Myrsidea scleruri, Kolencik & Sychra & Papousek & Kuabara & Valim & Literak, 2018

Kolencik, Stanislav, Sychra, Oldrich, Papousek, Ivo, Kuabara, Kamila M. D., Valim, Michel P. & Literak, Ivan, 2018, New species and additional data on the chewing louse genus Myrsidea (Phthiraptera: Menoponidae) from wild Neotropical Passeriformes (Aves), Zootaxa 4418 (5), pp. 401-431 : 411-413

Myrsidea scleruri , new species

( Figs 4 , 11 , 22–23 )

Myrsidea sp. 1; Kuabara & Valim, 2017: 150.

Type host. Sclerurus scansor (Menetries, 1835) —rufous-breasted leaftosser.

Type locality. Ilha Grande , Rio de Janeiro, Brazil (23°09'S, 44°14'W) .

Type material. Ex Sclerurus scansor : holotype ♀ ( MZUSP#6745 ), Ilha Grande, Rio de Janeiro , Brazil, 21 September 1944, H. Sick. Paratypes: 2♂, 1♀, ( MZUSP#6743–44 , 6746 ) with the same data as holotype ( MZUSP) .

Other material, non-type. 1♂ San Rafael National Park, Paraguay (26°30'S, 55°47'W), 19 August 2012, I. Literak ( MMBC).

Diagnosis. Myrsidea scleruri n. sp. has the same type of male genital sac sclerite as other species of Myrsidea from the Furnariidae . However, it can be easily distinguished from all Neotropical Myrsidea by a unique combination of characters: (1) pronotum with 8 setae on posterior margin, (2) pleurites III–VII with 2–4 slender and quite long setae, (3) the shape of the male genital sac sclerite ( Fig. 11 ), and (4) shape of female tergites ( Fig. 4 ).

Myrsidea calvi Sychra et al., 2007 —described from Sclerurus guatemalensis (Hartlaub, 1844) in Costa Ricais morphologically close to M. scleruri but both species can be easily separated by: (1) number of setae on the posterior margin of pronotum (6 setae vs 8 setae in M. scleruri ), (2) shape of tergites I and II, and (3) female total length (1.52–1.60 vs 1.86–1.92).

There are five species of Neotropical Myrsidea with 8 setae on the posterior margin of pronotum, as follows: M. aitkeni Clay, 1966 , M. antiqua Ansari, 1956 , M. carrikeri ( Eichler, 1943) , M. elegans Ansari, 1956 and M.

obsoleti Kounek & Sychra [in Kounek et al.], 2013. All these species were described from members of the Turdidae and are placed in the carrikeri species group (sensu Clay 1966). Myrsidea scleruri is easily distinguished from all these species by a completely different male genital sac sclerite and different modification of tergites in the female.

Description. Female (n = 2). As in Figs 4 and 22 . Hypopharyngeal sclerites fully developed. Length of dhs 10, 0.090; dhs 11, 0.116; ratio dhs 10/11, 0.78; ls5 broken, latero-ventral fringe with 10 setae. Gula with 4 setae on each side. Pronotum with 8 setae on posterior margin and 3 medium length spiniform setae at each lateral corner. First tibia with 3 outer ventro-lateral and 4 dorso-lateral setae. Metanotum enlarged, with 4 marginal setae; metasternal plate with 7–9 setae; metapleurites with 3–4 short strong spiniform setae. Femur III with 18–22 setae in ventral setal brush. Tergite I narrow with medium posterior enlargement; tergite II three times larger than I, with anterior margin medially concave due to enlargement of tergite I. Tergites III-IV slightly concave posteriorly as result of enlargement of first tergites. Abdominal segments II–VIII with well-defined median gap in each row of tergal setae ( Fig. 4 ). Tergal setae: I, 17–20; II, 22–24; III, 22–23; IV, 2 2–26; V, 26; VI, 18–20; VII, 12; VIII, 2–4. Postspiracular setae very long on II, IV, VII and VIII (0.41–0.52); and shorter on I, III, V and VI (0.19–0.30). Inner posterior seta of last tergum with length 0.01; length of short lateral marginal seta of last segment, 0.03–0.04. Pleural setae: I, 8–9; II, 8–12; III, 8–10; IV, 6–11; V, 6–8; VI, 6–7; VII, 5–6; VIII, 3–4. Pleurites III–VII with 2–4 slender and longer setae. Pleurite VIII with length of inner setae 0.04–0.06 and outer 0.06–0.07. Anterior margin of sternal plate II with a small medial notch. Sternal setae: I, 0 (female paratype with 1 seta); II, 5 in each aster: s1, 0.11–0.13; s2, 0.08–0.11; s3, 0.05–0.07; s4, 0.03–0.04; s5, 0.02–0.03; with 14–16 marginal setae between asters, 4–5 medioanterior setae; III, 40–46; IV, 44–48; V, 47–54; VI, 45–46; VII, 20–25; VIII–IX, 16–17; and 15–17 setae on scantly serrated vulvar margin, without medioanterior setae on sternites III–VII. Anal fringe formed by 42–45 dorsal and 41–42 ventral setae. Dimensions: TW, 0.50; POW, 0.35; HL, 0.35–0.41; PW, 0.35; MW, 0.55–0.60; AWIV, 0.76–0.88; ANW, 0.27–0.28; TL, 1.86–1.92.

