Twelve new species of Guimaraesiella (Phthiraptera: Ischnocera: Philopteridae) from “ babblers ” (Passeriformes: Leiothrichidae, Pellorneidae, Timaliidae) with a description of a new subgenus and a key to its species Author Gustafsson, Daniel R. Author Clayton, Dale H. Author Bush, Sarah E. text Zootaxa 2019 2019-01-09 4543 4 451 497 journal article 27694 10.11646/zootaxa.4543.4.1 57c7ab87-1ca3-4430-9621-c1d3734d881e 1175-5326 2617937 4F591303-AF92-4BBB-8B68-EDD27AA229DE Guimaraesiella ( Cicchinella ) species groups Based on the shape of the preantennal area, the detailed structure of the male genitalia, the thoracic and abdominal chaetotaxy and the female subgenital plate, we divide the subgenus Guimaraesiella ( Cicchinella ) into three different species groups. The three types of nodi of the distal mesosome of the male genitalia are as follows: (1) triangular nodi are marginal throughout most or all of their length, and typically protrude laterally to form angular extensions in the proximal end; (2) elongated nodi only reach the margin of the mesosome in their distal end, and do not form angular extensions; (3) arched nodi are submarginal throughout most of their length, but reach the mesosomal margin proximally, near the rugose nodi. These species groups are erected based on shared morphological characters that make the identification of species easier but, ultimately, these groups may not be monophyletic.