Acta Arachnologica

Notes on the Japanese Species of the Genera Tapinopa and Floronia

Arachnida: Araneae: Linyphiidae: Micronetinae

Michael I. SAARISTO

1996 Volume 45 Issue 1 Pages 1-6
Published: 1996
Released on J-STAGE: March 29, 2007

DOIhttps://doi.org/10.2476/asjaa.45.1

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It is shown in this study that the two linyphiids currently determined in Japan as Tapinopa longidens (WIDER, 1851) and Floronia bucculenta (CLERCK, 1758) are not conspecific with the European ones but represent different taxa, viz. Tapinopa guttata KOMATSU, 1937, sp. rev.=Tapinopa octodenta WUNDERLICH, 1995, n. syn. and Floronia exornata (L. KOCH, 1878) sp. rev., respectively.

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Roncus yaginumai, a New Pseudoscorpion from Montenegro, Yugoslavia (Pseudoscorpiones: Neobisiidae)

Bozidar P. M. CURCIC, Srecko B. CURCIC, Rajko N. DIMITRIJEVIC

1996 Volume 45 Issue 1 Pages 7-12
Published: 1996
Released on J-STAGE: March 29, 2007

DOIhttps://doi.org/10.2476/asjaa.45.7

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A new cave-dwelling species, Roncus yaginumai CURCIC, CURCIC et DIMITRIJEVIC sp. nov., (Neobisiidae: Pseudoscorpiones) is described from southern Montenegro, Yugoslavia. It is illustrated and compared with its phenetically close congener, R. vulcanius BEIER, from south Hercegovina, Bosnia-Hercegovina. Notes are given on the habitat, distribution and teratology of this endemic species.

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A Newly Recorded Spider from Taiwan, Paraplectana tsushimensis YAMAGUCHI, 1960 (Araneae: Araneidae)

Yung-Hau CHANG

1996 Volume 45 Issue 1 Pages 13-14
Published: 1996
Released on J-STAGE: March 29, 2007

DOIhttps://doi.org/10.2476/asjaa.45.13

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One specimen of Paraplectana tsushimensis YAMAGUCHI (Araneae: Araneidae), was recently found in Taichung County, Taiwan. This is not only the new record of the species but also that of the genus in Taiwan.

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A Rare Species of the Spider, Steatoda phalerata (PANZER, 1801) from Korea (Araneae: Theridiidae)

Joon NAMKUNG, Moon-Soon IM, Seung-Tae KIM

1996 Volume 45 Issue 1 Pages 15-18
Published: 1996
Released on J-STAGE: March 29, 2007

DOIhttps://doi.org/10.2476/asjaa.45.15

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A rare species of spider for the Korean fauna, Steatoda phalerata (PANZER, 1801), is reported. A male of the spider collected from Daechon-si, Chungchongnam-do, Korea is described and illustrated. The specieis is recorded from Korea for the first time.

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New Records of Two Korean Species of the Spider Families Mimetidae and Thomisidae (Araneae) from Japan

Hirotsugu ONO

1996 Volume 45 Issue 1 Pages 19-24
Published: 1996
Released on J-STAGE: March 29, 2007

DOIhttps://doi.org/10.2476/asjaa.45.19

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Two species of spiders of the families Mimetidae and Thomisidae originally described from Korea are newly recorded from Japan, that is, Ero koreana PAIK 1967, and Oxyptila nongae PAIK, 1974. The discovery of the former species at Yokohama is probably caused by cargo transportation, while the records of the latter species widely spread in Honshu depend on the natural distribution.

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Japanese Salticid Spiders of the Genera Euophrys C. L. KOCH and Talavera PECKHAM et PECKHAM (Araneae: Salticidae)

Hiroyoshi IKEDA

1996 Volume 45 Issue 1 Pages 25-41
Published: 1996
Released on J-STAGE: March 29, 2007

DOIhttps://doi.org/10.2476/asjaa.45.25

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Japanese salticid spiders of the genera Euophrys C. L. KOCH, 1834, and Talavera PECKHAM et PECKHAM, 1909, are revised. After an examination of many specimens from Japan, four species of the genus Euophrys were recognized, that is, Euophrys erratica (WALCKENAER, 1825), E. iwatensis BOHDANOWICZ et PRÓSZYNSKI, 1987, E. frontalis (WALCKENAER, 1802) and E. kataokai sp. nov. One species of the genus Talavera, T. trivittata (SCHENKEL, 1963) was recognized. All the species are described and illustrated.

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Further Report on Nematode-pseudoscorpion Associations

Bozidar P. M. CURCIC, Rajko N. DIMITRIJEVIC, Slobodan E. MAKAROV, Luka ...

1996 Volume 45 Issue 1 Pages 43-46
Published: 1996
Released on J-STAGE: March 29, 2007

DOIhttps://doi.org/10.2476/asjaa.45.43

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Nematode-pseudoscorpion associations were studied in Neobisium bernardi VACHON, N. carpaticum BEIER, N. simoni (L. KOCH), N. sylvaticum (C. L. KOCH), and Roncus jarilo CURCIC, all from Yugoslavia. Mermithid parasitism of pseudoscorpions was re-established for N. carpaticum and R. pannonius CURCIC, DIMITRIJEVIC, et KARAMATA (Neobisiidae). Phoretic associations of rhabditid nematodes and false scorpions were found in R. jarilo and re-established in N. carpaticum. The possible origin of such associations, their characteristics, frequency, and significance are briefly discussed. The total number of pseudoscorpion species associated with nematodes, is at present 15; of these, the majority belong to the family Neobisiidae (11 species), while 3 species belong to the Chthoniidae, and one to the Sternophoridae.

