Myrsidea pachyramphi

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: 420-422

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-FFFB-FFD7-A5F7-D009FB5219D4

treatment provided by

Plazi

scientific name

Myrsidea pachyramphi
status

new species

Myrsidea pachyramphi  , new species

( Figs 28View FIGURES 28–29, 35View FIGURES 30–40, 45–46View FIGURES 45–48)

Type host. Pachyramphus polychopterus (Vieillot, 1818)  —white-winged becard.

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

Type material. Ex Pachyramphus polychopterus  : holotype ♀, San Rafael National Park, Paraguay (26°30'S, 55°47'W), 8–15 August 2012, I. Literak ( MMBC)GoogleMaps  . Paratypes: 2♀, 3♂ with the same data as holotype ( MMBC)GoogleMaps  .

Diagnosis. Myrsidea pachyramphi  n. sp. is morphologically similar to M. incerta ( Kellogg, 1896b)  and M. pricei Clay, 1966  from members of the Turdidae  , and to M. bessae Price, Johnson & Dalgleish, 2008  and M. alexanderi Kolencik, Sychra, Valan & Literak, 2016  from members of the Troglodytidae  . Combining genetic and morphological difference, the closest species is M. incerta  . However, females of M. pachyramphi  can be distinguished from those of M. incerta  by having (1) a larger number of setae on the femoral brush (18–22 vs 13– 17), and (2) larger dimensions, as follows: MW (0.42–0.43 vs 0.37) and AWIV (0.52–0.57 vs 0.50), while males differ by having a greater total number of setae on sternites IV –VII (85–96 vs 53–82). Further, females of M. pachyramphi  , differ from those of M. pricei  in (1) the shape of the first tergite (more concave in M. pricei  ); and (2) the number of setae on tergites I –IV (total 28–38 in M. pachyramphi  vs. 40–52 in M. pricei  ). Males can be distinguished by the number of setae on tergites I –V (total 29–33 in M. pachyramphi  vs. 39–53 in M. pricei  ). Females of M. pachyramphi  can be easily distinguished from those of M. bessae  by the shape of the metanotum and first two tergites. Finally, M. pachyramphi  differs from M. alexanderi  in the number of setae on tergites I –VII: females with a total of 44–61 setae in M. pachyramphi  vs. 74–90 in M. alexanderi  ; males with a total of 38–43 vs. 63–71.

Description. Female (n = 3). As in Figs 28View FIGURES 28–29 and 45View FIGURES 45–48. Hypopharyngeal sclerites fully developed. Length of dhs 10, 0.045–0.055; dhs 11, 0.090–0.105; ratio dhs 10/11, 0.50–0.52; ls5 0.04–0.05 long, latero-ventral fringe with 10–11 setae. Gula with 4–5 setae on each side. Pronotum with 6 setae on posterior margin and 3 short spiniform setae at each lateral corner. First tibia with 3 outer ventro-lateral and 4 dorso-lateral setae. Metanotum not enlarged, with 8–9 marginal setae; metasternal plate with 6–7 setae; metapleurites with 3–4 short strong spiniform setae. Femur III with 1 8–22 setae in ventral setal brush. Tergites I and II slightly convex. Abdominal segments with welldefined median gap in each row of tergal setae. Tergal setae: I, 6–8; II, 8–11; III, 8–10; IV, 6–9; V, 7–10; VI, 5–8; VII, 4–5; VIII, 4. Postspiracular setae very long on II, IV and VIII (0.45–0.51); long on I and VII (0.30–0.38); and short on III, V and VI (0.12–0.23). Inner posterior seta of last tergum not longer than anal fringe setae with length 0.06–0.08; length of short lateral marginal seta of last segment, 0.03–0.04. Pleural setae: I, 4–5; II, 6–8; III, 7–8; IV, 6–7; V, 5–6; VI –VII, 4–5; VIII, 3. Pleurite VIII with inner setae (0.07–0.09) twice as long as outer (0.04–0.05). Anterior margin of sternal plate II with a medial notch. Sternal setae: I, 0; II, 3–4 in each aster: s1, 0.05–0.06; s2, 0.04–0.05; s3, 0.03–0.04; s4, 0.02–0.03; with 13–16 marginal setae between asters, 3–4 medioanterior; III, 21–24; IV, 32; V, 33–35; VI, 27–30; VII, 10–11; VIII –IX, 8–10; and 10–12 setae on deeply serrated vulvar margin. Anal fringe formed by 40 dorsal and 35 ventral setae. Dimensions: TW, 0.45–0.46; POW, 0.35–0.36; HL, 0.31–0.32; PW, 0.27–0.28; MW, 0.42–0.43; AWIV, 0.52–0.57; ANW, 0.21–0.23; TL, 1.43–1.45.

