Myrsidea dacostai Price, Johnson

Price, Roger D., Johnson, Kevin P. & Dalgleish, Robert C., 2008, Five new species of Myrsidea Waterston (Phthiraptera: Menoponidae) from antshrikes and antbirds (Passeriformes: Thamnophilidae), Zootaxa 1819, pp. 55-62 : 58

Myrsidea dacostai Price, Johnson , and Dalgleish, new species

Type host. Thamnophilus doliatus (Linnaeus, 1764) , the Barred Antshrike.

Female (3). Metanotum with 7–8 marginal setae; metasternal plate with 5–7 setae. Tergal setae: I, 16–18; II, 15–19; III, 15–18; IV, 18–19; V, 19–21; VI, 19–20; VII, 16–18; VIII, 9–12. Sternal setae: II, 14–16 marginal between asters, 8–9 anterior; III, 21–23; IV, 29–34; V, 33–37; VI, 30–33; VII, 8–11; VIII–IX, 18–21. Anus with 45–47 ventral, 44–50 dorsal fringe setae. Dimensions: TW, 0.49–0.50; HL, 0.33–0.34; PW, 0.31– 0.33; MW, 0.48–0.51; AWIV, 0.67–0.72; ANW, 0.25–0.28; TL, 1.58–1.66.

Male (2). Metanotum with 7–8 marginal setae; metasternal plate with 4–5 setae. Tergal setae: I, 9; II–III, 14–15; IV, 15–16; V, 17–18; VI, 15–16; VII, 11–13; VIII, 8–9. Sternal setae: II, 11–12 marginal between asters, 8–9 anterior; III, 19–20; IV, 24–26; V–VI, 27–28; VII, 14; VIII, 9–12. Dimensions: TW, 0.45–0.46; HL, 0.31–0.32; PW, 0.28–0.29; MW, 0.41–0.42; AWIV, 0.53; GL, 0.44–0.46; TL, 1.36–1.37.

Type material. Holotype male ( USNM), ex T. doliatus , NE PERU: 50 km SE Iquitos, Explor Ama Camp, Rio Yanamoto, 20 June 1989, R.C.D. et al. Paratypes: ( USNM) 2 females, same data as holotype; ( INHS) 1 female, 1 male, same data as holotype.

Remarks. Both sexes of M. dacostai are larger in most dimensions than for M. klickai and they also have more marginal metanotal and abdominal tergal setae.

Etymology. This species is named for Jeff DaCosta, Marjorie Barrick Museum, University of Nevada, Las Vegas, in recognition of his assistance in collecting the lice used in this study and for his work on bird systematics.