Molecular phylogenetics facilitates the first historical biogeographic analysis of the hammerhead worms (Platyhelminthes: Tricladida: Bipaliinae), with the description of twelve new species and two new genera Author Solà, Eduard 0000-0003-1848-4085 eduardsola@ub.edu Author Sluys, Ronald 0000-0002-9776-3471 luys@naturalis.nl Author Riutort, Marta 0000-0003-1848-4085 eduardsola@ub.edu Author Kawakatsu, Masaharu 0000-0003-1848-4085 eduardsola@ub.edu text Zootaxa 2023 2023-08-18 5335 1 1 77 http://dx.doi.org/10.11646/zootaxa.5335.1.1 journal article 276875 10.11646/zootaxa.5335.1.1 93074190-36cb-467e-a6ef-103ac5e13f4b 1175-5326 8261375 E4E9FD1D-1923-416E-A5B5-4AC62A4F5DCD Bipalium kewense Moseley, 1878 Material: RMNH .VER.20259.a (field number KSL2400.2), ground of Junshin Girl’s Junior & Senior High School , Bunkyō-chō , Nagasaki City , Nagasaki Prefecture, Kyūshū , Japan , 5th November 2004 , coll. Mr. Kiyohiko Yamamoto , sagittal sections (7 μm) of a portion of the body containing the pharynx on 27 slides; sagittal sections (7 μm) of a portion of the body containing the copulatory apparatus on 9 slides. The remaining parts of the specimen (including the head) were returned to alcohol 70 %. RMNH .VER.20260.a (field number KSL2400.1), ground of Junshin Women’s High School , Bunkyō-chō , Nagasaki City , Nagasaki Prefecture, Kyūshū , Japan , 28th October 2004 , coll. Mr. Kiyohiko Yamamoto. A prepharyngeal piece was cut off for molecular analyses .