Myrsidea myiobori Kounek & Sychra, 2011

Sychra, Oldřich, Kounek, Filip, Papoušek, Ivo, Ćapek, Miroslav, Cárdenas-Callirgos, Jorge Manuel, Franco, Sebastian & Literák, Ivan, 2014, Chewing lice (Phthiraptera: Amblycera et Ischnocera) from wrens (Passeriformes: Troglodytidae), with description of a new species of Myrsidea, Acta Entomologica Musei Nationalis Pragae 54 (1), pp. 1-27 : 9-10

Myrsidea myiobori Kounek & Sychra, 2011

( Figs 2 C–D)

Myrsidea myiobori Kounek & Sychra, 2011b: 58 , Figs 5 –8.

Type host. Myioborus miniatus (Swainson, 1827) – Slate-throated redstart

Material examined. 1 ♀ 1 3, ‘O.Sychra CR225 / Myrsidea myiobori / Kounek & Sychra, 2011 / det. O.Sychra // Troglodytes aedon intermedius / COSTA RICA / Tapanti National Park / Sector Tapanti / 11.viii.2009 / Literák & Sychra leg.’

Variability. Our specimens differ slightly from the description of M. myiobori in KOUNEK et al. (2011b) by setal counts and dimensions as follows [setal counts and dimensions in KOUNEK et al. (2011b) are in parentheses: setal counts and dimensions that are fully consistent with this description are not repeated here]:

Female (n = 1). As in Fig. 2C . Length of DHS 11 , 0.100 –0.110 (0.110) ; ratio DHS 10 /11, 0.27–0.30 (0.27). First tibia with 3 (3) outer lateral ventral and 4 (4) dorsal setae (setal counts on legs are not mentioned in the description of M. myiobori , hence we added here the same numbers). Femur III with 14 (15–17) setae in ventral setal brush .

Tergal setae counts: I, 9 (10); II, 15 (17); III, 19 (18); IV, 20 (18); V, 21 (19); VI, 18 (19); VII, 18 (15); VIII, 14 (11). Postspiracular setae very long, 0.46–0.48 (0.37–0.43) on II, IV and VIII; long, 0.21–0.23 (0.16) on VII; short, 0.15–0.18 (0.12–0.13) on III, V and VI. Postspiracular setae I are missing. Sternal setae: III, 24 (21); IV, 30 (32); V, 32 (35); VI, 31 (33); VIII–IX, 22 (21) including 13 (12) setae on deeply serrated vulval margin. Inner posterior seta of last tergum not longer than anal fringe setae with length 0.05–0.06 (0.04–0.05). Anal fringe formed by 41 (40) dorsal and 38 (37) ventral setae. Dimensions: TW, 0.44 (0.45); PW, 0.29 (0.28); MW, 0.44 (0.42); AW, 0.60 (0.54); ANW, 0.22 (0.24); TL, 1.50 (1.46).

Male (n = 1). As in Fig. 2D . Length of DHS 10, 0.035 (0.030); ratio DHS 10/11, 0.35 (0.30). Metasternal plate with 7 (6) setae; metanotum with 9 (10) setae on posterior margin. Femur III with 12–14 (10–12) setae in ventral setal brush.

Tergal setae counts: I, 8 (11); II, 16 (16–17); III, 15 (18); IV, 16 (17–18); V 17 (18) ; VI 17 (16–17) ; VII, 12 (14–15); VIII, 11 (11–12). Postspiracular seta I 0.20 long (0.22–0.24). Sternal setae: III, 21 (20); IV, 24 (23–24); V, 30 (27); VI, 28 (22–26); VII, 15 (18); VIII, 8 (7). Genital sac sclerite distorted, but it appears to be of the same type as that of M. myiobori , although the genital sac sclerite of the single paratype male of this species is also distorted ( KOUNEK et al. 2011b: Fig. 8) Dimensions: TW, 0.40 (0.39–0.40) ; AW, 0.44 (0.42–0.43); GW, 0.11 (0.10); GSL, 0.10 (0.07).

Bionomics. Although CICCHINO (1980) mentioned Myrsidea sp. from T. aedon from Argentina, this is the first species determination of a Myrsidea from this host. This louse was originally described from Myioborus miniatus (Swainson, 1827) belonging to family Parulidae from Costa Rica ( KOUNEK et al. 2011b). Our finding represents interesting case of natural host switching and another record of one species of Myrsidea from two unrelated host families.

Figures

Fig. 2. A–B – Myrsidea fasciata Sychra & Kounek, sp. nov. (A – holotype female; B – paratype male). C–D – Myrsidea myiobori Kounek & Sychra, 2011 from Troglodytes aedon (C – female; D – male). Scale bar: 1 mm.

Fig.5. Penenirmus albiventris (Scopoli, 1763).A – dorso-ventral view of head of male; B – dorso-ventral view of head of female; C – male genitalia; D – ventral view of female terminalia. Scales:A, B = 0.20 mm, C, D = 0.10 mm.