The genus Myrsidea Waterston (Phthiraptera: Menoponidae) from tyrant­flycatchers (Passeriformes: Tyrannidae), with descriptions of 13 new species Author Price, Roger D. Author Hellenthal, Ronald A. Author Dalgleish, Robert C. text Zootaxa 2005 1048 1 20 journal article 50930 10.5281/zenodo.169922 411f7731-a3e1-430d-bf47-e6a4ad0685bf 1175­5326 169922 Myrsidea cayanensis Price, Hellenthal and Dalgleish , new species ( Figs. 18–19 ) Type host . Myiozetetes cayanensis (L.), Rusty­margined Flycatcher. Female. Dorsal thorax and dorsoventral abdomen as in Fig. 18 . Metanotum with 9 marginal setae. Tergite I with very slight medioposterior convexity, II with wide rounded convexity, III with moderate rounded convexity, IV–VI with slight median compression, and VII–VIII normal. Tergal setae: I, 13; II–V, 14–15; VI, 13; VII, 11; VIII, 8. Postspiracular setae shortest on V, moderately long on I, III, and VI–VIII, and very long on II and IV. Sternal setae: II, each aster with 4–5 setae, 26 other setae; III, 25; IV, 40; V, 54; VI, 41; VII, 17; VIII–IX of subgenital plate, 20; posterior margin of subgenital plate with heavy irregular spiculations ( Fig. 19 ). Anus with 37 setae in dorsal fringe, 32 in ventral. Dimensions: TW, 0.50; HL, 0.34; PW, 0.31; PSL, 0.12; MW, 0.44; MSL, 0.16; AWIV, 0.61; ANW, 0.22; TL, 1.55. Male . Unavailable. Type material . Holotype female ( NMNH ), ex M. cayanensis , VENEZUELA : Edo. Bolivar, 60 km E Sta. Elena, Jan 1987 , R. C. Dalgleish. Remarks . The female of this species, with its modification of the anterior abdominal tergites ( Fig. 18 ) coupled with the unusual spiculation associated with the posterior margin of the subgenital plate ( Fig. 19 ), the small number of marginal metanotal setae, and the large number of sternal setae on IV–VII, is separable from others of this group.