Myrsidea fusca ( Carriker, 1903 )

Kounek, Filip, Sychra, Oldrich, Capek, Miroslav, Lipkova, Alexandra & Literak, Ivan, 2011, Chewing lice of the genus Myrsidea (Phthiraptera: Menoponidae) from the Cardinalidae, Emberizidae, Fringillidae and Thraupidae (Aves: Passeriformes) from Costa Rica, with descriptions of four new species, Zootaxa 3032, pp. 1-16 : 7-8

Myrsidea fusca ( Carriker, 1903)

Menopon thoracicum fuscum Carriker, 1903: 187 . Type host: Ramphocelus passerini Bonaparte — Passerini ´s Tanager. Myrsidea fusca ; Price and Dalgleish, 2006: 14, Figs. 16–17. Redescription, from type host.

Material studied. 2 females and 2 males, ex Ramphocelus costaricensis Cherrie—Cherrie ´s Tanager ( Thraupidae ). COSTA RICA: Zona Protectora Las Tablas, La Amistad Lodge (8°54’N, 82°47’W; 1300m), 18 and 22 August 2010, Sychra and Literak leg. Deposited in INBio (O.Sychra CR138–139); 4 females and 3 males, ex Ramphocelus passerine (Thraupidae) , COSTA RICA: Tapanti National Park, Sector Tapanti (09°46’N, 83°47’W; 1200m), 7 August 2009, Sychra and Literak leg. Deposited in INBio (O.Sychra CR140–142) and MZM (O.Sychra CR143).

Remarks. This is the first record of a chewing louse from Ramphocelus costaricensis . Our specimens differ from the redescription of M. fusca presented by Price and Dalgleish (2006) by tergal and sternal setal counts and dimensions as follows [setal counts and dimensions mentioned by Price and Dalgleish (2006) are in parentheses]:

From R. costaricensis :

Female (n = 2). Length of head seta 10, 0.040–0.045; seta 11, 0.110–0.120; ratio10/11, 0.33–0.41. Tergal setae: III, 17–21 (17–20); sternal setae: III, 26–35 (23–29); IV, 38–46 (30–39); VII, 22–30 (19–26); VIII–IX, 18– 22 (16–21); sternites III–VII without medioanterior setae. Dimensions: TW, 0.45 (0.46–0.49); PW, 0.26–0.28 (0.28–0.31); ANW, 0.23–0.25 (0.22–0.24).

Male (n = 2). Metanotum with 11–12 (12–16). Tergal setae: I, 9–11 (10–12); II, 16–17 (15–16); IV, 18–19 (16– 18); VI, 17–19 (14–17); VIII, 16 (13–14). Sternite II, 24 (27–29); III, 20–27 (23–24); VII, 26 (22–25); sternites III– VII without medioanterior setae. Dimensions: PW, 0.24–0.25 (0.27–0.30).

From R. passerini :

Female (n = 4). Length of head seta 10, 0.035; seta 11, 0.105; ratio10/11, 0.33. Sternal setae: II, 25–26 (27– 32).

Male (n = 3). Tergal setae: II, 15–17 (15–16); VII, 18 (14–17). Sternal setae: II, 20 (27–29); III, 22–25 (23– 24); VII, 19 (22–25). sternites III–VII without medioanterior setae (only one male with one seta). Dimensions, AW, 0.44 (0.45–0.49).