著者
小松 貴
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.44, pp.39-51, 2018-02-28 (Released:2018-03-20)
参考文献数
78

There are many rock grike of various sizes under the ground. Recent studies have revealed that the grike is habitat for troglobiontic organisms that are extremely specialized to live within it. In this paper, focused on troglobiontic arthropods in Japan, the diversity of the species is discussed, together with a threat to their survival.
著者
矢﨑 裕規 島野 智之
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.71-83, 2020-02-29 (Released:2020-03-13)
参考文献数
55

A new revision of the higher taxonomic classification of eukaryotes was published in 2019 in the journal of the International Society of Protistologists, Journal of Eukaryotic Microbiology. In the seven years since the last revision made in 2012, the large-scale multigene phylogenetic analyses in the background of the recent advancement of sequencing technology have revealed the affiliation of many “orphan” lineages and taxa. The major changes in this revision are the following four points: i) Excavata is not adopted to be a clade, ii) CRuMs as an assembly of Collodictyonida, Rigifilida, and Mantamonas is adopted to be a clade as the relatives of Amorphea, iii) Haptista consisted of Haptophyta and Centrohelida is adopted as a new clade, and iv) Crypista is also adopted as a new clade.
著者
田中 颯 生野 賢司
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.45, pp.28-32, 2018-08-31 (Released:2018-08-31)
参考文献数
32

This paper summarizes the previous amendments of the 4th edition of the International Code of Zoological Nomenclature and presents the Japanese version of the latest provisional amendment and the explanatory note published by the International Commission on Zoological Nomenclature in March 2017. In the latest provisional amendment, four recommendations were added to Article 73 and one term, “specimen, preserved”, was added to the Glossary concerning the establishment of a new species-group taxon without a preserved name-bearing type. Additionally, we review the background of this provisional amendment. All zoologists should pay careful attention to this amendment in order to advance zoological sciences and their reproducibility.
著者
Etsuro Sawai Yusuke Yamanoue Laith Jawad Juma Al-Mamry Yoichi Sakai
出版者
日本動物分類学会
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.22, no.1, pp.99-104, 2017-05-25 (Released:2017-05-25)
参考文献数
20
被引用文献数
6

We employed molecular systematic analysis based on mitochondrial D-loop sequences to identify two specimens of ocean sunfish from Omani coastal waters that had previously been identified morphologically as Mola mola (Linnaeus, 1758) and M. ramsayi (Giglioli, 1883). Of the three molecular species that are recognized globally, Mola sp. A, Mola sp. B, and Mola sp. C, we confirmed that both specimens from Oman are Mola sp. A. This result suggested a broader distribution of this species than had ever been thought, but it also revealed a discrepancy between morphological and genetic characters in Mola taxonomy. We reexamined the morphology of the two specimens from Oman to clarify the extent to which the key morphological features correspond with molecular genetic identifications, and discovered errors in the original reports on both specimens.
著者
藤田 敏彦
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.45, pp.4-15, 2018-08-31 (Released:2018-08-31)
参考文献数
47

The Echinodermata is, in terms of species, one of the largest of animal phyla. They are distributed exclusively and widely in the marine environment, where they occupy important biological and environmental roles. Despite their relevance, relatively few scientists have studied echinoderms in Japan. I have comprehensively surveyed the echinoderm fauna of Japan and adjacent regions, and have discovered diverse and intriguing taxa. My research on these species has utilized diverse approaches, including taxonomy, phylogeny, ecology, morphology and paleontology. I have also initiated educational and outreach activities intended to encourage the study of echinoderm biology and natural history, including an annual scientific meeting emphasizing echinoderm research in Japan. Thanks to collaboration with students in my laboratory, scientific colleagues and “citizen scientists” including fans of echinoderms, we have seen a significant increase in Japanese echinoderm research.
著者
大塚 攻 田中 隼人
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.49-62, 2020-02-29 (Released:2020-03-13)
参考文献数
87

One of the major crustacean groups, Maxillopoda had accommodated Mystacocarida, Copepoda, Thecostraca, Tantulocarida, Ostracoda, Branchiura, Pentastomida, and some fossil taxa, and was generally defined by some combinations of the following characters: body tagma composed of 5 cephalic, 6 (or 7) thoracic and 5 (or 4) abdominal somites; male gonopore (s) located on the first abdominal somite; uniramous antennules; naupliar eyes with tapetal cells, and so on. However, the monophyly of maxillopodans is totally rejected by a number of genetic analyses, while palaeontological and morphological approaches still recognize not only maxillopodans but also entomostracans as valid taxa. Since this issue is not well documented in Japan, the present paper briefly introduces modern phylogenetic studies on maxillopodan crustaceans, in particular Copepoda and Ostracoda.
著者
Yusuke Yamana Hayato Tanaka Shu Nakachi
出版者
日本動物分類学会
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.22, no.1, pp.53-68, 2017-05-25 (Released:2017-05-25)
参考文献数
32

