The ischnoceran chewing lice (Phthiraptera: Ischnocera) of bulbuls (Aves: Passeriformes: Pycnonotidae), with descriptions of 18 new species Author Gustafsson, Daniel R. 8D918E7D-07D5-49F4-A8D2-85682F00200C Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou, China. Department of Veterinary Sciences, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Kamycka 129, 165 00 Prague 6, Czech Republic. School of Biological Sciences, University of Utah, 257 S. 1400 E., Salt Lake City, Utah, 84112, USA. kotatsu@fripost.org Author Najer, Tomas 08A25BDD-8CCD-4709-9A57-7CE235D473C7 najer@af.czu.cz,tomas.najer@gmail.com Author Zou, Fasheng 9D1BB50D-CD19-4332-8854-4D0EA411342C Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou, China. Department of Veterinary Sciences, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Kamycka 129, 165 00 Prague 6, Czech Republic. School of Biological Sciences, University of Utah, 257 S. 1400 E., Salt Lake City, Utah, 84112, USA. zoufs@giz.gd.cn Author Bush, Sarah E. 87DAE296-C04F-4DA5-82A9-AC2715A065F8 dovelouse@gmail.com text European Journal of Taxonomy 2022 2022-03-09 800 1 88 http://dx.doi.org/10.5852/ejt.2022.800.1683 journal article 55869 10.5852/ejt.2022.800.1683 b4506300-8a4a-45f0-bc34-ec2eb31dfc92 2118-9773 6358666 213B577F-867D-4ECD-AD2C-48ACA71801B5 Guimaraesiella flavala (Najer & Sychra in Najer et al. , 2012 ) Brueelia flavala Najer & Sychra in Najer et al ., 2012: 42 . Guimaraesiella flavala – Gustafsson & Bush 2017: 221 . Material examined Paratypes ( ex Hemixos flavala ) VIETNAM • 2 ♀♀ ; Ninh Binh Province , Cuc Phuong , Botanical Garden ; 20°14′55.2″ N 105°42′45.7″ E ; 7 Feb. 2010 ; I. Literak leg.; ID: O. Sychra ; V18 ; MMBC . Non-type material ( ex Hemixos castanonotus canipennis ) CHINA • 1 ♀ ; Guanxi Province , Shiwandashan National Park ; 20 Apr. 2005 ; S.E. Bush and D.H. Clayton leg.; host MBR-6686; lice P-894 ; NHML [on same slide as holotype of Brueelia colindalei sp. nov. ] . Type locality Botanical Garden, Cuc Phuong, Ninh Binh Province , Vietnam . Type host Hemixos flavala Blyth, 1845 – ashy bulbul. Other hosts Hemixos castanonotus Swinhoe, 1870 – chestnut bulbul. Hemixos castanonotus canipennis Seebohm, 1890. New host record. Remarks The female examined from China corresponds well with the original description and illustration of Guimaraesiella flavala , except that the preantennal area is somewhat longer and narrower than originally illustrated ( Najer et al . 2012 : fig. 3e). We tentatively consider this specimen to represent G. flavala , but more specimens are needed to confirm this identification. Our specimen constitutes a new host subspecies association, as well as the first record of this species from China . Guimaraesiella flavala was originally illustrated as having a complete cross-piece along the vulval margin. We examined two paratype females to establish whether or not this cross-piece is present. The distal submarginal plate of Gu. flavala is almost entirely translucent, and the extent of the sclerotization along the vulval margin is difficult to assess; this is also the case in the examined female specimen from China . In at least one paratype female , the lateral section of the vulval margin is hyaline on one side. We interpret this to mean that there is no complete cross-piece in Gu. flavala , but more specimens are needed to establish the shape of the distal subgenital plate and its lateral submarginal bulges.