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Volume 36 (1988)
- Issue 2 Pages 79-
- Issue 1 Pages 1-
Volume 36, Issue 1
Displaying 1-4 of 4 articles from this issue
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A consideration in relation to the densities of spidersMakoto YOSHIDA1988Volume 36Issue 1 Pages 1-10
Published: 1988
Released on J-STAGE: March 29, 2007
JOURNAL FREE ACCESSAt a valley and a mountainside ca. 100m apart from each other, the kind and the individual number of spiders inhabiting both the areas and those intruding into the webs of N. clavata were investigated.
Sixty-eight species were collected by beeting and sweeping at both the areas, and ten species were collected from the webs of Nephila. Of these ten species, six were orb-weavers, and four were kleptoparasites. Several abundant species collected by beeting and sweeping were not found in Nephila's webs at all. The relative frequency of intrusion (the ratio of the individual number of intruders to that collected by beeting and sweeping) of the six orb-weavers was as high as that of the four kleptoparasites. So, the intrusion of these orb-weavers into Nephila's webs is not accidental. The aim of the intrusion seems to be prey-theft and/or the use of host web for the scaffold to make their webs.View full abstractDownload PDF (721K) -
GEETHABALI, Sulochana D. MORO1988Volume 36Issue 1 Pages 11-23
Published: 1988
Released on J-STAGE: March 29, 2007
JOURNAL FREE ACCESSThe distribution and external morphology of trichobothria in the whip scorpion, Thelyphonus indicus, and the scorpion, Heterometrus fulvipes, have been studied. While the whip scorpion has its trichobothria remarkably reduced in number to just 10 distributed on the tibiae of the legs, the scorpion has totally 96 trichobothria with 48 on each pedipalp. The sockets as well as hair shafts of the trichobothria on the antenniform legs of the whip scorpion differ widely in their appearance from those on the walking legs. The trichobothria of the scorpion resemble those on the antenniform legs of the whip scorpion, but differ due to the lamellated wall of the cup of the trichobothrium in the scorpion. The directions of mobilities of individual trichobothria in both the arachnids have also been mapped.View full abstractDownload PDF (1437K) -
Hajime YOSHIDA1988Volume 36Issue 1 Pages 25-31
Published: 1988
Released on J-STAGE: March 29, 2007
JOURNAL FREE ACCESSTwo new species belonging to the family Theridiidae are described from Japan under the names of Dipoena chikunii and D. okumae. D. caninotata BÖSENBERG et STRAND, 1906 is synonymized with Theridion subpallens BÖSENBERG et STRAND, 1906.View full abstractDownload PDF (2223K) -
I. THE GENUS PIRATA SUNDEVALLHozumi TANAKA1988Volume 36Issue 1 Pages 33-77
Published: 1988
Released on J-STAGE: March 29, 2007
JOURNAL FREE ACCESSThe following 13 species of the genus Pirata of Japan are dealt with: Pirata piraticus (CLERCK), P. subpiraticus (BÖSENBERG et STRAND), P. clercki (BÖSENBERG et STRAND), P. yaginumai TANAKA, P. piratoides (BÖSENBERG et STRAND), P. meridionalis TANAKA, P. boreus TANAKA, P. procurvus (BÖSENBERG et STRAND), P. tanakai BRIGNOLI, P. yesoensis TANAKA, P. hiroshii TANAKA, P. piratellus (STRAND), and P. knorrii (SCOPOLI). One species, P. piratellus, has not been collected since it was described originally in 1906. The other 12 species are redescribed in detail, with notes on their biology, and a key to them is provided. All of them live in wet habitats, i.e. around rivers, ponds and lakes, and under fallen leaves etc.View full abstractDownload PDF (3841K)
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