Three new sea cucumbers collected in the intertidal and subtidal zone of southern Japan, Taeniogyrus mijim sp. nov., Rowedota chippiru sp. nov., and R. motoshimaensis sp. nov., are described. All three species display a small body size (approximately 10–20 mm), light body colour (primarily a transparent solid colour), and a small number of digits in their tentacles (one pair or two). They are easily distinguished from each other and from other congeners by the number of digits and by ossicle size and shape. Among these species, the state of the tooth series on the inner margin of the wheel ossicles is an important defining feature, i.e., a continuous row in Taeniogyrus but interrupted by concavities in Rowedota. Also, each tooth is sharp in T. mijim, trapezoidal in R. chippiru, and semicircular in R. motoshimaensis. The number of teeth per radiant is 7–16 (means of 10–13 in different specimens) in T. mijim, 7–15 (means 9–12) in R. chippiru, and 8–21 (means 11–19) in R. motoshimaensis. Among these three new species, only R. chippiru has thick rod ossicles in the body wall.
著者
富川 光 森野 浩
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.32, pp.39-51, 2012-02-20

Amphipods (Crustacea) are most diverse in marine environment but not a few species occur in freshwaters. To date, 36 species of freshwater amphipod taxa have been recorded from Japan. However, there are no taxonomical reviews of Japanese freshwater amphipods. In this paper, Japanese name, scientific name, major feature, and distribution for all species of Japanese freshwater amphipods are marshalled. In addition, a key to species is provided for identification of freshwater amphipods in Japan. Figures provided with this key indicate features of taxonomic importance. We proposed the new Japanese names for the following family/genera/species in this paper: families Luciobliviidae and Bogidiellidae, genera Octopupilla, Lucioblivio and Bogidiella, and species Octopupilla felix, Lucioblivio kozaensis and Bogidiella broodbakkeri.
著者
吉田 朋弘 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
no.39, pp.17-24, 2015-08-31

Ostorhinchus fleurieu Lacepede, 1802 is recorded from Japan for the first time on the basis of 21 specimens (37.6-106.8mm standard length) collected from Kagoshima Prefecture, southern Japan. On the basis of underwater photographs, Osezaki, Izu Peninsula, is regarded as the northernmost record of the species. The new Japanese name "Kongo-tenjikudai" is proposed for the species. Comparisons of Ostorhinchus fleurieu with closely related species, O. aureus, based on 21 and 12 specimens, respectively, from Japan showed that O. fleurieu differed from O. aureus in having fewer total gill rakers (19-21, mode 21 vs. 23-24, 24 in the latter) and developed gill rakers (16-18, 18 vs. 18-21, 20), the pelvic-fin base located below the first lateral-line scale (vs. second scale), and a poorly defined, barrel-shaped black band on the caudal peduncle (vs. well-defined, sandglass-shaped band).
著者
田中 隼人
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.45, pp.16-27, 2018-08-31 (Released:2018-08-31)
参考文献数
71

This study reports the taxonomy, ecology and evolution of interstitial Ostracoda (Crustacea). Taxonomy and ecology of interstitial ostracods from river mouth were discussed. High salinity tolerance of the interstitial ostracods living river mouth was proven by field distribution and laboratory experiment. The author hypothesizes that ancestral marine interstitial species which has high salinity tolerance have been migrated to the river mouth environment where salinity varies drastically. From the mating experiment of Parapolycope spiralis, multi-step of pre-copulatory behavior was observed: (1) the male captures the female by a sucker on the antennula; (2) the male clasps and maintains the mating position using the endopodite claw and the exopodite of the antenna; (3) the male makes contact using the distal part of the upper lip; and (4) copulation takes place. The male upper lip shows species-specific and largely diverged morphologies in the Parapolycope species. The specific contact stimuli might be caused by various shapes of male upper lip and then females discriminate a favorable mating partner depending on these stimulations. The author concluded the species-specific morphologies of male upper lip have evolved by female mate choice. In addition, this study provides a brief overview of several taxonomic studies on marine ostracods.
著者
泉 貴人 藤井 琢磨 柳 研介
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.46, pp.54-63, 2019-02-28 (Released:2019-03-23)
参考文献数
22

Until recently, Actiniaria had been classified by the classification system organized by Carlgren in 1949. This classification was based on several traditional morphological features such as mesenterial arrangement, basal disc, acontium, and sphincter muscle. Although this classification system had been used for around 60 years, it was recently called into question by several studies utilizing molecular phylogenetic analyses. The most comprehensive phylogenetic analyses clarified that the Carlgren classification system did not reflect the actual phylogenetic relationships, and thus a new classification system from suborder to superfamily was established. At the same time, new common morphological features were proposed as the traditional morphological features of sea anemones in Carlgren’s classification system were proven to not be monophyletic. Here, we introduce the new classification system and propose Japanese names for all taxa higher than family.
著者
甲斐 嘉晃 美坂 正
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.41, pp.23-29, 2016-08-30 (Released:2017-02-07)
参考文献数
33

