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TACHI Takuji Last modified date:2018.07.10

Associate Professor / Biosystematics Laboratory
Department of Environmental Changes
Faculty of Social and Cultural Studies


Graduate School


E-Mail
Phone
092-802-5645
Fax
092-802-5645
Academic Degree
the doctoral degree of Science
Country of degree conferring institution (Overseas)
No
Field of Specialization
Entomology
Total Priod of education and research career in the foreign country
00years00months
Research
Research Interests
  • Study on evolution and origin of the parasitoid habit in Diptera
    keyword : biodiversity, taxonomy, molecular phylogeny
    2011.06~2014.03.
  • I have been studying the biodiversity of Insects. In particular, I am studying systematics of the family Tachinidae (Insecta: Diptera).
    keyword : Biodiversity Entomology Systematics
    2010.04~2010.04.
Academic Activities
Papers
1. TACHI Takuji, Description of the female of Ceromya glaucescens Tachi & Shima (Diptera: Tachinidae) and discovery of unusual sexual dimorphism in this species., Zootaxa, doi.org/10.11646/zootaxa.4237.3.10., 4237, 583-586, 2017.04.
2. TACHI Takuji, Homology of the metapleuron of Cyclorrhapha, with discussion of the paraphyly of Syrphoidea (Diptera: Aschiza), Insect Systematics & Evolution, 10.1163/1876312X-45012112, 45, 395-414, 2014.03, The morphology of the metathorax of brachyceran Diptera is examined, particularly the metapleuron in the superfamily Syrphoidea comprising two families Syrphidae and Pipunculidae. The homologies of the metepisternum (EPS) and metepimeron (EPM) are redefined based on the metapleural suture (PlS), which bears an internal apophysis. A new interpretation of the metathorax is provided for Syrphidae. Members of Schizophora and Pipunculidae have an articulation between EPM and the first abdominal tergite in common and the (metapleural-abdominal) articulation is indicated as a synapomorphy for them. In some species of Syrphidae the well-developed metapostnotum is articulated with the first abdominal tergite and the (metapostnotal-abdominal) articulation is diagnostic of a subgroup of the family. The articulations are evaluated and discussed with respect to abdominal flexion of Diptera..
3. TACHI Takuji, A new species of the genus Trichoformosomyia Townsend from Malaysia (Diptera: Tachinidae)., Zootaxa , 3702, 61-70, 2013.08, A new species of Trichoformosomyia, T. abbreviata sp. nov., is described from Sabah, Malaysia. Trichoformosomyia sauteri Baranov is redescribed and it is newly recorded from China, Vietnam and Japan. A key to the three known species of Trichoformosomyia is given and monophyly of the genus is briefly discussed based on adult morphology. .
4. Takuji TACHI, Systematic study of the genera Phryno Robineau-Desvoidy and Botria Rondani in the Palearctic Region, with discussions of their phylogenetic positions (Diptera, Tachinidae), Zootaxa, 10.11646/zootaxa.3609.4.1, 3609, 4, 361-391, 2013.01, Six species of Phryno Robineau-Desvoidy and three species of Botria Rondani are revised, including four new species:
P. brevicornis sp. nov., P. koreana sp. nov., P. nepalensis sp. nov. and P. tenuiforceps sp. nov. A key to the species of these
genera is provided. A phylogenetic analysis was performed using morphological characters to investigate the placement
of genera in the Zenillia group (sensu Tschorsnig 1985). The inferred trees indicate that Phryno is closely related to Botria,
but monophyly of Phryno is unclear. Based on the results of the analysis, the Zenillia group is redefined to include Allophorocera Hendel, Botria, Ceromasia Rondani, Calozenillia Townsend (new placement), Cyzenis Robineau-Desvoidy,
Erycilla Mesnil, Phryno, Rhacodinella Mesnil, Sericozenillia Mesnil (new placement) and Zenillia Robineau-Desvoidy..
5. T. Tachi, Molecular phylogeny and host use evolution of the genus Exorista Meigen (Diptera: Tachinidae), Molecular Phylogenetics and Evolution, 2013.01, Members of the genus Exorista are parasitoids of a diverse array of insect hosts in the orders, Lepidoptera, Hymenoptera, Mantodea and Orthoptera. Phylogenetic relationships among subgenera and species of Exorista were inferred using four nuclear (Tpi, white, 18S and 28S) and four mitochondrial DNA (16S, 12S, ND5 and CO1) genes in maximum parsimony (MP), maximum likelihood (ML) and Bayesian Markov chain Monte Carlo (MCMC) analyses. Separate trees based on different sets of genes (mt DNA, nuclear, ribosomal etc.) were compared and found to be nearly concordant. According to the molecular tree generated from the concatenated sequence data, the genus Exorista is paraphyletic. The phylogenetic analyses indicate the existence of two major clades of Exorista, including two genera Parasetigena and Phorocera. Morphological traits supporting clades indicated by molecular analyses within this genus are evaluated. Evolutionary patterns of the host use and host shifts are examined by optimizing host information using maximum likelihood on the molecular phylogeny. The ancestral host group of the tribe Exoristini (excluding Ctenophorinia and Phorinia) appears to be the order Lepidoptera, although hosts of some species are unknown. A major host shift to the Hymenoptera occurred in the clade of subgenus Adenia, and the ancestral state of subgenus Spixomyia is equivocal because there is little information available on the hosts in members of a subclade of this group (subclade A: E. hyalipennis group). .
6. Tachi, T., Three new species of Exorista Meigen (Diptera: Tachinidae), with a discussion of the evolutionary pattern of host use in the genus, Journal of Natural History, 45, 1165-1198, 2011.05, Five Exorista species from Malaysia and Indonesia are treated and diagnostic characters of the male postabdomen are illustrated. Three of them are described as new: Exorista globosa sp. nov., E. flaviventris sp. nov. and E. sabahensis sp. nov. Phylogenetic analysis is performed with morphological data used in the previous study of Tachi & Shima (2008) along with the five species treated here. Based on the generated tree, the five species treated here are assigned to Spixomyia Crosskey. Exorista ladelli (Baranov) is transferred to Spixomyia from the subgenus Podotachina Brauer and Bergenstamm. Evolutionary patterns of host use in the genus Exorista Meigen are discussed. Host information is optimized on the resultant tree under the most parsimonious reconstruction. The original host of the tribe Exoristini (except Ctenophorinia Mesnil and Phorinia Robineau-Desvoidy) was order Lepidoptera, and transitions to other orders (Hymenoptera, Mantodea and Orthoptera) occurred in subgenera Adenia Robineau-Desvoidy and Spixomyia, respectively..
7. Tachi T., Shima H., Molecular phylogeny of the subfamily Exoristinae (Diptera, Tachinidae), with discussions on the evolutionary history of female oviposition strategy, Systematic Entomology, 35, 148-163, 2010.04.
Membership in Academic Society
  • The Entomological Society of Japan