Myrsidea rohi Ansari, 1956

Kounek, Filip, Sychra, Oldrich, Capek, Miroslav & Literak, Ivan, 2013, Chewing lice of genus Myrsidea (Phthiraptera: Menoponidae) from Turdidae (Passeriformes) of Costa Rica, with descriptions of seven new species, Zootaxa 3620 (2), pp. 201-222 : 213-214

Myrsidea rohi Ansari, 1956

Myrsidea rohi Ansari, 1956 : Pak. J. Health, 5: 170, Figs 6 a–f.

Type host: Catharus gracilirostris (Salvin, 1865) — Black-billed Nightingale-Thrush

Material studied. Two females and 2 males (O.Sychra CR204–205), ex Catharus gracilirostris COSTA RICA: Braulio Carrillo National Park, Sector Barva (10˚07’N, 84˚07’W; 2600 m), 31 July–7 August 2010, Sychra and Literak leg.; 5 females and 5 males (O.Sychra CR206–210), ex Catharus gracilirostris COSTA RICA: Tapanti National Park, Sector Cerro de la Muerte (9°33’N, 83°43’W; 3100 m), 1–13 August 2010, Sychra and Literak leg. Deposited in INBio.

Remarks. Our specimens differ from the redescription of M. rohi presented by Clay (1966) by setal counts and dimensions. Furthermore, our specimens from Cerro de la Muerte ( Tapanti NP) differ from those from Barva (Braulio Carrillo NP) as well as from those redescribed by Clay (1966) in the number of tergal setae and shape of tergites of the female. According to our knowledge of intraspecific variation in Myrsidea species (Clay, 1966), these differences could be used to separate these two populations into subspecies (see Palma & Price 2010), or even into species. However our preliminary results from molecular analyses of partial sequences of the mitochondrial COI gene do not support genetic distinctiveness of these two samples. Until final results of molecular analyses become available we suggest to consider the Myrsidea population from the Catharus gracilirostris of Cerro de la Muerte as conspecific with M. rohi .

Descriptions of samples from separate localities. [setal counts and dimensions mentioned by Clay (1966) are in parentheses].

Braulio Carrillo NP, Sector Barva

Female (n = 2). As in Fig. 37 . Length of DHS 10, 0.040–0.050; DHS 11, 0.090–0.095; ratio DHS 10/11, 0.42–0.56. Metanotum with 17–21 (16–19) marginal setae.

Tergal setae: II, 19–24 (19–22); III, 17–22 (17–19); IV, 17–20 (15–18); V, 17–20 (15–16); VI, 18–19 (13–17). Total setal number on tergites I–VII, 114–138 (105–125). Postspiracular setae very long, 0.40, on II, IV and VIII; long, 0.29, on I; short, 0.14–0.18, on III, V and VI, and very short, 0.08–0.09, on VII. Sternal setae: 4–5 (4) in each aster, II, 17–21 (15–16) marginal setae between asters, 11 (6–7) anterior; III, 21–25 (16–24); IV, 27–30 (21–24); V, 29–34 (21–27); VI, 24–27 (18–22); VII, 20 (15–17); VIII–IX, 21–23 (22–25) including 11–12 setae on deeply serrated vulval margin; without medioanterior setae on sternites III–VII. Dimensions: HL, 0.25 (0.27); MW, 0.39–0.41 (0.37); AW, 0.53 (0.50); ANW, 0.18–0.19; TL, 1.33 (1.27).

Male (n = 2). Tergal setae: II, 16 (11–14); III, 16 (13–14); IV, 15 (13–14); VII, 9 (8). Sternal setae: 4–5 (4) in each aster, 16 (10–12) marginal setae between asters, II, 10 (5–7) anterior; III, 20 (12–17); IV, 26 (16–23); V, 28 (19–23); VI, 25 (17–22); VII, 19 (14–15); sternites III–VII without medioanterior setae. Dimensions: HL, 0.23 (0.25–0.26); PW, 0.22 (0.23); MW, 0.29 (0.32); TL, 1.09 (1.12); GW, 0.09; GSL, 0.07–0.08.

Tapanti NP, Sector Cerro de la Muerte

Female (n = 5). As in Fig. 35 . Length of DHS 10, 0.055–0.065; DHS 11, 0.105–0.120; ratio DHS 10/11, 0.46–0.62. Metasternal plate with 7–9 setae, metanotum with 19–21 (16–19) marginal setae. Femur III with 14–16 (11–12) setae in ventral setal brush.

