- 著者
- Shojiro Nagayama Keizo Takasuka
- 出版者
- Arachnological Society of Japan
- 雑誌
- Acta Arachnologica (ISSN:00015202)
- 巻号頁・発行日
- vol.70, no.2, pp.131-132, 2021-12-27 (Released:2021-12-30)
Pandiculation within spiders has only recently been discovered - the first record of this habit among Protostomia – and it has only been demonstrated in one species (Cyclosa argenteoalba). We report here four further araneoid species i.e. Argiope bruennichi, Cyrtophora ikomosanensis, Trichonephila clavata (all Araneidae), and Nihonhimea japonica (Theridiidae) exhibiting pandiculation in or on their own webs. These records suggest that pandiculation is widely distributed at least among the superfamily Araneoidea, members of which generally construct aerial webs and wait in ambush for a long period.
- 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
- 被引用文献数
- 1
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.