Male (n = 3). As in Fig. 23 . Similar to female except as follows: length of dhs 10, 0.070–0.098; dhs 11, 0.110– 0.112; ratio dhs 10/11, 0.64–0.89. Latero-ventral fringe with 10 setae (one specimen with 11 on one side). Gula with 4–5 setae on each side. Pronotum with 8 setae on posterior margin and 3 short spiniform setae at each lateral corner. First tibia with 3 outer ventro-lateral and 4–5 dorso-lateral setae. Metanotum with posterior margin roughly straight with 4 marginal setae; metasternal plate with 7–10 setae; metapleurites with 3–5 short spiniform strong setae. Femur III with 15–21 setae in ventral setal brush. Abdominal tergites with continuous row of setae on tergites I–V and with short median gap in the row of setae only on tergites VI–VIII. Tergal setae: I, 12–14; II, 18– 21; III, 16–25; IV, 16–23; V, 18–21; VI, 15–22; VII, 12–19; VIII, 7–8. Postspiracular setae same with the same pattern as in female but shorter. Length of inner posterior seta of last tergum, 0.01–0.02; short lateral marginal seta of last segment, 0.01–0.02. Pleural setae: I, 5–7; II, 7–12; III, 7–13; IV, 6–12; V, 6–11; VI, 6–10; VII, 5–9; VIII, 3– 5. Pleurites III–VII with 2–4 slender and longer setae: Pleurite VIII with inner setae (0.02) smaller as the outer one (0.03–0.05). Anterior margin of sternal plate II with a medial notch. Sternal setae: I, 0; II, 4–5 in each aster: s1, 0.08–0.10; s2, 0.07–0.10; s3, 0.05–0.07; s4, 0.03–0.04; s5, 0.02–0.03; with 15–17 marginal setae between asters, 7–14 medioanterior; III, 34–37; IV, 45–49; V, 48–52; VI, 47–51; VII, 28–31; VIII, 9–11; remainder of plate, 14–17; sternites VI–VIII with 0–2 medioanterior setae. Genital sac sclerite as in Fig. 11 . Dimensions: TW, 0.43–0.49; POW, 0.31–0.33; HL and PW, 0.31–0.33; MW, 0.41–0.46; AWIV, 0.55–0.58; GW, 0.12–0.14; GSL, 0.10; TL, 1.45–1.54.

Etymology. The species epithet is a noun in apposition derived from the generic name of the type host.

Figures

FIGURES 4–5. Dorso-ventral views of female thorax and abdomen:4, Myrsidea scleruri n. sp.; 5, Myrsidea zuzanae n. sp.

FIGURES6–17.Male genital sac sclerites:6–7, Myrsidea leucophthalmi n. sp.; 8–10, Myrsidea philydori n. sp.; 11, Myrsidea scleruri n. sp.; 12–13, Myrsidea zuzanae n. sp.; 14–17, Myrsidea pyriglenae n. sp.

FIGURES 22–25. Habitus: Myrsidea scleruri n. sp.: 22, holotype female; 23, paratype male; Myrsidea zuzanae n. sp.: 24, holotype female; 25, paratype male.