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

被引用文献数

1

---

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 5

---

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

Akio Tanikawa Takeshi Yamasaki Booppa Petcharad

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.70, no.2, pp.87-101, 2021-12-27 (Released:2021-12-30)

被引用文献数

1

---

Araneus is a large genus containing many species with various features, and phylogenetic analysis has revealed it to be a polyphyletic group. It has been proposed that nine new genera should be established independently from Araneus. One example is a group that includes Araneus mitificus (Simon 1886) and Araneus praesignis (L. Koch 1872). In this study, we examined specimens from several species that are morphologically similar to them, and confirmed their close relationship by phylogenetic analysis using the data of five genes. All targeted species were united in a monophyletic clade, comprising two groups in detail. The epigynes and male palps of the species in these two groups were clearly distinguishable; therefore, we concluded that they should be recognized as two independent genera. Consequently, we describe two new genera, Aoaraneus n. gen. and Bijoaraneus n. gen. Additionally, previously identified Japanese Araneus mitificus specimens were reexamined and concluded to be misidentified. It is described as a new species under the name Bijoaraneus komachi n. sp. in this study.

著者

Akio Tanikawa Yung-Hau Chang I-Min Tso

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.59, no.1, pp.31-38, 2010-09-30 (Released:2010-10-29)

参考文献数

42

被引用文献数

5 6

---

The Taiwanese and Japanese spiders which have been identified with Cyrtophora moluccensis (Doreshall 1857) are taxonomically revised. Three color morphs, yellow-, green-, and red-types, show their own discrete monophyletic clades in the phylogenetic tree inferred by Neighbor Joining method using the partial sequences of mt-16S-rRNA genes. P-distances within group means are 0.2% in the yellow-type, 0.1% in the green-type, and 0% in the red-type. P-distances between group means are 18.8% between yellow- and green-types, 19.4% between yellow- and red-types, 10% between green- and red-types. These three color morphs can be separated also by the shapes of epigynum and male palp. Consequently we recognize them as three independent nominal species and determined the yellow-type as C. cylindroides (Walckenaer 1842), the green-type as C. moluccensis (Doleschall 1857), and the red-type as C. ikomosanensis (Bösenberg & Strand 1906).

著者

三好 保徳

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.10, no.1-2, pp.1-8, 1947-03-20 (Released:2008-12-19)

被引用文献数

5 5

著者

Kandai Doi Fumiaki Yamasaki Takuya Kato Shin-ichi Hayama

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.70, no.1, pp.47-48, 2021-06-28 (Released:2021-07-05)

参考文献数

11

---

A pseudoscorpion was found in the underfur of a feral raccoon (Procyon lotor) captured in western Tokyo in December 2019. Based on the morphological features, we identified the specimen as Haplochernes sp. This arboreal pseudoscorpion rides other arthropods and small mammals for dispersion, but little is known that the species rides medium-sized mammals such as raccoons. To our knowledge, this is the first case report of Haplochernes sp. riding a feral raccoon. Given that raccoons are an invasive species in Japan, further records of pseudoscorpions riding feral raccoons may elucidate the relationship between feral raccoons and pseudoscorpions.

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.

著者

Akio Tanikawa

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.66, no.1, pp.1-4, 2017-08-31 (Released:2017-09-11)

参考文献数

5

被引用文献数

1

---

A new araneid species Zygiella hiramatsui n. sp. is described using specimens obtained from Amami-ôshima Island, Japan. This species can be distinguished from allied Z. dispar by the much wider median area of the epigyne, or an unnamed apophysis neighboring the embolus that is short and truncated and a horn shaped apophysis of the tegulum in the male palp. It is uncommon for Zygiella spiders to inhabit subtropical regions, but this is the case for Z. hiramatsui n. sp. So it might be introduced previously into Amami-ôshima Is. from unknown habitat.

