著者
Tatsumi Suguro
出版者
Arachnological Society of Japan
雑誌
Acta Arachnologica (ISSN:00015202)
巻号頁・発行日
vol.69, no.1, pp.55-60, 2020-06-20 (Released:2020-06-20)
参考文献数
4

At present, only one Stertinius species, S. kumadai Logunov, Ikeda & Ono 1997, is known from Japan. In this paper, a new species, S. ryukyuensis sp. nov., is described and compared with S. kumadai, which is redescribed. Despite similarities in general appearance, the two species can be separated based on the morphology of retrolateral tibial apophysis and male cheliceral teeth, as well as the position of large spermathecal chamber.
著者
Tatsumi Suguro
出版者
Arachnological Society of Japan
雑誌
Acta Arachnologica (ISSN:00015202)
巻号頁・発行日
vol.69, no.1, pp.23-25, 2020-06-20 (Released:2020-06-20)
参考文献数
4

A thomisid species, Lycopus longissimus Tang & Li 2010, is newly recorded in Japan. The genus Lycopus is also new to Japan, and L. longissimus is the only Japanese species at present.
著者
Tatsumi Suguro Yuki G. Baba Takeo Yamauchi
出版者
Arachnological Society of Japan
雑誌
Acta Arachnologica (ISSN:00015202)
巻号頁・発行日
vol.67, no.1, pp.19-21, 2018-08-31 (Released:2018-09-05)
参考文献数
11

A phrurolithid spider species, Phrurolithus splendidus Song & Zheng 1992, is newly recorded from Japan. This species resembles P. pennatus, but can be distinguished from the latter by male tibial apophysis with thin finger-shaped apex, and spermathecae located behind openings.
著者
Yuya Suzuki Ryohei Serita Takehisa Hiramatsu
出版者
Arachnological Society of Japan
雑誌
Acta Arachnologica (ISSN:00015202)
巻号頁・発行日
vol.69, no.2, pp.133-150, 2020-12-20 (Released:2020-12-24)
参考文献数
16

Japanese spiders of the genus Theridiosoma (Araneae: Theridiosomatidae) were revised with redescription of T. epeiroides Bösenberg & Strand 1906 and description of four new species, namely: T. dissimulatum sp. nov., T. paludicolum sp. nov., T. fulvum sp. nov., and T. alboannulatum sp. nov. The internal morphology of the female genitalia of T. epeiroides is illustrated in this study for the first time. Males of the new species can be distinguished from their congeners by the morphology of the embolic apophyses or the posterior edge of the embolic division on the male palp. Females of the former three species can be differentiated from their related species by the shape of the contour formed by interior edges of a pair of sclerotized processes on the posterior edge of the genital plate. The latter species can be distinguished from the allied species by the angular lateral corners of the genital plate and overall shape of the genitalia (longer than wide).
著者
Hiroyuki Iida Hideo Hasegawa
出版者
Arachnological Society of Japan
雑誌
Acta Arachnologica (ISSN:00015202)
巻号頁・発行日
vol.52, no.2, pp.77-78, 2003 (Released:2007-03-29)
参考文献数
9
被引用文献数
3 3

Juveniles of a nematode belonging to the family Mermithidae were found from wolf spiders, Pardosa pseudoannulata, collected in a paddy field in Kyoto, Japan. Their morphological characteristics are briefly reported along with some ecological notes. This is the first record of a mermithid from P. pseudoannulata.
著者
Keizo Takasuka
出版者
Arachnological Society of Japan
雑誌
Acta Arachnologica (ISSN:00015202)
巻号頁・発行日
vol.68, no.2, pp.77-80, 2019-12-20 (Released:2019-12-29)
参考文献数
30