A recent taxonomic review has revealed that three species of Ammodytes (Ammodytes japonicus, Ammodytes heian, and Ammodytes hexapterus) are distributed in Japanese waters. Species identification using morphological characters is difficult due to their similar appearance. A rapid and convenient method for identifying the three species of Ammodytes from Japan was developed via a multiplex haplotype-specific (MHS)-PCR of the mitochondrial COI region. Two primers designed for A. japonicus and A. hexapterus yielded species-specific amplification products in different sizes (ca. 500 bp and 300 bp, respectively). Together with a pair of universal primers for fish, about 1,500 bp can be amplified by MHS-PCR, which allows the robust identification of the three species of Ammodytes.
著者
井口 亮 水山 克 頼末 武史 藤田 喜久
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.46, pp.28-33, 2019-02-28 (Released:2019-03-23)
参考文献数
23

In the submarine caves of the Ryukyu Islands, the existence of many non-described species has been indicated in field surveys. To estimate the magnitude of biodiversity in the submarine caves, application of genetic analyses would provide a promising approach. Genetic analysis by DNA barcoding based on mitochondrial cytochrome c oxidase subunit I (COI) is informative for the study of submarine caves because the data of COI region have been accumulated in many marine animals. Also, in order to understand the formation process of communities of submarine caves, population genetic approaches would be useful to evaluate the connectivity patterns among submarine caves which are not continuously distributed along the Ryukyu Islands. In addition, utilization of high-throughput sequencing technology (e.g., environmental DNA (eDNA) analysis) would be also powerful for the ecological studies of submarine caves of the Ryukyu Islands. We discuss the current situation of genetic analyses in the submarine caves of the Ryukyu Islands and propose the prospects of genetic analyses for future studies.
著者
広瀬 雅人
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.33, pp.17-32, 2012-08-20 (Released:2018-03-30)
参考文献数
80

Bryozoans comprise a phylum of sessile, clonal animals, inhabiting marine and freshwater environments. Only around 90 species have been described from freshwater habitats, most belonging to the class Phylactolaemata. Phylactolaemates can propagate asexually by forming encapsulated dormant bodies called statoblasts, which provide characters highly useful in phylactolaemate taxonomy and identification. To date, 23 species of phylactolaemate species in ten genera have been reported from Japan, however their taxonomical review has been never reported. Furthermore, current taxonomy of phylactolaemates is heavily depending on the observation of statoblast microsculpture by using scanning electron microscopy, which causes difficulty of simple identification. In this paper, major characters of colony and statoblast for all species of Japanese freshwater bryozoans including both 23 phylactolaemates and three ctenostomes are summarized. A key to species based on colony and statoblast gross morphology is also provided for help in identification of freshwater bryozoans in various fields such as faunal survey and education.
著者
柁原 宏
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.30, pp.9-16, 2011-02-20

ZooBank is intended as the offcial registry of Zoological Nomenclature, according to the International Commission on Zoological Nomenclature. Since its launch in 2005, more than 73,000 records of Nomenclatural Acts, >29,000 Publications, and >11,000 Authors have been deposited in ZooBank as of this writing. An explanatory introduction for ZooBank and proposed three scenarios for mandatory registration of names governed by the International Code of Zoological Nomenclature is given in the Japanese language to popularize relevant issues in domestic taxonomic researchers
著者
日比野 友亮 中村 亨 木村 清志
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.42, pp.48-53, 2017-02-28 (Released:2017-02-28)
参考文献数
9

A specimen of the tilefsh, Hoplolatilus fourmanoiri Smith, 1964 was collected from off Amitori Bay, Iriomote Island, Yaeyama Islands of the Ryukyu Islands, Japan. It represents the northernmost record for the species and the first record of the species from Japan. Hoplolatilus fourmanoiri can be distinguished from its congeners by the following combination of characters: caudal fin not forked; pointed spines located at corner of the preopercle and the mid-posterior margin of the opercle; maxillary broad, its maximum depth almost equal to diameter of pupil; ctenii of scales prominent; a large dark blotch located at posterior tail to caudal fin; a yellow band running from head to shoulder. The present specimen has a slightly deeper head (69.7% of head length vs. 62–68%) and more scales below lateral line (42 vs. 34–41) than other specimens, but these differences are insignificant. The dark posterior blotch of the present specimen is paler and more yellowish than the previous report, however the body coloration of the Japanese specimen is paler, which we feel is due to the condition of the specimen. The shape of the caudal fin of H. fourmanoiri was formerly described as truncate with dorsal produced. We described it as shallow double truncate. A new standard Japanese name “Hotarubi-sango-amadai” is proposed for the species.