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山﨑 健史

Takeshi Yamasaki

基本情報

所属
兵庫県立大学 自然・環境科学研究所 准教授
学位
博士(理学)(2012年3月 鹿児島大学)

J-GLOBAL ID
201801021323402871
researchmap会員ID
B000331187

委員歴

 6

受賞

 1

論文

 33
  • Luong Thi Hong Phung, Yong‐Chao Su, Takeshi Yamasaki, Yi‐Yen Li, Katsuyuki Eguchi
    Ecology and Evolution 14(3) 2024年3月12日  査読有り
    Abstract Salticidae (jumping spiders) usually exhibit pronounced sexual dimorphism in adult morphology, particularly body coloration and size and shape of the first legs. Consequently, the male and female from the same species might be erroneously assigned to different species or even different genera, which could generate synonymies in classification if only morphological data were used. Phintella is a species‐rich genus of Salticidae, which currently exhibits 76 named species. However, the male–female counterpart is unknown for nearly half of the species. In this study, we used a molecular approach to delineate the species boundaries for Phintella and Phintella‐like specimens collected in Vietnam, using morphological information as supporting data. We used three gene fragments (mitochondrial COI, 16S‐ND1, and nuclear 28S) and biogeographical considerations for species delimitation. A total of 22 putative species were recognized: 18 species of the genus Phintella, one species of the genus Lechia (L. squamata), and three species of the genus Phinteloides. Eleven undescribed species were discovered, of which seven have a male–female combination, two species have only males, and two species have only females. The crown age of Phintella was estimated at the Serravallian stage of the Miocene after the increase of species number around 16 MYA. The crown ages of most putative species recognized in this study were estimated in the Pleistocene, and the divergence among sister species likely occurred from the mid‐Miocene to the Pliocene. Our ancestral range reconstruction results showed that the diversification of our ingroup was governed by progressive dispersal events, i.e., Phintella and their related species in Vietnam diversified while expanding their range on the continent. Our results provide fundamental biodiversity data for a high‐diversity genus in Vietnamese Phintella spiders.
  • Siddharth S. Kulkarni, Takeshi Yamasaki, Luong Thi Hong Phung, Nanguei Karuaera, Savel R. Daniels, Efrat Gavish-Regev, Prashant P. Sharma
    Molecular Phylogenetics and Evolution 191 107989-107989 2024年2月  査読有り
  • TAKESHI YAMASAKI, YOSHIAKI HASHIMOTO, TOMOJI ENDO, FUJIO HYODO, TAKAO ITIOKA, MARYATI MOHAMED, PAULUS MELENG
    Zootaxa 5343(1) 55-73 2023年9月6日  査読有り
    The genus Utivarachna Kishida, 1940 currently comprises 23 species, with eight described from Borneo. We examined the type materials of the Bornean species, except for U. fukasawana Kishida, 1940, as well as newly collected specimens. As a result, we describe a new species, Utivarachna itiokai sp. nov., which belongs to the dusun-group. We also provide the first description of the female of Utivarachna ichneumon and redescribe the known Utivarachna species of Borneo.
  • Shûhei Yamaguchi, Akira Shimizu, Takeshi Yamasaki, Frank E. Kurczewski, Jin Yoshimura, James P. Pitts
    Acta Arachnologica 71(2) 125-127 2022年12月20日  査読有り

MISC

 8

書籍等出版物

 1

講演・口頭発表等

 7

担当経験のある科目(授業)

 6

共同研究・競争的資金等の研究課題

 9