Umbotectum Solà, Sluys, Riutort & Kawakatsu, 2023, sp. nov.

Umbotectum t-maculatum Solà & Sluys, sp. nov. Material: Holotype, RMNH.VER.21026.a (field number RS327.1), Calcareous outcrop “Batu Batangan”, Kinabatangan River, Sabah, Borneo, approx. 5°27’35.7’’N 118°06’06.3’’E, 20 March 2012, coll. Dr. Heike Kappes, two portions covering a total of 66 slides: sagittal sections of the anterior half on 45 slides (sectioned at intervals of 7 μm); sagittal sections of the posterior half containing the copulatory apparatus on 21 slides (sectioned at intervals of 8 μm).Published as part of Solà, Eduard, Sluys, Ronald, Riutort, Marta & Kawakatsu, Masaharu, 2023, 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, pp. 1-77 in Zootaxa 5335 (1) on page 48, DOI: 10.11646/zootaxa.5335.1.1, http://zenodo.org/record/826137