- 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 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
- Takeshi Yamasaki Christine Rollard
- 出版者
- Arachnological Society of Japan
- 雑誌
- Acta Arachnologica (ISSN:00015202)
- 巻号頁・発行日
- vol.71, no.1, pp.49-51, 2022-06-30 (Released:2022-07-02)
- 被引用文献数
- 1
Sphecotypus taprobanicus Simon 1897 is redescribed on the basis of the holotype female. Although the specimen is at a subadult stage, the shape of the carapace distinguishes S. taprobanicus from other Asian Sphecotypus species.
- 著者
- Chinatsu Kawada Takushi Yoshida Hideto Yoshida Wakako Sakamoto Wataru Odanaka Toshihide Sato Takeshi Yamasaki Tomoyuki Kanemitsu Yasunobu Masuda Osamu Urushibata
- 出版者
- 日本酸化ストレス学会
- 雑誌
- Journal of Clinical Biochemistry and Nutrition (ISSN:09120009)
- 巻号頁・発行日
- vol.56, no.1, pp.66-73, 2015 (Released:2015-01-01)
- 参考文献数
- 36
- 被引用文献数
- 1 16
Hyaluronan (HA) has been increasingly used as a dietary supplement to improve the skin. However, the effect of ingested HA may depend on its molecular weight (MW) because its physiological activities in the body vary with its MW. In this study, we examined the effects of ingested HA with varying MW on the skin. In this randomized, double blind, placebo controlled study, 61 subjects with dry skin received oral HA (120 mg/day), of MWs 800 k and 300 k or placebo, for 6 weeks. The skin moisture contents of the first two groups increased more than those of the placebo group during the ingestion period. In addition, group HA 300 k exhibited significant improvements in skin moisture content 2 weeks after ingestion ended compared with the placebo group. A questionnaire survey about subjective facial aging symptoms showed that the HA treated groups exhibited significantly improved the skin condition compared with the placebo treated group. Furthermore, dermatologists objectively evaluated the clinical symptoms of the facial and whole body skin, showing that no adverse events were related to daily ingestion of HA. This study shows that both of ingesting HAs (MWs 800 k and 300 k) improved the skin condition by increasing the moisture content.