Taxonomic revision of taeniid tapeworms

• Project/Area Number: 26460503
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Parasitology (including sanitary zoology)
• Research Institution: Asahikawa Medical College
• Principal Investigator: Nakao Minoru 旭川医科大学, 医学部, 准教授 (70155670)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: テニア科条虫 / 分類学的改訂 / Taenia / Hydatigera / Versteria / Echinococcus / Taenia属 / 分子系統

Outline of Final Research Achievements

The family Taeniidae of Eucestoda has been divided into four genera (Taenia, Hydatigera, Versteria, and Echinococcus). In this research project, taeniid samples were collected as many as possible, and then subjected into phylogenetic analyses for taxonomic revision of the family. A molecular phylogeny was reconstructed by using the nucleotide sequences of the mitochondrial genomes and the nuclear DNA markers (18S rDNA, pepck, and pold). The analysis showed that members of the genus Taenia are separated into 6 monophyletic clades, suggesting that Taenia should be split into several genera or subgenera. However, additional taxa are required for the taxonomic revision. Two new species of taeniid tapeworms were found during this research project, and described as Taenia lynciscapreoli sp. nov. and Hydatigera kamiyai sp. nov.

Research Products

• [Journal Article] Description and life-cycle of Taenia lynciscapreoli sp. n. (Cestoda, Cyclophyllidea). (2016)
  • Author(s): Haukisalmi V, Konyaev S, Lavikainen A, Isomursu M, Nakao M.
  • Journal Title: Zookeys Volume: 25 Pages: 1-23
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Reappraisal of Hydatigera taeniaeformis (Batsch, 1786) (Cestoda: Taeniidae) sensu lato with description of Hydatigera kamiyai n. sp. (2016)
  • Author(s): Lavikainen A, Iwaki T, Haukisalmi V, Konyaev SV, Casiraghi M, Dokuchaev NE, Galimberti A, Halajian A, Henttonen H, Ichikawa-Seki M, Itagaki T, Krivopalov AV, Meri S, Morand S, Näreaho A, Olsson GE, Ribas A, Terefe Y, Nakao M.
  • Journal Title: International Journal for Parasitology Volume: 46 Issue: 5-6 Pages: 361-374
  • DOI: 10.1016/j.ijpara.2016.01.009
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Cryptic diversity in hymenolepidid tapeworms infecting humans (2016)
  • Author(s): Nkouawa A, Haukisalmi V, Li T, Nakao M, Lavikainen A, Chen X, Henttonen H, Ito A
  • Journal Title: Parasitol Int Volume: 65 Issue: 2 Pages: 83-86
  • DOI: 10.1016/j.parint.2015.10.009
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Description and life-cycle of Taenia lynciscapreoli sp. n. (Cestoda, Cyclophyllidea) (2016)
  • Author(s): Haukisalmi V, Konyaev S, Lavikainen A, Isomursu M, Nakao M
  • Journal Title: ZooKeys Volume: 584 Pages: 1-26
  • DOI: 10.3897/zookeys.584.8171
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Phylogenetic characterisation of Taenia tapeworms in spotted hyenas and reconsideration of the “Out of Africa” hypothesis of Taenia in humans. (2014)
  • Author(s): Terefe Y, Hailemariam Z, Menkir S, Nakao M, Lavikainen A, Haukisalmi V, Iwaki T, Okamoto M, Ito A.
  • Journal Title: International Journal of Parasitology Volume: 44 Issue: 8 Pages: 533-541
  • DOI: 10.1016/j.ijpara.2014.03.013
  • Peer Reviewed / Acknowledgement Compliant