著者
Naoto Sawada Haruhiko Toyohara Takafumi Nakano
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.217-224, 2021-09-10 (Released:2021-09-10)
参考文献数
22

Sodium hypochlorite has been used for cleaning specimens of freshwater and brackish water snails that are covered with deposits. Our experiments using specimens of two freshwater snail species, Semisulcospira niponica (Smith, 1876) and S. reticulata Kajiyama and Habe, 1961, showed that this traditional method could remove thin deposit layers, including algae, but was not useful for obstinate deposits. We found that a new method using ammonium thioglycolate could be applied to remove obstinate iron-rich deposits. Though ammonium thioglycolate treatment caused loss of gloss inside the aperture, this loss could be prevented by plugging a kneaded eraser into an aperture. Moreover, the new method could clean specimens with little damage of the periostracum. So as to remove deposits with the least damage to shells, 3% w/v sodium hypochlorite was useful for deposits including algae, and 20% w/v ammonium thioglycolate was suitable for cleaning specimens with iron-rich deposits. Degeneration of the microstructure of inner whorls can be avoided by plugged shell apertures with a kneaded eraser in both methods. Shell deposits that are composed of both algae and iron should be treated first with 20% w/v ammonium thioglycolate, and then with 3% w/v sodium hypochlorite to remove the deposits. Appropriate cleaning methods enable accurate examination and long-term preservation of shell specimens.
著者
Ko Tomikawa Yuji Abe Takafumi Nakano
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.259-266, 2019-11-25 (Released:2019-11-25)
参考文献数
10
被引用文献数
3

A new species of pseudocrangonyctid amphipod, Pseudocrangonyx uenoi, is described from cave streams in Taga town, central Honshu, Japan. Previous molecular phylogenetic studies reported the taxonomic status of the Taga populations of Pseudocrangonyx as an undescribed species. We present the diagnostic features to discriminate P. uenoi from the other congeners on the basis of morphological study. Pseudocrangonyx uenoi is closely related to P. daejeonensis Lee, Tomikawa, Nakano, and Min, 2018, but clearly distinguished from the latter by the presence of calceoli on female antenna 2, the 5-dentate lacinia mobilis of the left mandible, setation of the peduncular articles of pleopods, the number of articles of rami of the pleopods, a shorter terminal article of uropod 3, and a telson with a deeper cleft.
著者
Takafumi Nakano Yi-Te Lai
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.143-150, 2017-11-25 (Released:2017-12-05)
参考文献数
21
被引用文献数
2

A quadrannulate leech species, Orobdella meisai sp. nov., from southern Taiwan is described. This new species is characterized by its camouflage coloration, which is unique among the known Orobdella species. Orobdella meisai is the second species of the genus to be described from Taiwan. Phylogenetic analyses using nuclear 18S rRNA, histone H3, mitochondrial cytochrome c oxidase subunit I, tRNACys, tRNAMet, 12S rRNA, tRNAVal, 16S rRNA, tRNALeu and NADH dehydrogenase subunit 1 markers showed that O. meisai and another Taiwanese species, O. ketagalan Nakano and Lai, 2012, formed a supported clade. According to the results of the morphological examination and the phylogenetic position of O. meisai, morphological-phylogenetic relationships of this species and close congeners are briefly discussed.
著者
Naoya Sata Hirohiko Takeuchi 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.171-175, 2020-08-07 (Released:2020-08-07)
参考文献数
24

A new nematode species, Rhabdias kiri sp. nov., which is a lung parasite in a microhylid frog Microhyla okinavensis Stejneger, 1901 from Ishigakijima island in the Yaeyama Islands of Ryukyu Archipelago, Japan is described and illustrated. This new species differs from other congeners inhabiting East Asia and the Russian Far East in its features: i.e., shorter body length, slender body shape, narrower and shallower buccal capsule, shorter head diameter and cuticular inflation less prominent in the anterior and middle parts of the body. This is the first record of a frog parasite in Rhabdias from the Yaeyama Islands. Partial sequences of mitochondrial cytochrome c oxidase subunit I and 12S rDNA genes were provided as DNA barcodes for the new species.
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
3

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
Keiichi Kakui Takafumi Nakano
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.179-180, 2019-07-25 (Released:2019-07-25)
参考文献数
15

The genus-group name Curtipleon Bǎcescu, 1976 is not available due to Bǎcescu’s failure to fix its type species in the original publication. This genus-group name should be attributed to Sieg (1983)—the work accidentally validated the genus-group name under Article 13 of the International Code of Zoological Nomenclature.
著者
Misako Urabe Takafumi Nakano
出版者
The Japanese Society of Systematic Zoology
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.23, no.2, pp.181-182, 2018-11-25 (Released:2018-11-25)
参考文献数
15

Tangenarchopsis nom. nov. is herein proposed for the digenean genus Tangiopsis Skrjabin and Guschanskaja, 1955 since the latter generic name is preoccupied by the hemipteran genus Tangiopsis Uhler, 1901.
著者
Takafumi Nakano
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.205-206, 2021-09-10 (Released:2021-09-10)
参考文献数
9

The spelling of the specific name monticolus in the scientific name of a spider, Cybaeus monticolus Kobayashi, 2006, does not violate any relevant provisions of the International Code of Zoological Nomenclature. This spelling is, therefore, the “correct original spelling” of the specific name under Article 32.2 of the Code. Regardless of whether this name is deemed an adjective or a noun in apposition, it should be maintained unaltered when it is combined with the generic name Cybaeus L. Koch, 1868, the gender of which is masculine. The later spelling monticola, as presented in the combination Cybaeus monticola in a recent arachnological treatise and then in an important online taxonomic resource from which its use appears to be spreading, is an “incorrect subsequent spelling” under Article 33.3 of the Code.
著者
Takafumi Nakano
出版者
The Japanese Society of Systematic Zoology
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.18, no.1, pp.99-103, 2013-05-25 (Released:2018-03-30)
参考文献数
16
被引用文献数
3 4

Two specimens of the large, predaceous salifid leech Mimobdella japonica Blanchard, 1897 were collected from Okinawajima island, Ryukyu Islands, Japan, representing the first record of this species from Okinawajima. A description is provided of the external and internal morphology of these specimens and two additional specimens of M. japonica from Amami-oshima island, also in the Ryukyu Islands. COI sequences showed no difference between the two specimens of M. japonica from Okinawajima and the two specimens from Amami-oshima (K2P distance=0%). This suggests that M. japonica is an introduced species in one or both of these islands.
著者
Ken-ichi Okumura Naoki Koike Takafumi Nakano
出版者
Arachnological Society of Japan
雑誌
Acta Arachnologica (ISSN:00015202)
巻号頁・発行日
vol.66, no.2, pp.73-78, 2017 (Released:2017-12-31)
参考文献数
24
被引用文献数
4

Taxonomic accounts of two species belonging to the subfamily Coelotinae from Japan are reviewed. Iwogumoa portus Nishikawa 2009 originally described from Osaka, Japan and Coelotes plancyi Simon 1880 described from Beijing, China are considered to be conspecific. Therefore the former is synonymized with the latter, and C. plancyi is transferred to the genus Iwogumoa Kishida 1955. Coelotes inabaensis Arita 1974 described from Tottori, Japan is placed under the genus Dichodactylus Okumura 2017.