Tergite I enlarged with convex posterior margin, but not tapering. Tergites II–V compressed by tergite I, but not too narrow ( Fig. 21 vs. Fig. 38 in Clay 1966, and Fig. 36 vs. Fig. 38 ). Tergal setae, I, 24–27 (14–21); II, 23–26 (19–22); III, 24–26 (17–19); IV, 21–23 (15–18); V, 21–24 (15–16); VI, 19–22 (13–17); VII, 11–17 (12); VIII, 8–9 (8). Total setal number on tergites I–VII, 143–165 (105–125 or 105–138 if specimens from Braulio Carrillo are included). Postspiracular setae extremely long, 0.40–0.43, on II, IV; very long, 0.35–0.37, on VIII; long, 0.25–0.27, on I; short, 0.14–0.16, on III, V and VI, and very short, 0.08–0.10, on VII. Sternal setae: II, 4–5 (4) in each aster, 16–23 (15–16) marginal setae between asters, 9–13 (6–7) anterior; III, 24–28 (16–24); IV, 30–37 (21–24); V, 27–37 (21–27); VI, 27–32 (18–22); VII, 17–22 (15–17); VIII–IX, 24–27 (22–25) including 14–15 (11–14) setae on deeply serrated vulval margin; without medioanterior setae on sternites III–VII. Sternite VI slightly arched ( Fig 21 ). Anal fringe formed by 28–34 dorsal and 25–35 ventral setae. Dimensions: TW, 0.39–0.41 (0.39); HL, 0.26–0.28 (0.27); MW, 0.39–0.42 (0.37); AW, 0.49–0.58 (0.50); ANW, 0.19–0.21; TL, 1.29–1.40 (1.27).

Male (n = 5). Length of DHS 10, 0.055–0.060; DHS 11, 0.095–0.100; ratio DHS 10/11, 0.55–0.63. Metasternal plate with 6 setae, metanotum with 12–14 (10–12) marginal setae.

Tergal setae: I, 14–17 (9–12); II, 15–16 (11–14); III, 15 (13–14); IV, 14–16 (13–14); V, 15–16 (11–13); VI, 13–14 (11–12); VII, 8–10 (8). Postspiracular setae: extremely long (0.38–0.40) on II, IV and VIII; long (0.19–0.21) I and VII; and short (0.10–0.12) on III, V and VI. Sternal setae: II, 3–4 (4–5) in each aster, 14–16 (10–12) marginal setae between asters, 7–9 (5–7) anterior; III, 17–20 (12–17); IV, 24–25 (16–23); V, 23–30 (19–23); VI, 21–26 (17–22); VII, 15–17 (14–15); without medioanterior setae on sternites III–VII. Genital sac sclerite with a relatively large subapical projection on each side and a slightly concave posterior margin, with short darker medioposterior line ( Fig. 22 ). Dimensions: TW, 0.35–0.37 (0.36); HL, 0.25 (0.26); PW, 0.21–0.23 (0.23); MW, 0.30–0.34 (0.32); AW, 0.40–0.42 (0.39); TL, 1.09–1.12 (1.12); GW, 0.09–0.10; GSL, 0.08.

Figures

FIGURES 1 – 6. 1 – 2, Myrsidea assimilis: 1, female dorsoventral mesothorax, metathorax and abdomen. 2, male genital sac sclerite. 3 – 6, Myrsidea cerrodelamuertensis: 3, hypopharyngeal sclerites. 4, female dorsoventral mesothorax, methathorax and abdomen. 5, male genital sac sclerite. 6, male genital sac sclerite distorted. Scale bars = 0.5 mm for all figures.

FIGURES 35 – 38. 35 – 36: Myrsidea rohi Ansari, 1956 from Cerro de la Muerte (Tapanti NP): 35, female. 36, detail of tergites of female. 37 – 38, Myrsidea rohi Ansari, 1956 from Barva (Braulio Carrillo NP): 37, female. 38, detail of tergites of female.

FIGURES 19 – 22. 19 – 20, Myrsidea quinchoi: 19, female dorsoventral mesothorax, methathorax and abdomen. 20, male genital sac sclerite. 21 – 22, Myrsidea rohi from Cerro de la Muerte (Tapanti NP): 21, female dorsoventral mesothorax, methathorax and abdomen. 22, male genital sac sclerite. Scale bars = 0.5 mm for all figures.