Male (n = 3). As in Fig. 46View FIGURES 45–48. Similar to female exept as follows: length of dhs 10, 0.045–0.050; dhs 11, 0.093– 0.100; ratio dhs 10/11, 0.48–0.50; ls5 0.05 long, latero-ventral fringe with 10–11 setae. Gula with 5 setae on each side. Pronotum with 6 setae on posterior margin and 3 short spiniform setae at each lateral corner. First tibia with 3 outer ventro-lateral and 4 dorso-lateral setae. Metanotum not enlarged with 6–7 marginal setae; metasternal plate with 6–7 setae; metapleurites with 3 short spiniform strong setae. Femur III with 13–17 setae in ventral setal brush. Abdominal segments with well-defined median gap in each row of tergal setae. Tergal setae: I, 4; II, 6–7; III, 6–8; IV, 7; V, 6–7; VI, 5–6; VII –VIII, 4; Postspiracular setae with the same pattern as in female but shorter. Length of inner posterior seta of last tergum, 0.03–0.05; short lateral marginal seta of last segment, 0.02. Pleural setae: I, 3–4; II, 4–5; III –IV, 5–6; V, 4–6; VI, 4–5; VII, 3–4; VIII, 2–3. Pleurite VIII with inner setae (0.06–0.07) as long as outer (0.02–0.03). Anterior margin of sternal plate II with a medial notch. Sternal setae: I, 0; II, 3–4 in each aster: s1, 0.05–0.06; s2, 0.03–0.04; s3, 0.03; s4, 0.02–0.03; with 8–10 marginal setae between asters, 2–4 medioanterior; III, 15–17; IV, 23–28; V, 27–29; VI, 22–25; VII, 13–14; VIII, 4; remainder of plate, 6–7; and with 3 setae posteriorly; with 8 internal anal setae. Genital sac sclerite as in Fig. 35View FIGURES 30–40. Dimensions: TW, 0.41–0.43; POW, 0.32–0.33; HL, 0.28–0.30; PW, 0.25–0.26; MW, 0.35–0.36; AWIV, 0.42–0.44; GW, 0.10–0.11; GSL, 0.08; TL, 1.23–1.28.

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

Remarks. This is the first record of chewing lice from Pachyramphus polychopterus  . A portion of COI gene was sequenced from two specimens of M. pachyramphi  from Paraguay (GenBank MF563534View Materials MF563535View Materials). Comparing our sequence with all known Myrsidea  sequences, the closest were: (1) those of M. incerta  (ex Catharus ustulatus (Nuttall, 1840)  , GenBank FJ 171268View Materials FJ 171269View Materials, and Catharus minimus (Lafresnaye, 1848)  , GenBank FJ 171270View Materials, family Turdidae  ), with p-distances of 11.9–12.9%, (2) those of M. alexanderi  (ex Pheugopedius maculipectus Lafresnaye, 1845  , GenBank MF563536View Materials), and M. bessae  (ex Pheugopedius fasciatoventris Lafresnaye, 1845  , GenBank EU289214View Materials, and Cantorchilus semibadius Salvin, 1870  , GenBank EU289213View Materials family Troglodytidae  ), with p-distances of 12.7–13.7%, and (3) that of M. pricei  (ex Catharus guttatus (Pallas, 1811)  , GenBank FJ 171273View Materials), with a p-distance of 13.7%. These divergences are close to the limit of accepted interspecific variation but, together with their morphological differences, we are confident that M. pachyramphi  is a distinct species. Further molecular data are needed to clarify the phylogenetic relationships of these species within the species-complex and confirm their valid status as species or subspecies.

MMBC

Moravske Muzeum [Moravian Museum]

COI

University of Coimbra Botany Department