Description of the male of Mayriphilopterus nystalicus Mey, 2004 (Phthiraptera, Ischnocera, Philopteridae) Author Valim, Michel P. Author Linardi, Pedro M. text Zootaxa 2007 1604 47 51 journal article 10.5281/zenodo.178748 fc9cb1df-f5f5-4bbb-a9e4-7e4de57ef9bd 1175-5326 178748 Key for species of genus Mayriphilopterus Mey, 2004 1- Hyaline margin with two pairs of spatulate setae ....................................................................................... 2 - Hyaline margin with four pairs of spatulate setae ........................................................ M. ernsti Mey, 2004 2- Pterothorax with more than 30 long setae on posterior margin ................................................................... 3 - Pterothorax with fewer than 25 long setae on posterior margin .................................................................. 4 3 - Tergite VIII of females with four setae; vulvar region with 60 small setae and 12–13 medium to long setae ............................................................................................................................... M. galbulicus Mey, 2004 - Tergite VIII of females with six setae; vulvar region with 80 small setae and 16 medium to long setae ..... ......................................................................................................................... M. brevicephalus Mey, 2004 4- Sternites present and well pigmented on females........................................................................................ 5 - Sternites absent on males and females .................................................................. M. nystalicus Mey, 2004 5 - Posterior margin of pterothorax rounded ( 0.22 in males and 0.24 in females in length); cephalic index 1.12 in males and 1.04 in females; male genitalia as in Fig. 3 (Plate VII of Carriker, 1963 : 29) ......................... ......................................................................................................................... M. spinosus ( Carriker, 1963 ) - Posterior margin of pterothorax with a bluntly rounded projection on median line ( 0.24 in males and 0.26 in females in length); cephalic index 1.07 in males and 1.03 in females, male genitalia much as in Fig. 4 ..................................................................................................................... M. orinocensis ( Carriker, 1963 )