Taxonomic revision of Old World members of the feather louse genus Columbicola (Phthiraptera: Ischnocera), including descriptions of eight new species Author Adams, Richard J. Author Price, Roger D. Author Clayton, Dale H. text Journal of Natural History 2005 2005-12-23 39 41 3545 3618 http://dx.doi.org/10.1080/00222930500393368 journal article 10.1080/00222930500393368 1464-5262 5220802 18. clayae species group The seven species in this group are from the host genera Treron , Columba , and Ptilinopus . They have the anterior marginal head carina rounded, complete ( Figure 158 ); body elongate; and each side of metanotum with three long, one short setae ( Figure 3 ). Male antenna with enlarged scape, spur on third segment; genitalic mesosome variable, rounded ( Figure 164 ), or triangular ( Figure 169 ), often with distinct anterior groove, and each side with three pores ( Figure 160 ); parameres with medial expansions. Female subgenital plate groove variable, rounded anteriorly; 0–5 short to minute lateral setae ( Figures 161 , 165 ).