著者

佐藤 英文

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.28, no.1, pp.31-37, 1978 (Released:2007-03-29)

参考文献数

7

被引用文献数

1

---

樹上生活性カニムシであるトゲヤドリカニムシ Haplochernes boncicus KARSCH の生活場所および生活史について調査し, 以下に示すような結果が得られた。1) 本種はスギ, ヒノキ, ときにはアカマツなどの乾燥した樹皮下に生息する。他の昆虫などに食害された樹皮よりも清潔で滑らかな樹皮の間隙に多い。老木の方が若木よりも好まれる。2) 寿命は4年あるいは5年以上と推定され, 第一若虫から第三若虫までは各一年, 成虫は1, 2年あるいはそれ以上生きるものと推測される。3) 脱皮時期は7~8月である。縦に長く横に短かい楕円形の巣の中で脱皮する。4) 繁殖期は7~8月である。抱卵雌は営巣せず, 巣にかわるものとして糸を敷きつめた“抱卵床 (brood-bed)” をつくる。抱卵床の大きさは平均して長径6.47mm短径3.98mmであった。雌1個体の産卵数は平均12-13個体であった。

著者

Alexander M. Kerr

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.72, no.1, pp.39-48, 2023-06-20 (Released:2023-07-01)

---

Spiders in the genus Cyrtophora Simon, 1864 often incorporate debris and egg sacs in their webs. Based on a survey of online digital imagery, I report here that at least three species in this genus also include silk decorations: C. cylindroides (Walckenaer 1841), C. ikomosanensis (Bösenberg & Strand 1906), and C. moluccensis (Doleschall 1857). These species lay single to multiple zigzagging silk strips in an arcuate, looping, or spiral pattern often centred about the web’s hub. However, small juveniles and males installed scattered floc-like silk in the barrier strands below the web. The most commonly observed decorator, C. moluccensis, displayed the devices in only 13.9% of observed webs (n = 465), lower than most other silk-decorating spiders. The discovery of novel spider behaviour and web structure is considerably aided by online databases of natural-history observations.

著者

John T. D. Caleb Dilrukshan P. Wijesinghe

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.71, no.1, pp.13-20, 2022-06-30 (Released:2022-07-02)

被引用文献数

1

---

The types of four Oxyopes species kept in the British Musuem (Natural History), London and the National Zoological collection, Zoological Survey of India (Kolkata) are reexamined. Three new synonyms are recognized: Oxyopes nilgiricus Sherriffs 1955 syn. nov., O. pankaji Gajbe & Gajbe 2000 syn. nov. and O. ratnae Tikader 1970 syn. nov. with O. hindostanicus Pocock 1901. The updated distribution of O. hindostanicus is mapped with records from several new localities from India and Sri Lanka.

著者

田中 幸一

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.41, no.1, pp.91-101, 1992 (Released:2007-03-29)

参考文献数

34

被引用文献数

6 5

---

名古屋市におけるクサグモの生活史を調査した. クサグモは年1世代であった. 1齢幼体は3月下旬から4月上旬に卵嚢から出現し, 成体になるまでに6回の脱皮を行った. 雌雄は同時期に成体になり, 産卵は8月中下旬にみられた. ほとんどの網は, ヒサカキ, ネズミモチ, ツゲなど硬く小さい葉が密生した木に造られた. 雌当たり産卵数は, 雌の体サイズ, 特に産卵直前の体重と正の相関があった. クモの体サイズと産卵数を2つの生息地すなわち開けた場所と雑木林の間で比較した. 開けた場所の成体のサイズおよび産卵数は, 雑木林の個体に比べて有意に小さかった. これは, 開けた場所の生息地では餌供給が制限されているためであると考えられた.

著者

宮下 直

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.40, no.1, pp.17-21, 1991 (Released:2007-03-29)

参考文献数

10

被引用文献数

14 16

---

ジョロウグモを野外網室内で3つの異なる条件下で飼育し, 成長経過を調べた. 餌供給量の違いは, 成長速度やサイズに強い影響を与えた. 野外における3つの個体群の平均サイズの変異は大きかったが, いずれも飼育下におけるサイズの範囲内にあった. これらの結果は, 野外個体群における餌資源の制約とともに, 成長過程の可塑性を示すものである.

著者

Akio Tanikawa Tadashi Miyashita

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.57, no.1, pp.19-35, 2008-07-31 (Released:2008-11-25)

参考文献数

28

被引用文献数

3 5

---

Japanese spiders of the genus Dolomedes are revised and its phylogeny is inferred by mt-DNA. Dolomedes japonicus Bösenberg & Strand 1906 and D. angustivirgatus Kishida 1936 are removed from the synonymy. Dolomedes fimbriatoides Bösenberg & Strand 1906 and D. hinoi Kayashima 1952 are newly synonymized with D. sulfureus L. Koch 1878, and D. stellatus Kishida 1936 is synonimized with D. japonicus. Two new species, D. fontus and D. silvicola are described. Relative leg length and proportion of male palpal tibia are considered as good keys to indentify Dolomedes spiders, whose genital organs closely resemble one another. Dolomedes sulfureus and D. silvicola, often found on vegetation, have much longer legs and male palpal tibia than their relatives that inhabit near water and run on water surface or hide under water when disturbed. Molecular phylogenetic analysis using mt-COI revealed the following; ((((raptor, yawatai), japonica), orion), (((angustivirgatus, sulfureus), fontus), (silvicola, saganus)), horishanus).

