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 Diversibipalium contortolineatum Solà & Sluys , sp. nov. Material : Holotype , RMNH .VER.21030.a (field number RS581.2), Tandu Batu , limestone outcrop near Sukau , Kinabatangan Valley , Sabah , Malaysian Borneo , 5º36’14.4’’N 118º20’24.00’’E , 19 April 2016 , coll. Kasper Hendriks , Leonel Herrera Alsina and Giacomo Alciatore. The tip of the tail was used for DNA extraction. Paratypes , RMNH .VER.21030.b (field number RS581.1), ibid .; RMNH .VER.21030.c (field number RS581.3), ibid . In specimen RMNH .VER.21030.b (field number RS581.1), a pharyngeal portion was cut off for DNA extraction, while in specimen RMNH .VER.21030.c (field number RS581.3) the tip of the tail was cut off for the same purpose. At this moment, histological sections of these animals are unavailable and, thus, there is no information on the anatomy of the reproductive apparatus.