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 . nudapenis Zhang & Webb sp. nov. Figs. 1D , 4F–J Description. Body length (including tegmina), male: 4.5–5.5mm . Vertex sordid yellow, anteriorly orange with a small brown spot each side of midline and a faint spot at apex. Face nearly entirely dark brown. Thorax dorsally stramineous to sordid yellow. Thorax and abdomen ventrally brown. Forewing veins dark brown. Male genitalia as in H . pacifica but connective caudal extension straighter and aedeagal shaft without processes. Material examined. Holotype : ♂ , Indonesia , Sulawesi Utara , Dumoga-Bone National Park , Clark’s Camp , at light, 1140m ., J.H. Martin , iv.1985 , RESL-Project Wallace , NHMUK 010591768 ( BMNH ) . Paratype : 1♂ , same data as holotype except v.1985 , at light ( BMNH ) . Other material. 1♀ , same data as holotype ; 1♀ , same data as holotype except v. 1985 ; 1? (abdomen missing), Indonesia , Sulawesi Tengah , nr Morowali, Ranu River area , 27.i.-20.iv.1980 , M.J.D. Brendell (all BMNH ) . Etymology. Named H . nudapenis (Latin nuda , without or lacking) referring to the absence of distal processes on the aedeagal shaft. Remarks. This species is similar to H. caudospina collected from the same locality in Sulawesi but lacks a ventral process on the connective caudal extension and the ventral process of the aedeagus is longer. Although the facial marking is almost completely brown in the two males examined compared to only brown dorsally in males of H. caudospina this difference needs to be confirmed by examination of further males as the similarly coloured topotypical females (tentatively identified under the two species) show a little variability in the extremes of facial marking.