefecture, Japan. In addition to the external outline of the tests, morphology of pedicellariae was clearly different between the rice grain-shaped and egg-shaped specimens as follows: the former had three types of pedicellariae (globiferous, bidentate, and biphyllous), whereas the latter had only two types (globiferous and bidentate). These morphological differences suggest that the two forms of F. acuta should be revised as two different species.

著者

中野 隆文

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.34, pp.54-66, 2013

参考文献数

15

被引用文献数

1

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An amendment to the International Code of Zoological Nomenclature was passed on 4th Sept 2012 that formally establishes ZooBank as the online version of the Official Register of Zoological Nomenclature, and allows valid publication of new nomenclatural acts in electronic-only journals as well as electronic-first works. The amendment requires electronic-only, and electronic-first works to be registered in ZooBank, and to include the registration number ('ZooBank LSID') in the publication. Although registration of the names and nomenclatural acts themselves is not yet required for their availability, the amendment encourages authors to register all new names and nomenclatural acts, whether they are introduced in e-only publications or in standard paper publications as well as publications, names and acts that have been previously published. This paper provides a practical instruction manual in Japanese to assist taxonomists to register their work in ZooBank based on its new version 3.1.

著者

中村 潤平 本村 浩之

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.48, pp.41-48, 2020-02-29 (Released:2020-03-13)

参考文献数

19

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Thirty-two specimens (124.1–365.0 mm standard length) of Saurida undosquamis (Richardson, 1848) (Aulopiformes: Synodontidae), previously recorded from the Indo-West Pacific from Persian Gulf, Chagos Archipelago, Andaman Sea to Taiwan, Southeast Asia, Papua New Guinea and northern half and southwestern Australia, were collected from the mainland of Kagoshima Prefecture and Tanega-shima island in the Osumi Islands, southern Japan. These specimens represent the first records of S. undosquamis from Japanese waters and include the northernmost records (Kasasa, west coast of Satsuma Peninsula) for the species. The Japanese specimens are described here in detail and the new Japanese name “Tsukeage-eso” is proposed for the species.

著者

関口 秀夫

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.48, pp.84-91, 2020-02-29 (Released:2020-03-13)

参考文献数

38

著者

野田 泰一

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.2, pp.13-15, 1997-02-10 (Released:2018-03-30)

参考文献数

8

著者

新妻 昭夫

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.19, pp.87-89, 2005-08-20 (Released:2018-03-30)

著者

森滝 丈也

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.48, pp.34-40, 2020-02-29 (Released:2020-03-13)

参考文献数

19

被引用文献数

1

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Toba Aquarium regularly collects marine invertebrates from the Kumano Sea on the Pacific coast of central Japan. These animals are mainly used for exhibition in the aquarium as well as for taxonomic studies. When the taxonomic status of the animals is uncertain, we work with researchers to observe the specimens of those marine invertebrates. From 2006 to 2019, 382 species from 12 phyla have been so far recorded from the bathyal zone of Kumano Sea. Together with 26 researchers, we examined a total of 103 species collected during the surveys and nine out of them were described as new species. Using our rearing techniques, some interesting behaviors of the bathyal marine invertebrates were observed with live specimens in the aquarium.

著者

山根 柄根

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.9, pp.1-3, 2000

著者

本川 雅治 鈴木 仁 原田 正史

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.7, 1999

著者

川田 伸一郎 篠原 明男 小林 秀司 原田 正史 織田 銑一 林 良恭

出版者

日本動物分類学会

雑誌

タクサ : 日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

no.17, 2004-08-20