著者

吉田 真

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.35, no.1, pp.35-40, 1986 (Released:2007-03-29)

参考文献数

5

被引用文献数

3 2

---

山地渓流上に張られたジョロウグモの網に円網を張るクモ3種が侵入し, その中に自分の網を張って餌を捕らえたり, 宿主の網にかかっている餌を盗んでいた。これらの種の侵入の目的を, 宿主の網での餌盗みと造網足場としての宿主の網 (とくに迷網) の利用の, 2点から考察した。

著者

藤井 靖浩

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.46, no.1, pp.5-18, 1997 (Released:2007-03-29)

参考文献数

40

被引用文献数

4 4

---

関東平野北西部にすむコモリグモ類の日周期活動と生活場所における種間の相違を落し穴トラップで調べた. オオアシコモリグモ属の種 (ウヅキ, イナダハリゲ, クサチハリゲ) はいずれも昼間にだけ捕獲された. また, ナミは昼間に, イモは夜間にやや多く捕獲された. しかしフジイ, クラーク, チビ, コガタ, ヒノマルの捕獲頻度は昼夜ともほぼ同様であった. コモリグモ類の生活場所は3つの環境要素の質や段階, すなわち, 底質 (B, むきだしの土壊; L, 生きた植物体; D, 死んだ植物体), 光の条件 (s,日向; d, 日陰), 水の条件 (0, 雨水のみ; 1, 止水; 2, 流水) の組み合わせで分類された. どの種も3っ以上の生活場所に出現し, ウヅキはBs0, クサチハリゲとアライトはLs0, クラークはLs1, イナダハリゲ, イモ, ナミはLs2, チビとコガタはDs0, エビチャとヒノマルはDs1, フジイはDd0で, それぞれの最高頻度を示したが, 生きた植物の上層部ではまれだった. 調査区内にすむ他の7種 (スジブト, カガリビ, クロコ, ハラクロ, キクヅキ, キシベ, キバラ) は低密度ないし低移動性のため, ほとんどないしまったく捕獲されなかった. 日周期性や生活場所に関するこれらの傾向において, ステージや性による相違は不明瞭であった.

著者

Akio Tanikawa

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.54, no.1, pp.23-30, 2005 (Released:2006-05-19)

参考文献数

24

被引用文献数

6 6

---

The Japanese spiders of the genus Agelena are revised. The occurrence of A. limbata Thorell 1897, A. opulenta Koch 1878, and A. labylinthica (Clerck 1757) are recomfirmed. A. donggukensis Kim 1996 is newly recorded from Japan and the male of the species is described for the first time. A new species, A. babai, is described based on the specimens collected from Amami-ôshima Is. of the Ryukyus.

著者

Peter Jäger Joseph K. H. Koh

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.60, no.1, pp.55-56, 2011-09-30 (Released:2011-11-25)

参考文献数

6

被引用文献数

1

---

Rhitymna ingens Simon 1897, type species of the genus Rhitymna Simon 1897 is recognized as junior synonym of Rhitymna pinangensis (Thorell 1891). Evidences of similar morphology and body size as well as syntopic occurrence was finally completed by the observation of a mating couple in the forest in Sarawak, Malaysia. The species is firstly recorded from Brunei.

著者

Yuki G. Baba Tatsumi Suguro Noriaki Naya Takeo Yamauchi

出版者

Arachnological Society of Japan

雑誌

Acta Arachnologica (ISSN:00015202)

巻号頁・発行日

vol.65, no.1, pp.11-13, 2016-08-31 (Released:2016-11-02)

参考文献数

13

被引用文献数

1 3

---

We report the occurrence of a gynandromorph of the funnel-web spider Allagelena opulenta collected by a Malaise trap set in a Japanese cedar plantation on Mt. Aikodake, Yakushima Island, Japan. This specimen presents a transverse gynandry, with the anterior half of the body male and the posterior one female. The epigyne is abnormally developed, and the shape of the epigynal opening is deformed compared to that in normal females. This is the first case of gynandromorphy observed in this genus.