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New Records of Argyrodes flavescens (Araneae: Theridiidae) from Japan

Akio TANIKAWA, Takafumi CHIDA, Ken-ichi KUMADA

1996 Volume 45 Issue 1 Pages 47-52
Published: 1996
Released on J-STAGE: March 29, 2007

DOIhttps://doi.org/10.2476/asjaa.45.47

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Argyrodes flavescens O. PICKARD-CAMBRIDGE, 1880 is newly recorded from Japan. The species closely resembles A. miniaceus (DOLESCHALL, 1857), but can be distinguished from the latter by the structure of female genitalia and the shape of embolus of male pale.

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Spiders of the Genus Oxyopes LATREILLE (Araneae: Oxyopidae) of Buxa Tiger Reserve, West Bengal

Vivekanand BISWAS, Biswajit KUNDU, Madhuchhanda KUNDU, Sumana SAHA, Di ...

1996 Volume 45 Issue 1 Pages 53-61
Published: 1996
Released on J-STAGE: March 29, 2007

DOIhttps://doi.org/10.2476/asjaa.45.53

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Five new species of the genus Oxyopes (Araneae: Oxyopidae), O. elongatus n. sp., O. minutus n. sp., O. ovatus n. sp., O. reticulatus n. sp. and O. subimali n. sp. are recorded from Buxa Tiger Reserve, West Bengal, India. A total of 9 Oxyopes species are reported from the area.

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The Spider Family Clubionidae (Arachnida: Araneae) from the Krakatau Islands, Indonesia

Toshio HAYASHI

1996 Volume 45 Issue 1 Pages 63-72
Published: 1996
Released on J-STAGE: March 29, 2007

DOIhttps://doi.org/10.2476/asjaa.45.63

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Spider specimens of the family Clubionidae taken from the Krakatau Islands, Indonesia, are classified into four species, that is, two known species, Cheiracanthium longipes THORELL, 1890, and Clubiona melanosticta THORELL, 1890, and two new species, Clubiona nentwigi sp. nov. and Cl. sertungensis sp. nov.

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The Ocular Anomaly in a Ground Spider (Araneae: Gnaphosidae) from Japan

Hirotsugu ONO, Yasue KUDO

1996 Volume 45 Issue 1 Pages 73-75
Published: 1996
Released on J-STAGE: March 29, 2007

DOIhttps://doi.org/10.2476/asjaa.45.73

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The ocular anomaly in a Japanese ground spider is reported. The spider is identified with Gnaphosa primorica OVTSHARENKO, PLATNICK et SONG, 1992, described from the Russian Far East. It is recorded for the first time in Japan. The anomalous individual has only two eyes; these are regarded as the right anterior lateral and posterior lateral eyes.

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The First Record of Tenuiala nuda EWING from Japan and Its Redescription

Ichiro MARUYAMA, Jun-ichi AOKI

1996 Volume 45 Issue 1 Pages 77-80
Published: 1996
Released on J-STAGE: March 29, 2007

DOIhttps://doi.org/10.2476/asjaa.45.77

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A North American species of oribatid mites, Tenuiala nuda EWING, was found from the forest soil in Niigata Prefecture, Central Japan. This is the frist record of the genus Tenuiala and T. nuda from Japan. The species was described in detail on the material from Japan.

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Inter- and intraspecific competition in web-building spiders

Tadashi MIYASHITA

1996 Volume 45 Issue 1 Pages 81-88
Published: 1996
Released on J-STAGE: March 29, 2007

DOIhttps://doi.org/10.2476/asjaa.45.81

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This paper reviews inter- and intraspecific competition in web-building spiders in the field. Although interspecific competition was thought to be important in spider communities, recent field experiments have revealed that it is infrequent. Intraspecific competition is also not common at the population level. Possible reasons for the absence of competition in spider populations are discussed.

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Nymphal development and egg production of Menemerus confusus BOESENBERG et STRAND

Kazuyoshi MIYASHITA

1996 Volume 45 Issue 1 Pages 89-93
Published: 1996
Released on J-STAGE: March 29, 2007

DOIhttps://doi.org/10.2476/asjaa.45.89

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Nymphal development and egg production of Menemerus confusus BOES. et STR. were investigated under seminatural rearing conditions. Eight 2nd instar nymphs emerged from mother's nest web in summer. Of these, four nymphs developed to male adults by the summer of the following year, while one nymphs did so in the 3rd year. The number of molts required for maturity was 5. The other 3 nymphs developed to female adults in the summer of the 3rd year, and the number of molts required was 6. Six adult females collected from field in late spring lived for 3 years, except one died in the autumn of the 2nd year. Egg production was repeated 4-5 times by early September of the 2nd year, but 2 among them produced eggs once more in the spring of the 3rd year. The mean ± S.D. of egg number per oviposition was calculated to be 24.4±4.2 for the 1st, 17.8±2.1 for the 2nd, 14.3±3.2 for the 3rd, 12.2±5.5 for the 4th, and 12.7±1.5 for the 5th oviposition. The total egg number produced per female in life was 71.7±18.6 (mean ± S.D.).

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Prey composition of three Dipoena species (Araneae: Theridiidae) specializing on ants

Yasuka UMEDA, Akira SHINKAI, Tadashi MIYASHITA

1996 Volume 45 Issue 1 Pages 95-99
Published: 1996
Released on J-STAGE: March 29, 2007

DOIhttps://doi.org/10.2476/asjaa.45.95

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We examined species and size compositions of prey in the three Dipoena spiders specializing on ants. Dipoena punctisparsa fed exclusively on small ants, Lasius. In this spider, the number of prey fed at a time increased with the spider body size. Dipoena castrata mainly captured Componotus and Lasius, and most spiders fed on a single prey. The body size of prey fed upon by this species increased with the spider size. Dipoena mustelina captured a variety of ant species, ranging from very small to large ones.

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