Parasitism by the ichneumonid ectoparasitoid, Brachyzapus nikkoensis, on the agelenid spider, Allagelena opulenta is recorded for the second time with the first voucher specimen. The attacked host was an adult in contrast to the exclusive utilization of juveniles of the main host, Agelena silvatica. All published records of parasitism upon Agelena silvatica are from spring to early summer, and therefore this finding of parasitism in the end of September, would be consistent with B. nikkoensis shifting its hosts in accordance with their body size, seasonal prevalence and their availability, as previously suggested.
著者
井原 庸
出版者
日本蜘蛛学会
雑誌
Acta Arachnologica (ISSN:00015202)
巻号頁・発行日
vol.57, no.2, pp.87-109, 2008-12-31 (Released:2009-02-10)
参考文献数
28
被引用文献数
1

ナミハグモ属の種多様性には,著しい地理的種分化と,体サイズの分化による同所的な種の組み合わせという2つの側面がある. 日本から70種以上が記録されているが,まだ多くの未記載種が残されている.ナガトナミハグモ種群は生殖器の形態に著しい地理的分化を示し,種内の複雑な地理的変異,環状重複,近縁種の側所的分布や同所的共存といった異所的種分化のさまざまな過程がみられた.また,体サイズは種分化とその後の同所的共存に重要な役割を果たすと考えられ,カチドキナミハグモ種群では体サイズの分化が種分化を促進した可能性がある.
著者
Yusuke Shigemiya Kensuke Nakata
出版者
Arachnological Society of Japan
雑誌
Acta Arachnologica (ISSN:00015202)
巻号頁・発行日
vol.64, no.2, pp.75-81, 2015-12-31 (Released:2016-01-02)
参考文献数
15

Rearing of animals from one generation to the next is important in many biological studies. In this study, we aimed to develop efficient methods for rearing multiple generations of orb-web spiders (Cyclosa argenteoalba), testing three methods. First, we examined isolated rearing with aphid supplied by hand. Second, we tested mass rearing. We also collected various insect species from the field using light trap and supplied them by hand. Both methods failed, perhaps because of the inappropriate aphid (Uroleucon formosanum) and insufficient quantity of prey supplied in the first and second tests, respectively. For the third method, we mass reared with abundant prey directly supplied from light traps into the terrariums located outside. This method successfully raised hatchlings to adults, and the eggs produced from these adults also matured. The development time of wintering and non-wintering cohorts was 150.2‐195.0 days and 24.0‐76.3 days, respectively.
著者
山﨑 健史
出版者
日本蜘蛛学会
雑誌
Acta Arachnologica (ISSN:00015202)
巻号頁・発行日
vol.64, no.1, pp.49-56, 2015 (Released:2015-12-02)
参考文献数
38
著者
新海 明 新海 栄一
出版者
Arachnological Society of Japan
雑誌
Acta Arachnologica (ISSN:00015202)
巻号頁・発行日
vol.51, no.2, pp.149-154, 2002 (Released:2007-03-29)
参考文献数
17
被引用文献数
3 3

ムツトゲイセキグモは日本にいる稀産の2種のナゲナワグモ類のうちのひとつである. 本報告は, 野外におけるムツトゲイセキグモの生活史, 若令幼体がもちいる餌捕獲法, および本種のメス成体や亜成体がもちいる「投げ縄」網の作成行動についてのはじあての観察記録である. ムツトゲイセキグモは年一世代の多回 (3-6回) 産卵のクモであり, ふ化した幼体は卵のう内でそのまま越冬した. 若令幼体とオスは投げ縄を使わず, 葉の縁で狩りをしていると考えられた. 亜成体と成体のメスは蛾を捕獲するために投げ縄を使用した. 投げ縄作成行動は, 投げ縄を第1脚のかわりに第2脚でもつ以外はナゲナワグモ属のものとまったく同一だった. ときどき, 2個の粘球がついた投げ縄を作ることがあった.
著者
新海 明
出版者
Arachnological Society of Japan
雑誌
Acta Arachnologica (ISSN:00015202)
巻号頁・発行日
vol.34, no.1, pp.11-22, 1985 (Released:2007-03-29)
参考文献数
20
被引用文献数
2 1

