Myrsidea

Kounek, Filip, Sychra, Oldrich, Capek, Miroslav & Literak, Ivan, 2011, Chewing lice of the genus Myrsidea (Phthiraptera: Menoponidae) from New World warblers (Passeriformes: Parulidae) from Costa Rica, with descriptions of four new species, Zootaxa 3137, pp. 56-63 : 62

Myrsidea species 1 and 2

Material studied. 1 female (O. Sychra CR174) ex Basileuterus tristiatus (Tschudi) , COSTA RICA: Tapanti National Park, Sector Tapanti (09°46'N, 83°47'W; 1200 m), 6 August 2009, Sychra and Literak leg. Deposited in INBio; 1 female with same data deposited in MZM; 1 female ex Parula pitiayumi (Vieillot) , COSTA RICA: Tapanti NP, Sector Tapanti (09°46'N, 83°47'W; 1200 m), 31 July 2009, Sychra and Literak leg. Deposited in MZM.

Remarks. These are the first records of chewing lice from both Basileuterus tristriatus and Parula pitiayumi . Although the 2 females from B. tristriatus are very similar in all characters to those of M. basileuteri , they probably represent a new different species or at least a new subspecies. They have a greater number of setae on tergites II (14–16 vs. 11–13), IV (15 vs. 9–11), V (11–12 vs. 8–10), and also on the vulval margin (10 vs. 7–8). However, males are needed to complete a proper description of this taxon.

The single female from P. pitiayumi is also very similar in all characters to those of M. basileuteri . Nevertheless, it slightly differs in TW (0.39 vs. 0.41), and in setal counts on tergites I (14 vs. 9–12) and V (12 vs. 8–10), and on vulval margin (11 vs. 7–8). Unfortunately, having only one female is insufficient to ascertain whether this Myrsidea represents either a different new species or a new host-louse association for M. basileuteri .