Review of the Pacific leafhopper genus Hecaloidella (Hemiptera: Cicadellidae Deltocephalinae: Selenocephalini) with description of sixteen new species Author Xu, Deliang 0000-0003-0106-5570 Key Laboratory of Plant Protection Resources and Pest Management, Ministry of Education, Entomological Museum, College of Plant Protection, Northwest A & F University, Yangling, Shaanxi 712100, China & 18710305867 @ 163. com; https: // orcid. org / 0000 - 0003 - 0106 - 5570 Author Webb, Michael D. 0000-0002-1312-6142 Department of Life Sciences, Natural History Museum, Cromwell Road, London, ME 15 6 QX, UK & mdwebb 04 @ gmail. com; https: // orcid. org / 0000 - 0002 - 1312 - 6142 mdwebb04@gmail.com Author Shang, Suqin 0000-0001-9376-0735 Biological Engineering Laboratory of Crop Diseases and Pests of Gansu Province, College of Plant Protection, Gansu Agricultural University, Lanzhou, Gansu 730070, China & shangsq @ gsau. edu. cn; https: // orcid. org / 0000 - 0001 - 9376 - 0735 shangsq@gsau.edu.cn Author Zhang, Yalin 0000-0002-1204-9181 Key Laboratory of Plant Protection Resources and Pest Management, Ministry of Education, Entomological Museum, College of Plant Protection, Northwest A & F University, Yangling, Shaanxi 712100, China & yalinzh @ nwsuaf. edu. cn; https: // orcid. org / 0000 - 0002 - 1204 - 9181 yalinzh@nwsuaf.edu.cn text Zootaxa 2021 2021-03-22 4948 3 381 403 journal article 7470 10.11646/zootaxa.4948.3.4 6bfd846c-0304-4330-8941-95c406630230 1175-5326 4629100 8E0BF97A-D9E1-4F2E-BB63-82A6ED47E5DC H . sandakanensis Zhang & Webb sp. nov. Figs. 1R , 8E–H Description. Body length (including tegmina), male: 5.3mm ; female: 5.6mm . Colour as in H . brunnifacialis . Male genitalia similar to H . brunnifacialis but aedeagus with very long basal apodeme; shaft abruptly tapered subapically in lateral view with two pairs of closely appressed processes, gonopore arising subapically on ventral surface. Female pregenital sternite with posterior margin produced medially. Material examined. Holotype : ♂ , Borneo, Sandakan, Baker ( NMNH ) . Paratype : 1♀ , same data as holotype ( NMNH ) . Etymology. This species is named after the type locality. Remarks. This species can be distinguished from other H . quadripicta group species by the two pairs of closely appressed apical aedeagal processes.