ジョロウグモとオオジョロウグモの網構造を比較した。両種の幼体の網は barrier web (迷網) の形状を除き同じ構造であり, その主網は普通の円網に似ていた。一方, 両種の雌成体の網にはいくつかの点で違いがみられた。すなわち, ジョロウグモの網はオオジョロウグモにくらべて非相称性がより強く, ジョロウグモの網には分枝•二分割糸•迷網が認められた。しかし, オオジョロウグモでは二分割糸と迷網は認められなかったが分枝は存在していた。そして, これらの違いからジョロウグモの方がオオジョロウグモに比較してより特殊化しており, ジョロウグモ属のクモは円網を張っていたクモを祖先として, それから派生してきたと考えられた。
著者
Yuya Suzuki
出版者
Arachnological Society of Japan
雑誌
Acta Arachnologica (ISSN:00015202)
巻号頁・発行日
vol.68, no.2, pp.59-62, 2019-12-20 (Released:2019-12-29)
参考文献数
6

A new species of the genus Wendilgarda is described as Wendilgarda ruficeps sp. nov. from Japan. Both sexes of this species possess a bicolor body: prosoma reddish orange and opithosoma dark grey, which is useful for distinction from other congeners. The male palpal morphology of this species is similar to that of W. sinensis and W. muji, but can clearly be distinguished by the serrated edge on the posterior side of the median apophysis. The female epigyne of this species is similar to that of W. sinensis; however, it shows the smaller invagination on the posterior margin of the epigyne and the wider scape.
著者
Shinji Suzuki Nobuo Tsurusaki Yoshinori Kodama
出版者
Arachnological Society of Japan
雑誌
Acta Arachnologica (ISSN:00015202)
巻号頁・発行日
vol.55, no.2, pp.79-86, 2006 (Released:2007-04-10)
参考文献数
28
被引用文献数
2 3

We surveyed habitats of an endangered burrowing wolf spider Lycosa ishikariana (Saito 1934) along the San'in coast of Tottori and Shimane Prefectures, southwestern Honshu, Japan. The species was found from eight sites covering seven different beaches from Inasa Beach (Izumo City) in the east to Toda Beach (Masuda City) in the west in Shimane Prefecture for the first time. This extends the southwestern limit of the species' range ca. 160 km westward from the Yumigahama Beach of Tottori Prefecture, the present southernmost record. In the coast of Tottori Prefecture, the species was found from 17 sites that exceed known number of records in the area. The apparent increase of the number of habitats of the species in Tottori Prefecture is probably due to a shift of survey season from the mid summer to June when density of the burrows culminates by the recruit of newly hatched spiderlings. Simple logistic regression analyses suggested that presence/absence of the species is related to any of the sand grain sizes, sorting indices, areas, lengths and maximum widths of the sandy beaches, though a multiple logistic regression analysis revealed that beach areas and sand grain size were the most significant factors. According to the models obtained, requirements for the occurrence of species were estimated to be areas>0.0313 km2 (total length>985 m, width>60 m) of sandy beach, and sand grain diameter>0.33 mm.
著者
Yuya Suzuki Booppa Petcharad Thanakorn Into Akio Tanikawa
出版者
Arachnological Society of Japan
雑誌
Acta Arachnologica (ISSN:00015202)
巻号頁・発行日
vol.69, no.2, pp.75-76, 2020-12-20 (Released:2020-12-24)
参考文献数
18

In this short paper, we report the predation of an orb-weaving spider Neoscona sp. (Araneae: Araneidae) by a corinnid sac spider Corinnomma severum (Araneae: Corinnidae) from Thailand. To the best of our knowledge, this is the first report of predation of web-building spider by a spider of the genus Corinnomma observed in the field.
著者
Akio Tanikawa Takeshi Yamasaki
出版者
Arachnological Society of Japan
雑誌
Acta Arachnologica (ISSN:00015202)
巻号頁・発行日
vol.68, no.1, pp.11-13, 2019-06-30 (Released:2019-07-12)
参考文献数
19

Anepsion japonicum (Bösenberg & Strand 1906) is newly synonymized with A. maritatum (O.Pickard-Cambridge 1877) by examining the type specimens.