Holotype specimens of new Tetrastemma species; photographs were taken in life by NH A–C T. album sp. nov. A complete body, dorsal view B head, dorsal view C head, ventral view D T. persona sp. nov., complete body, dorsal view E–I T. shohoense sp. nov. E complete body F head, ventral view G squeezed specimen under a cover slip, complete body, dorsal view H head, dorsal view I stylet apparatus. Abbreviations: acf, anterior cephalic furrow; pcf, posterior cephalic furrow, cg, cerebral ganglia; co, cerebral organ; pb, proboscis; pp, proboscis pore. Scale bars: 2 mm (A); 500 μm (B, C, G); 1 mm (D, E); 100 μm (F, H); 50 μm (I).