Myrsidea leucophthalmi

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: 408-409

publication ID

https://doi.org/10.11646/zootaxa.4418.5.1

publication LSID

lsid:zoobank.org:pub:04FEA195-71DA-4C7E-A62B-A658CFCF6B0C

persistent identifier

http://treatment.plazi.org/id/03F887AB-FFEF-FFCA-A5F7-D3B7FE5E1989

treatment provided by

Plazi

scientific name

Myrsidea leucophthalmi
status

new species

Myrsidea leucophthalmi  , new species

( Figs 2View FIGURES 2–3, 6–7View FIGURES6–17, 18–19View FIGURES 18–21)

Type host. Automolus leucophthalmus (Wied, 1821)—white-eyed foliage-gleaner.

Type locality. San Rafael National Park , Paraguay (26°30'S, 55°47'W).GoogleMaps 

Type material. Ex Automolus leucophthalmus: holotype ♀, San Rafael National Park, Paraguay (26°30'S, 55°47'W), 18 and 20 August 2012, I. Literak ( MMBCAbout MMBC)GoogleMaps  . Paratypes: 2♀, 3♂ with the same data as holotype ( MMBCAbout MMBC)GoogleMaps  .

Diagnosis. Myrsidea leucophthalmi  n. sp. is morphologically close to M. ochrolaemi Sychra  [in Sychra et al.], 2007 in the following characters: (1) male genital sac sclerite, (2) female metanotum slightly enlarged with rounded posterior margin and (3) shape of abdominal tergites of female. However, M. leucophthalmi  is easily distinguished from M. ochrolaemi  by (1) fewer setae on: female tergite I (19–21 vs 22–33), female tergites II –IV (14–17 vs 18–33); male tergite IV (12–14 vs 15–20) and tergite V (12–13 vs 14–17); (2) presence of continuous row of setae on tergite I only (vs continuous row of setae on tergite I –III in M. ochrolaemi  ) (3) fewer setae on female sternites IV and V (32–37 vs 39–48).

Description. Female (n = 3). As in Figs 2View FIGURES 2–3 and 18View FIGURES 18–21. Hypopharyngeal sclerites fully developed. Length of dhs 10, 0.043–0.063; dhs 11, 0.108–0.127; ratio dhs 10/11, 0.39–0.54; ls5, 0.03 long, latero-ventral fringe with 9–10 setae. Gula with 3–4 setae on each side. Pronotum with 6 setae on posterior margin and 3 short spiniform setae at each lateral corner. Prosternal plate with rounded anterior margin ( Fig. 2View FIGURES 2–3). First tibia with 3 outer ventro-lateral and 4 dorso-lateral setae. Metanotum slightly enlarged with rounded posterior margin, with 11–15 marginal setae; metasternal plate with 6–8 setae; metapleurites with 3–4 short strong spiniform. Femur III with 14–19 setae in ventral setal brush. Tergites not enlarged and unmodified, only tergite I and II with very slightly rounded posterior margin ( Fig. 2View FIGURES 2–3). Abdominal segments with continuous row of setae on tergite I and median gap in the row of tergal setae on tergites II –VIII. Tergal setae: I, 19–21; II, 17; III, 15–17; IV, 14–16; V, 14; VI, 12–14; VII, 10–12; VIII, 4– 5. Postspiracular setae very long on II, IV and VIII (0.45–0.50); long on I and VII (0.26–0.37); and short on III, V and VI (0.11–0.23). Inner posterior seta of last tergum not longer than anal fringe setae with length 0.02–0.05; length of short lateral marginal seta of last segment, 0.05. Pleural setae: I, 7–9; II, 9–10; III, 8–11; IV, 8–9; V, 7–8; VI, 6; VII, 5; VIII, 3. Pleurites mostly with short spine-like setae; slender and longer setae on pleurites IV –VII, 0– 2; without anterior setae. Pleurite VIII with inner setae (0.05–0.06) as long as outer (0.05–0.06). Anterior margin of sternal plate II with a medial notch. Sternal setae: I, 0; II, 5 in each aster, aster setae length: s1, 0.10–0.12; s2, 0.07– 0.11; s3, 0.05–0.06; s4, 0.05–0.06; s5, 0.03–0.04; with 11–13 marginal setae between asters, 4–6 medioanterior; III, 20–24; IV, 32–37; V, 33–37; VI, 30–31; VII, 16–19; VIII –IX, 13–16; and 14–18 setae on deeply serrated vulvar margin; in one specimen sternites IV –V with 1 medioanterior seta. Anal fringe formed by 43–51 dorsal and 45–47 ventral setae. Dimensions: TW, 0.49–0.50; POW, 0.37; HL, 0.34–0.35; PW, 0.30–0.32; MW, 0.48–0.51; AWIV, 0.65–0.66; ANW, 0.27; TL, 1.50–1.55.

