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

Ken-ichi Okumura Ren-Chung Cheng

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.72, no.1, pp.17-21, 2023-06-20 (Released:2023-07-01)

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A new synonymy of coelotine spider is proposed through a comparison of the morphological characteristics and the results of our molecular analysis. Coelotes hachijoensis Ono 2008, described on the basis of specimens from Hachijo Island, is a junior synonym of Coelotes oshimaensis Shimojana 2000. The original distribution of C. oshimaensis is considered to be on Amami-oshima Island and the Tokara Islands in southwestern Japan, far from Hachijo Island. Various circumstantial evidences suggested that C. oshimaensis on Hachijo Island may have been artificially introduced from Amami-oshima Island.

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 5

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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.

著者

Ken-ichi Okumura

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.69, no.2, pp.77-94, 2020-12-20 (Released:2020-12-24)

参考文献数

53

被引用文献数

5

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There are currently doubts about the correct genus of many Japanese species of coelotine spider provisionally classified in the genus Coelotes. Thus, taxonomic revisions were performed on 16 species with two retromarginal teeth on their chelicerae. Consequently, three new genera of the subfamily Coelotinae are described here. Aeolocoelotes gen. n. consists of seven species, which are characterized by extremely diverse variations in their genital organs and by the clear parapatric distributions among the congeneric species. Individuals in Aeolocoelotes gen. n. have large and dark-colored bodies, and females have a stiff chitinous epigyne. Curticoelotes gen. n. consists of six species, which are characterized by a short cymbium in the male palp. Finally, Griseidraconarius gen. n. consists of three species, which are characterized by their pale-colored bodies, spiraled conductors in the male palp, and tiny epigynal teeth.

著者

Yuya Suzuki Ken-ichi Okumura

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.72, no.2, pp.95-100, 2023-12-10 (Released:2023-12-10)

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A coelotine species, Femoracoelotes platnicki, previously known only from Taiwan, is newly recorded from Iriomote Island, southwest Japan. The genus Femoracoelotes is characterized by the presence of a palpal femoral apophysis, the absence of a median apophysis, the absence of epigynal teeth, and broad, saclike copulatory ducts connected or overlapped medially. The morphology of F. platnicki specimens collected from Taiwan, including the type specimens are reassessed. Morphological data including variation in male palpal morphology, coloration and markings are provided on the basis of fresh specimens from Iriomote Island.

著者

Ken-ichi Okumura Kazuyuki Honki Shin-ya Ohba

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.247-252, 2019-11-25 (Released:2019-11-25)

参考文献数

27

被引用文献数

2 1

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Iwogumoa songminjae (Paik and Yaginuma in Paik et al., 1969) is recorded for the first time from Japan on the basis of specimens collected in the Tsushima Islands, Kyushu and previously identified as I. insidiosa (L. Koch, 1878). The relationships among the Japanese species of Iwogumoa Kishida, 1955 are analyzed using mitochondrial cytochrome c oxidase subunit I with various Japanese species of Coelotes Blackwall, 1841 sensu lato as the outgroup. A new synonym is proposed through a comparison of morphological characteristics and the results of our molecular analysis: Coelotes iyoensis Nishikawa, 2009 (known only from the male) is a junior synonym of Coelotes mohrii Nishikawa, 2009 (known only from the female).

著者

Ken-ichi Okumura Hirotsugu Ono Yoshiaki Nishikawa

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.60, no.1, pp.47-50, 2011-09-30 (Released:2011-11-25)

参考文献数

6

被引用文献数

3 3

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Two new species of the genus Tegecoelotes are described from Chubu and Chugoku Districts, Honshu, Japan, under the names, Tegecoelotes chikunii n. sp. and Tegecoelotes hibaensis n. sp., respectively. Tegecoelotes chikunii found in Nagano and Gifu Prefectures is characterized by having extremely elongated femur and patella, short and bifurcate conductor, and extended tegulum in the male palp. Tegecoelotes hibaensis is distributed in Hiroshima, Okayama, Tottori and Shimane Prefectures, and is characterized by having elongated patella of the male palp and linguiform epigynal teeth in the female genitalia.