Phylogeny and biogeography of the genus Trichadenotecnum (Insecta: Psocodea), showing the arcto-Tertiary distribution

2015 Fiscal Year Final Research Report

• Project/Area Number: 24570093
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Biodiversity/Systematics
• Research Institution: Hokkaido University
• Principal Investigator: YOSHIZAWA Kazunori 北海道大学, (連合)農学研究科(研究院), 准教授 (10322843)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 生物地理 / 系統 / 形態 / チャタテムシ / ムツテンチャタテ

Outline of Final Research Achievements

Trichadenotecnum species of Southeast Asia were revised taxonomically. During the project period, a total of nine new species were described and a genus, Cryptopsocus from China, was synonymized with Trichadenotecnum.
World-based phylogeny of Trichadenotecnum was estimated. Most species groups recognized morphologically were identified as monophyletic group. In contrast, extensive morphological convergences/reversals were detected in a few species group, which caused inappropriate species-group classification. Dating and biogeographical analyses suggested that the tans-continental dispersal via Bering Strait during the Tertiary period and reduction of distributional area during the last gracious period affected strongly in forming the present distributional pattern of Trichadenotecnum.

Free Research Field

昆虫体系学