Male (n = 3). As in Fig. 19View FIGURES 18–21. Similar to female except as follows: length of dhs 10, 0.048–0.050; dhs 11, 0.100– 0.113; ratio dhs 10/11, 0.44–0.48; ls5 0.03–0.04 long, latero-ventral fringe with 9–10 setae. Gula with 3 setae on each side. Metanotum not enlarged with 8–10 marginal setae; metasternal plate with 7 setae; metapleurites with 3– 4 short spiniform strong setae. Femur III with 11–15 setae in ventral setal brush. Abdominal segments with welldefined median gap in each row of tergal setae. Tergal setae: I, 12–16; II, 12–15; III, 1 1–15; IV, 12–14; V, 12–13; VI, 12–14; VII, 11; VIII, 4–6; Postspiracular setae very long on II, IV and VIII (0.45–0.49); long on I and VII (0.20–0.31); and short on III, V and VI (0.07–0.12). Length of inner posterior seta of last tergum, 0.04–0.05; short lateral marginal seta of last segment, 0.02. Pleural setae: I, 5–7; II, 7–9; III, 7–8; IV, 6–8; V, 5–7; VI, 4–5; VII, 4; VIII, 3. Pleurites I –III with only short spine-like setae; pleurites IV –VII with 1–2 slender setae; without anterior setae. Pleurite VIII with inner setae (0.05–0.06) twice as long as outer (0.02–0.03). Anterior margin of sternal plate II with a medial notch. Sternal setae: I, 0; II, 5 in each aster: s1, 0.08–0.10; s2, 0.07–0.10; s3, 0.06–0.07; s4, 0.04– 0.06; s5, 0.03–0.04; with 12–13 marginal setae between asters, 5–6 medioanterior; III, 17–21; IV, 24–28; V, 28–30; VI, 25–28; VII, 19–20; VIII, 14; remainder of plate, 13–15; and with 5–6 setae posteriorly; in one species sternite VIII with 1 medioanterior seta. With 8 internal anal setae. Genital sac sclerite as in Figs 6–7View FIGURES6–17. Dimensions: TW, 0.43–0.45; POW, 0.32–0.33; HL, 0.30–0.32; PW, 0.26–0.28; MW, 0.39–0.40; AWIV, 0.48–0.49; GW, 0.08–0.12; GSL, 0.08–0.12; TL, 1.28–1.29.

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

Remarks. This is the first record of a chewing louse from Automolus leucophthalmus. A portion of COIAbout COI gene was sequenced from specimens of M. leucophthalmi  from Paraguay (GenBank MF563529View Materials). As expected, the closest species among other published sequences of Neotropical Myrsidea  was M. ochrolaemi  (ex Automolus ochrolaemus (Tschudi, 1844), family Furnariidae, GenBank  JN638820View Materials), with a sequence divergence of 11.7%. This divergence is close to the limit of accepted interspecific variation (see Price et al. 2008a; Kolencik et al. 2017) but, together with their morphological differences, we are confident that M. leucophthalmi  and M. ochrolaemi  represent separate species.

MMBC

Moravske Muzeum [Moravian Museum]

COI

University of Coimbra Botany Department